Authentication of events through verification and validation of computer files

Abstract

The present invention relates to a method for controlling multimedia content relating to an event (EV), comprising the following steps: a) capturing multimedia content comprising the event (EV) using communication terminals (T1, T2) to generate a multimedia file; b) recovering metadata generated by the terminals (T1, T2); c) processing the multimedia file by assigning the generated metadata to the multimedia content to certify the multimedia file; d) transmitting the certified multimedia file to a central server (10); e) issuing a geographical location notification to terminals (T1', T2') located in a predefined area in the vicinity of the event (EV) to inform them of the presence of the certified multimedia file and to request verification of the certified multimedia file by activating or deactivating the latter.

Description

[Technical field]

[0001] The present invention relates to the field of systems and methods for capturing any type of digital media, in particular multimedia content intended to be shared and / or published over the Internet, such as, for example, on social networks.

[0002] One of the objectives of the present invention is to provide a reliable and robust solution for the authentication of events by relying on computer files, for example multimedia files. In the context of the present invention, a multimedia file must be understood as any computer file that contains digital data of multimedia type in the form of videos, photos, audio. Other formats may also be considered.

[0003] The present invention also covers the certification and verification of any computer file, including multimedia data and other data, e.g. metadata such as location data and / or intrinsic and / or external data relating to the communication terminal and / or the "data" itself (digital and multimedia data), and intended to be shared and / or published on digital media, in particular on the Internet, e.g. in social networks, or on any private or public, closed or open communication channel.

[0004] The present invention will find numerous advantageous applications for all parties involved in the information sharing and / or broadcasting chain, in particular on the Internet and social networks, and in particular for information producers, including witnesses to any event to be shared or broadcast, such as journalists and reports, as well as for recipients and broadcasters of this information, in particular news agencies and media for journalists and reporters, i.e. both for news agencies and media.

[0005] It should be understood that the present invention will also find other advantageous applications in other fields, such as, for example, the field of referencing multimedia evidence or the broader security field. The present invention can therefore also be applied in any application requiring certification and verification of events, such as, for example, the military, special forces, firefighters, rescue teams, the event industry, the construction and public works sector, public services, etc. [Background technology]

[0006] The Internet, and more generally the new information and communication technologies (also known by the English acronym ICT, which stands for "Information and Communication Technologies"), have completely transformed the way information is accessed in recent years. Thus, the various alternative broadcasting channels, especially social networks on websites such as Facebook® or Twitter®, as well as the numerous discussion forums and blogs, have become today inevitable media for broadcasting information.

[0007] In some countries, alternative broadcasting and receiving channels, especially the Internet and social networks, may sometimes be the only media through which people have access to uncensored information.

[0008] Through these new channels, we can see information spreading rapidly and disseminating around the world in real time. However, these alternative broadcasting channels, especially the Internet, and the information circulating on these networks are not always reliable.

[0009] It is known that those who publish information on alternative broadcast channels, particularly the Internet and its social networks, often demonstrate extremely poor judgment.

[0010] Unlike professional journalists, whether corporate or independent, alternative broadcasting channels, and especially users of the Internet and social networks, are not bound by journalistic ethics and therefore are not bound by elementary rules such as the need to verify facts, sources and information.

[0011] These journalistic rules are fundamental to a journalist's work.

[0012] Given the absence of such information control, today it is possible to transmit a huge amount of unverified information through alternative broadcasting channels, in particular the Internet and its social networks.

[0013] For these reasons, we can now find inaccurate, erroneous and even completely false information coming from bloggers, the media, politicians and even governments on alternative broadcasting channels, especially on the Internet and their social networks: this is "fake news".

[0014] The dissemination of these misinformation is often intended solely to manipulate or mislead the public for commercial, political or ideological purposes.

[0015] The dissemination and proliferation of this “fake news” is crucial in the Internet age, because today people no longer seek information from corporate news agencies, but from alternative networks, especially the Internet and social networks such as Facebook® or Twitter®, as well as directly from certain influencers.

[0016] Given the growing popularity of alternative broadcast channels, especially social networks, and the proliferation of such unchecked information, it is essential to be able to control the content and origin of inventions.

[0017] Of course, in such channels and networks, these multimedia files are distributed in large quantities and the amount of data is extremely large, making such management even more difficult.

[0018] Nevertheless, there have been attempts in the prior art to provide solutions intended to address this phenomenon.

