Hotel access control management method and system

Abstract

The invention discloses a hotel access control management method and system, and the method comprises the steps: issuing an identity card fingerprint obtaining instruction and an identity card information obtaining instruction when an identity card-based unlocking instruction of a first user is received; receiving an identity card fingerprint feature template and first identity information; comparing the first identity information with pre-stored identity information, and if the comparison succeeds, executing the next step; first finger fingerprint image information of a first user is received, feature extraction is conducted on the first finger fingerprint image information, the first finger fingerprint image information is compared with the identity card fingerprint information, and if the first finger fingerprint image information is consistent with the identity card fingerprint information, an unlocking instruction is issued to an unlocking execution mechanism; and when an unlocking instruction based on the fingerprints of a second user is received, acquiring second fingerprint image information for feature extraction, comparing the second fingerprint image information with a plurality of pre-stored finger feature templates, and issuing an unlocking instruction to the unlocking mechanism if the comparison succeeds. According to the invention, the security is improved, and the check-in convenience of the hotel tenant is improved.

Description

Technical Field

[0001] The present application relates to the field of security technology, and in particular to a hotel access control management method and system. Background Art

[0002] With the development of science and technology, the trend of using fingerprints for access control verification is becoming increasingly obvious. Fingerprint recognition technology provides a highly secure means of identity verification. Since everyone's fingerprint is unique, the non-replicability