[0019] In particular, the company Safe Creative® is known to offer a commercialized solution under the brand Safe Stamper®, which provides technology for generating and managing copyright certificates for digital multimedia files.

[0020] This prior art is described in US Pat. No. 5,399,623, US Pat. No. 5,499,633, US Pat. No. 5,599,623 and US Pat. No. 5,599,633.

[0021] The last patent document describes the following steps: - Restoration and display of multimedia content during production; - Restoration and display of the creation date of multimedia content; - Viewing captured multimedia files; and - Restoration and display of the production site of multimedia content Includes.

[0022] Nevertheless, the applicant alleges that the solutions deployed according to this technology have a number of drawbacks, namely that the process of validation of multimedia content is not comprehensive and does not guarantee complete control of the information.

[0023] The applicant further submits that this solution does not fully exploit the power offered by the metadata generated by the communication terminal during the production process of the multimedia file.

[0024] This only makes it possible to prove the creation process of a file, without taking into account the occurrence of events.

[0025] Also known is US Pat. No. 5,399,633, which is in the field of proof of authenticity of multimedia content exchanged over a data network between different users.

[0026] The solution proposed in US Patent No. 5,999,133 is primarily aimed at authenticating images of an event captured using a first user's terminal by generating an archival code from the image metadata in order to create a digital fingerprint.

[0027] The method proposed in this patent document 5 comprises the following steps: - Creation of the first digital image; -Initiating the processing of digital images resulting in the creation of archival digital fingerprints; - creating a second image comprising a superposition of the first digital fingerprint on the first digital image; - sending a first message including the second digital image to at least one first recipient by a communication interface of the first electronic terminal, resulting in the creation of an archival code; Here, the transmission of a first message to a first recipient simultaneously triggers the transmission of a second message to a trusted third party whose sole purpose is to store this message.

[0028] File content verification is not possible with this solution.

[0029] US Pat. No. 5,399,633 provides a complex solution that is not robust enough and the information is not verified.

[0030] The Applicant therefore submits that up to now there exists no reliable and robust technique that makes it possible to authenticate events by controlling multimedia files, and more generally computer files. [Prior art documents] [Patent documents]

[0031] [Patent Document 1] Spanish Patent No. 2472272 [Patent Document 2] Spanish Patent No. 2592533 [Patent Document 3] Spanish Patent No. 2624916 [Patent Document 4] Spanish Patent No. 2659691 [Patent Document 5] French Patent Application Publication No. 3095874 Summary of the Invention [Problem to be solved by the invention]

[0032] The present invention aims to improve the above situation. One object of the present invention is to solve at least one of the problems of the above background art. In particular, one object of the present invention is to overcome various of the above drawbacks by providing a solution for controlling digital content related to an event. [Means for solving the problem]

[0033] According to a first aspect, the object of the invention relates to a method for controlling at least one digital content, for example a multimedia content, relating to an event.

[0034] According to the invention, the method comprises the following steps: a) using a communication terminal (also called production terminal) to capture digital content, e.g. multimedia content containing an event, to generate a computer file, a so-called multimedia file; b) recovering metadata generated by the communications terminal during said capture process; c) processing the file (e.g., a multimedia file) by assigning the generated metadata to digital content (e.g., multimedia content) to create a digital fingerprint configured to authenticate the digital file (e.g., a multimedia file); d) transmitting said authenticated digital file by said digital fingerprint to a central server; e) transmitting, by the central server, notification of the geographic location information to at least one local computer entity to request the at least one local computer entity to validate the attested multimedia file by validating the digital content of the attested multimedia file; Includes.

[0035] In one embodiment, during the dispatch step, it is provided to send the notification to at least one local server. In this specification, this is understood to consist of a server that may contain local data related to said event. Such a server may be located anywhere. It is mainly characterized by the local data it may store.

[0036] In this embodiment, during the verification process, validation of the digital content of the certified multimedia file involves a comparison of said digital content with local data stored by the local server.

[0037] Preferably, the digital content includes images relating to the event.

[0038] Preferably, said comparing comprises running an image processing algorithm to compare said local data with said image.

[0039] Preferably, the local data stored by said at least one local server is of GEOINT (short for "GEO spatial intelligence") or OSINT (short for "Open Source Intelligence") type.

[0040] In another embodiment, which may be combined with the previous embodiment, it is provided that during the transmitting step, a notification of the geographical location information is transmitted to all communication terminals located within a predefined area proximate to said event.

[0041] Advantageously, the verification step comprises: - visualizing digital content by a user on an interface of one of the communication terminals located within the predetermined area proximate to the event; - activating the digital content if the digital content corresponds to an event perceived by the user on the area through an interaction between the user and the communication terminal. Includes.

[0042] This third party verification then takes the form of validation (or invalidation) of the digital content, for example via a human machine interface (for example a GUI type graphical interface), so that each third party can visualize the content of the file on his terminal and validate it, for example by checking a "file verified" or "file valid" box.

[0043] In this way, the invention allows other witnesses of the event to validate or invalidate the content of the multimedia files generated during the event, which can be done according to various formats, for example using a "yes / no" type survey.

[0044] The combination of technical steps and features of the present invention allows simple control of multimedia content distributed over the Internet by utilizing communication terminal metadata associated with the capture of multimedia content.

[0045] Advantageously, the notification issued by the central server includes a request to capture further digital content relating to the same event.

[0046] The invention thus allows a first generated file to be verified with other generated files relating to the same event, in which case the verification therefore involves a comparison of the content of the first file with the content of at least one other second file, for example this comparison can involve image processing algorithms intended to compare images of the same event to determine similarities therein (colorimetry, motion detection, shape recognition, etc.).

[0047] For example, the automated comparison of content with GEOINT and OSINT data using artificial intelligence algorithms of the computer vision type does not necessarily require any human intervention, apart from the interpretation of the results of said automated comparison made possible by a local server.

[0048] Advantageously, following this request, at least one of the third party communication terminals located in the area captures another digital content including the event and generates a third party multimedia file which is then passed through steps b), c) and d) above to the central server restoring the at least one authenticated third party multimedia file.

[0049] Advantageously, the central server associates at least one certified third party multimedia file with the certified multimedia file to create a verified multimedia file accessible from all communication terminals (also so-called reference terminals) connected to the central server.

[0050] Thus, the invention allows for the encapsulation of all generated files relating to the same event, which ensures good reliability of files of the same event.

[0051] Advantageously, the method according to the invention comprises the creation, by at least one other set of communication terminals, of another verified multimedia file relating to the same event.

[0052] Advantageously, the verified multimedia file and the at least one other verified multimedia file are stored on a central server.

[0053] Advantageously, metadata of the certified multimedia file and the certified third party multimedia file present in the verified multimedia file and in the at least one other verified multimedia file are compared with each other.

[0054] Such comparison is preferably performed in an automated manner, for example by a dedicated comparison algorithm executed on said central server.

[0055] For example, such algorithms may also implement "machine learning" type learning methods.

[0056] If there is a similarity between the metadata during this comparison, the method according to the invention comprises creating an authenticated event associating the verified multimedia file with at least one other verified multimedia file, said authenticated event being accessible from all communication terminals connected to the server (here so-called reference terminals).

[0057] It should be understood that this creation of certified events is done automatically using proprietary algorithms.

[0058] Advantageously, the central server generates an interactive map, automatically generated videos and / or 3D renderings of the event making it possible to browse all certified, verified or authenticated multimedia files according to the information regarding the location of the event contained in the metadata.

[0059] Thus, the invention makes it possible to reference the generated files on interactive maps and / or videos and / or 3D renderings made available to all users of the system.

[0060] Advantageously, the metadata includes at least some of the information relating to time, date, location, altitude, movement, path taken, speed of movement, direction of view, nature of the content such as audio, photo or video, time of capture, type of communication terminal (model, serial number, reference number, etc.), creator and description.

[0061] Advantageously, the region is determined by a separation distance relative to said event or communication terminal, comprised between 0 and 100 metres, preferably substantially 50 metres.

[0062] Advantageously, the method according to the invention comprises an analysis of the multimedia content, and in particular of the images and / or sounds contained in the multimedia file (objects, shapes, colors, luminosity, background noise), generating from this analysis a digital fingerprint associated with this content, which represents the real ID card of the multimedia content.

[0063] Preferably, this digital fingerprint is associated with said certificate.

[0064] Therefore, the certificate becomes non-fungible.

[0065] In an advantageous embodiment, the certificate and the digital fingerprint may be stored on a blockchain type server.

[0066] In this context, an object of the present invention relates according to a second aspect to a system for controlling digital content, for example multimedia content relating to an event, said system comprising at least one communication terminal and a management server, said communication terminal being operable to: - a capture unit (video camera, photo camera, voice recorder, etc.) configured to capture digital content, such as multimedia content including an event; and - a processing unit configured to generate computer files, so-called multimedia files Equipped with.

[0067] Advantageously, the processing unit is adapted to process the computer file (e.g. a multimedia file) by recovering the metadata generated by the communication terminal during capture and assigning the generated metadata to the multimedia content in order to authenticate the multimedia file; and Advantageously, the communication terminal comprises communication means adapted to transmit the certified multimedia file to a central server.

[0068] Advantageously, the central server is configured, after receiving the certified multimedia file, to send a geographical location notification to all communication terminals located within a predefined area proximate to the event to inform them of the presence of the certified multimedia file and to request each communication terminal in this area to verify the certified multimedia file through activation or deactivation of the multimedia content.

[0069] Advantageously, the system according to the invention comprises computer means arranged for the execution of the steps of the method as described above.

[0070] According to a third aspect, an object of the invention relates, inter alia, to a computer program comprising instructions adapted for the execution of the steps of the method according to the first aspect of the invention, when said computer program is executed by at least one processor.

[0071] Such computer programs may use any programming language and may be in source code, object code, or a code intermediate between source code and object code, for example in a partially compiled form, or in any other desired form.

[0072] According to a fourth aspect, the object of the present invention relates to a computer readable storage medium having recorded thereon a computer program comprising instructions for carrying out the steps of the method according to the first aspect of the invention.

[0073] On the other hand, the recording medium may consist of any entity or device capable of storing a program. For example, the medium may include a storage means, such as a ROM memory, a CD-ROM or a microelectronic circuit type ROM memory, or a magnetic recording means or a hard disk.

[0074] On the other hand, the recording medium may also consist of a transmissible medium, for example an electrical or optical signal, such a signal being routed via an electrical or optical cable, by conventional radio frequency or Hertzian waves, by a self-regulating laser beam, or by other means. In particular, the computer program according to the invention can be downloaded over an Internet type network.

[0075] Alternatively, the recording medium may be an integrated circuit in which the computer program is embedded, the integrated circuit being adapted for performing or for use in performing the method contemplated.

[0076] Thus, thanks to its different functional and structural forms as described above, the object of the present invention is to make it possible to authenticate the occurrence of one or more events by verification of multimedia content relating to this or these same events, certified using metadata generated by a production terminal at the source of the content, and to authenticate the verification of said content through activation or deactivation by a third party terminal located in the area close to said event.

[0077] Other features and advantages of the present invention will become apparent from the following description of specific, non-limiting embodiments of the invention, taken in conjunction with the accompanying Figures 1 to 17. [Brief description of the drawings]

[0078] [Figure 1] FIG. 1 shows a schematic diagram of a system configuration for controlling multimedia content related to an event according to one embodiment of the present invention. [Diagram 2] FIG. 2 shows another detailed schematic diagram of the configuration of the system according to FIG. 1 for authentication of multimedia files. [Diagram 3] FIG. 3 shows a flow chart of the various steps of a method executed by a system according to FIG. 1 or FIG. [Figure 4] FIG. 4 is an illustration showing the execution of one of the steps of the method according to FIG. [Diagram 5] FIG. 5 is an illustration showing the execution of one of the steps of the method according to FIG. [Figure 6] FIG. 6 is an illustration showing the execution of one of the steps of the method according to FIG. [Figure 7] FIG. 7 is an illustration showing the execution of one of the steps of the method according to FIG. [Figure 8] FIG. 8 illustrates the execution of one of the steps of the method according to FIG. [Figure 9] FIG. 9 is an illustration showing the execution of one of the steps of the method according to FIG. [Figure 10] FIG. 10 is an explanatory diagram showing the execution of one of the steps of the method according to FIG. [Figure 11] FIG. 11 is an illustration showing the execution of one of the steps of the method according to FIG. [Figure 12] FIG. 12 is an explanatory diagram showing the execution of one of the steps of the method according to FIG. [Figure 13] FIG. 13 is an illustration showing the execution of one of the steps of the method according to FIG. [Figure 14] FIG. 14 is an explanatory diagram showing the execution of one of the steps of the method according to FIG. [Figure 15] FIG. 15 is an explanatory diagram showing the execution of one of the steps of the method according to FIG. [Figure 16] FIG. 16 is an explanatory diagram showing the execution of all the steps of the method according to FIG. 3 for enabling a number of communication terminals to access controlled multimedia content. [Figure 17] FIG. 17 shows a schematic diagram of a system for controlling multimedia content related to an event according to one embodiment of the present invention according to FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0079] The control system 100 and associated methods are described below with reference to Figures 1-17 in conjunction with each other.

[0080] Throughout the following description, identical elements are designated by the same reference numerals.

[0081] As explained in the introduction, the massive flow of information circulating on alternative broadcast channels, especially on the Internet and various social networks, fosters the emergence of misinformation.

[0082] The present invention aims to overcome this problem by providing a new approach to authenticating multimedia content.

[0083] The present invention achieves this objective in the following examples.

[0084] In this example, and as shown in FIG. 16, a hypothetical situation of an event EV, such as an explosion at Kabul airport that occurred at approximately 3:50 p.m. on August 26, 2021, is considered.

[0085] In this embodiment and as shown in FIG. 4, a witness U1, here a so-called user, has a communication terminal T1 equipped with a capture unit 21, for example a camera.

[0086] During the capture step S0 shown in FIG. 5, user U1 captures the scene relating to this explosion EV using the camera 21 of his terminal T1.

[0087] In this example, user U1 therefore captures this explosion EV for 60 seconds at 3:55 pm.

[0088] In this embodiment and as shown in FIG. 5, the communication terminal T1 of the user U1 generates, during a step S1, a multimedia file F1 containing multimedia content related to this explosion EV, here a film.

[0089] One of the concepts underlying the present invention for controlling the authenticity of captured multimedia content consists of utilizing metadata generated by the communication terminal that captured the multimedia content.

[0090] It should be noted here that the capture unit 21 may also be separate from the communication terminal itself: it may consist of a production terminal (video camera, photo camera, voice recorder, etc.) structurally independent of the communication terminal and connected directly or indirectly to the communication terminal by wired or wireless means allowing pairing between the communication terminal and the capture unit.

[0091] In this embodiment, the communications terminal T1 comprises a processing unit 22 executing a processing algorithm adapted to recover the metadata M1 generated by said terminal T1 during this capture S0 (FIG. 6).

[0092] These metadata M1 describe a number of pieces of information about the multimedia content itself or about the communication terminal used to capture the multimedia content itself. These metadata characterize the captured multimedia content and therefore include information about the source of the multimedia content (title, creator, date, time, capture duration, terminal type, terminal model, etc.), the nature of the multimedia content (video, photo, audio, etc.), its information content (descriptors, keywords, summary) and its physical location (location and GPS coordinates, altitude, movement, path followed, speed of movement, metadata viewpoint orientation, etc.). These metadata may also contain further information.

[0093] In this example, these metadata M1 include the following information (location: Kabul; date: August 26, 2021; time: 3:55 pm; altitude: 1,791 meters; orientation: vertical; movement: still; location: southeast; type: video; duration: 60 seconds; owner: Ali; keywords: Taliban, etc.).

[0094] Therefore, in this embodiment, the processing algorithm of unit 22 processes, during step S3, the multimedia file F1 (here, the file contains a video footage of an explosion captured by terminal T1) by assigning to it metadata M1 generated by terminal T1 during capture S0, thereby authenticating the file F1 and thus obtaining a certified file FC1 (Figure 7).

[0095] This authentication of a file F1 containing multimedia content by metadata M1 generated by the communications terminal T1 capturing the multimedia content is a feature of the present invention.

[0096] In this embodiment and as shown in FIG. 8, the certified file FC1 is then transmitted during a step S4 to a remote server, for example a central server 10 which is a server on the cloud, ie a "cloud" server.

[0097] It should be understood here that the communications terminal T1 therefore comprises communication means 23 capable of communicating with the central server 10. Such means are for example conventional using mobile networks such as 4G (or LTE Advanced according to 3GPP Release 10 - Version 10) or 5G networks.

[0098] In this embodiment, the certified file FC1 is therefore received by the central server 10 via a dedicated communications interface 12 and recorded in a memory 11.

[0099] For example, such memory 11 may correspond to a memory storage device that may include volatile and / or non-volatile memory, and / or volatile and / or non-volatile memory, such as EEPROM, ROM, PROM, RAM, DRAM, SRAM, flash, a magnetic disk, or an optical disk.

[0100] After receiving the certified multimedia file FC1 and recording it in the memory 11, the server 10 comprises a processor 13 which during step S5 instructs the interface 12 (transmitting means) to transmit a geographical location information notification REQ to all communication terminals T1' located within a predefined area in the vicinity of the explosion EV (for example within a radius of 50 meters around the terminal T1).

[0101] Such a notification REQ is intended to signal the presence of the certified multimedia file FC1 to all terminals T1' in the vicinity of terminal T1 and to request each of these terminals T1' to verify S6 the certified multimedia file FC1 by activating or deactivating it.

[0102] In this embodiment, the NOTIFICATION REQ therefore makes it possible to alert all terminals T1' located within a radius of 50 meters around terminal T1 that a multimedia content (here a film) has been released and that these terminals T1' are requested to verify this content.

[0103] By referring to this notification REQ, each user present in the vicinity of the publication location of the certified file FC1 can refer to the certified file FC1 on the interface of his / her terminal T1' (Figure 9) and can decide whether or not to validate the content during the verification step S6.

[0104] In this embodiment, for example, two icons may be provided on the interface of a dedicated application installed on each terminal T1', one for activation and another for deactivation.

[0105] As shown in FIG. 10, a third party user can thus enable (OK) or disable (NOK) the multimedia content through a simple interaction with the interface.

[0106] This notification REQ also contains an invitation to subsequently generate a third party certified file FC1' for the same event EV under the same conditions as the certified file FC1.

[0107] Each terminal T1' then repeats the same steps as above to capture multimedia content in turn, associate the captured content with metadata to certify the captured content, and then transmit the third-party certified file FC1' to the central server 10.

[0108] In this embodiment, and as shown in FIG. 2 or FIG. 11, the memory 11 of the server 10 stores all of the third-party certified files FC1' generated by terminal T1' and the certified files FC1 generated by terminal T1.

[0109] Further, as shown particularly in FIG. 11, the processor 13 then executes, during step S7, a processing algorithm configured to associate a certified file FC1' of another third party with the certified file FC1 in the verified file FV1.

[0110] Thus, as shown in FIG. 12, after the verification process by the geographical location information notification REQ, a verified file FV1 associated with the certified file FC1 and another third party certified file FC1' generated by a user of the system located in the vicinity of the publication location of the certified file FC1 is recorded in the memory 11 of the server 10 and made accessible to all other users of the system 100 who are equipped with a communication terminal T3 and have access to the server 10.

[0111] One of the objectives of the present invention is to be able to authenticate an event EV with several verified files.

[0112] In this embodiment, another set of users is provided, including a user U2 equipped with another terminal T2, as shown in FIG.

[0113] In the embodiment described here, this user U2 also witnessed the EV explosion in Kabul.

[0114] In this example, user U2 takes a picture of the scene at 3:56 pm.

[0115] As shown in FIG. 13, a communication terminal T2 of a user U2 generates a multimedia file F2 containing a photo related to the explosion EV.

[0116] If user U2 witnesses the same explosion EV as user U1 and the conditions are substantially the same (Kabul, time of occurrence, altitude), some of the metadata will be different.

[0117] In this embodiment, -Users U1 and U2 have different points of view (POV) of the explosion, i.e., user U1 is located in the southeast and user U2 is located in the northeast; -User U1 is stationary, whereas user U2 is active It is important to note that.

[0118] The multimedia file F2 generated by the terminal T2 then undergoes all the steps described above for the multimedia file F1 to be certified, to generate a certified file FC2.

[0119] Thus, as described above and as shown in FIG. 16, the certified file FC2 is also sent to a central server 10 which sends notification of geographic location information to all other terminals T2' located in the vicinity of terminal T2 in order to generate other certified third party files FC2' generated by terminal T2'.

[0120] In this embodiment, and as shown in FIG. 14, at the end of the process, the server 10 then generates another verified file FV2 which includes all third party certified files FC2' generated by terminal T2' and the certified file FC2 generated by terminal T2.

[0121] The verified files FV1 and FV2 are then recorded on the server 10 and made visible to all other users of the system 100.

[0122] In this embodiment, the processor 13 of the server 10 includes a configured processing algorithm for formulating a request during step S8 to analyze and compare the metadata (M1, M2) (timestamp, location, altitude, movement, path followed, speed of movement, viewpoint direction, nature of the multimedia content, capture time, terminal used for capture, file creator, description) of the certified files (FC1, FC2) and third-party certified files (FC1', FC2') present in all verified files FV1, FV2.

[0123] If there is similarity between the metadata (timestamp, location, viewpoint, description) of the certified files (FC1, FC2) present in the verified files (FV1, FV2) and the third-party certified files (FC1', FC2'), the algorithm formulates a request during step S9 to associate the verified files FV1, FV2 with the authenticated event EA (Figure 15).

[0124] After a positive result of the metadata analysis and comparison results in similarities between the verified files, an authenticated event EA associated with the verified files FV1 and FV2 is recorded on the server 10 and made viewable by all other users of the system 100.

[0125] Thus, at the end of the process, we obtain a number of multimedia files, all containing content that has been certified and strongly verified, and that allows us to authenticate the event.

[0126] Thus, the present invention provides significant benefits to participants in the editorial network, from reporters in the field to wire service media.

[0127] Thanks to the present invention, reporters no longer need to precisely describe the contents of their files (date, time, location, etc.), since the certified files contain the metadata of the communication terminal.

[0128] Media no longer have to spend time searching for content on social networks or from freelance journalists, or having to re-explain in what context the content they receive is presented.

[0129] The approach proposed in the context of the present invention and allowing to attest to content through upstream validation makes it possible to significantly reduce the often tedious task of journalists who have to systematically verify the authenticity of each multimedia content they receive.

[0130] This makes the task much easier and limits the risk of exposing poorly verified content or losing time in the process of browsing received content.

[0131] Finally, for news agencies, the invention: - Search for content on social networks or from independent journalists; - A description of the context in which the received content was featured; - Approximate verification of received content; - The process of browsing received content This significantly limits time lost on the

[0132] The present invention also limits the risk of publishing poorly verified content.

[0133] Finally, the applicant submits that the invention is applicable to any other profession, including journalism. In short, the invention is aimed at creating multimedia evidence (video, photos, audio) that is virtually impossible to forge, and more generally at referring to information, whether it consists of information of journalists or not.

[0134] It can therefore be envisaged that the present invention finds wider application in the security field and can be used, for example, by engineers, firefighters or law enforcement forces at airport or highway sites, helping them to refer in a smart way to information that may cause damage to goods or persons.

[0135] While this detailed description protects certain embodiments of the invention, it should be recognized that in no event is this description intended to limit the scope of the invention, but rather to avoid any inaccuracies or any poor interpretation of the following claims.

[0136] It is to be appreciated that the reference signs placed between parentheses in the following claims shall in no way have a limiting nature, but that these signs are merely intended to improve the comprehension and interpretation of the following claims and the scope of protection sought.

Claims

1. A method for controlling digital content relating to an event (EV), comprising the steps of: a) using communication terminals (T1, T2) to capture (S0) digital content relating to an event (EV) and generate (S2) computer files (F1, F2), so-called multimedia files; b) recovering (S2) metadata (M1, M2) generated by said communication terminals (T1, T2) during said capture (S0); c) processing the multimedia files (F1, F2) by assigning the generated metadata (M1, M2) to the digital content to create (S3) a digital fingerprint adapted to authenticate the multimedia files (F1, F2); d) transmitting (S4) said multimedia files (FC1, FC2) authenticated by said digital fingerprints to a central server (10); e) sending (S5) a notification (REQ) of geographical location information by said central server (10) to at least one local computer entity (T1', T2', 20) requesting (S6) said at least one local computer entity (T1', T2', 20) to verify said certified multimedia file (FC1, FC2) by validating the digital content of said certified multimedia file (FC1, FC2); The method includes:

2. 2. The method according to claim 1, wherein during said sending step (S5), a notification (REQ) is sent to at least one local server (20).

3. 3. The method according to claim 2, wherein during the verification step (S6), validation of the digital content of the certified multimedia files (FC1, FC2) comprises a comparison of the digital content with local data stored by the at least one local server (20).

4. The method of claim 3 , wherein the digital content includes images relating to the event, and wherein the comparing comprises executing an image processing algorithm to compare the local data with the images.

5. Method according to claim 3 or 4, characterized in that the local data stored by said at least one local server (20) are of GEOINT and / or OSINT type.

6. The method according to any one of claims 1 to 5, wherein during said sending step (S5), a notification (REQ) of geographical location information is sent to all communication terminals (T1', T2') located within a predefined area in the vicinity of said event (EV).

7. The verification step (S6), - visualizing said digital content by a user on the interface of one of said communication terminals (T1', T2') located within said defined area in the vicinity of said event (EV); The method of claim 6, further comprising: - interacting with the user and the communication terminal (T1', T2') and activating the digital content if the digital content corresponds to an event perceived by the user on the area.

8. The method of claim 7, wherein the notification (REQ) includes a request to the communication terminals (T1', T2') located in the predetermined area proximate to the event (EV) to capture another digital content including the event (EV).

9. 9. The method according to claim 8, wherein upon receiving the request (REQ), at least one of the communication terminals (T1', T2') located in the area captures another digital content including the event (EV) and generates a third-party multimedia file, which is then passed through steps b), c) and d) of the method to the central server (10) to restore at least one certified third-party multimedia file (FC1').

10. The method of claim 9, wherein the central server (10) associates (S7) the at least one certified third-party multimedia file (FC1') with the certified multimedia file (FC1) to create a verified multimedia file (FV1) accessible from all communication terminals (T3) connected to the central server (10).

11. A method according to claim 10, comprising creating, by at least another set of communication terminals (T2, T2'), at least one other verified multimedia file (FV2) relating to the same event (EV).

12. 12. The method according to claim 11, wherein said verified multimedia file (FV1) and said at least one other verified multimedia file (FV2) are recorded on said central server (10).

13. The method of claim 12, wherein metadata (M1, M2) of the certified multimedia file (FC1, FC2) and the certified third-party multimedia file (FC1', FC2') present in the verified multimedia file (FV1) and the at least one other verified multimedia file (FV2) are compared with each other (S8).

14. 14. The method according to claim 13, further comprising creating (S9) an authenticated event (EA) associating the verified multimedia file (FV1) with the at least one other verified multimedia file (FV2) if there is a similarity between the metadata (M1, M2), the authenticated event (EA) being accessible from all communication terminals (T3) connected to the central server (10).

15. The method according to at least claim 11 or claim 15, wherein the central server (10) generates an interactive map, an automatically generated video or a 3D rendering of the event (EV) allowing to refer to the certified multimedia files (FC1, FC1', FC2, FC2'), the verified multimedia files (FV1, FV2) and / or the authenticated event (EA) according to the information regarding the location of the event contained in the metadata.

16. A method according to any one of claims 1 to 15, wherein the metadata comprises at least some of the following information: time, date, location, altitude, movement, path taken, speed of movement, direction of view, audio, nature of the photo or video or other content, time of capture, type of communication terminal, creator and description.

17. The method according to any one of the preceding claims, wherein said region is determined by a separation distance to said event (EV) between 0 and 100 metres, preferably substantially including 50 metres.

18. A computer program comprising instructions for carrying out the method according to any one of claims 1 to 17, when said instructions are executed by a processor.

19. A computer readable recording medium having recorded thereon a computer program comprising instructions for carrying out the steps of the method according to any one of claims 1 to 18.

20. A system (100) for controlling digital content relating to an event (EV), the system (100) comprising at least one communication terminal (T1, T2) and a management server (10), and the communication terminal (T1, T2) - a camera (21) configured to capture digital content including the event; - a processing unit (22) adapted to generate a computer file, a so-called multimedia file; wherein said processing unit (22) is adapted to recover metadata (M1, M2) generated by said communication terminals (T1, T2) during said capture and to process said multimedia files by assigning said generated metadata (M1, M2) to said multimedia content to create a digital fingerprint for authenticating said multimedia files (F1, F2); and - communication means (23) adapted to transmit said certified multimedia file to said central server (10); wherein the central server (10) is configured, after receiving the certified multimedia file (FC1, FC2), to send a notification (REQ) of geographical location information to at least one local computer entity (T1', T2', 20) to request the at least one local computer entity (T1', T2', 20) to verify (S6) the certified multimedia file (FC1, FC2) by validating the digital content of the certified multimedia file (FC1, FC2); The system (100).

21. A system (100) according to claim 20, comprising computer means adapted to carry out the steps of the method according to any one of claims 2 to 17.

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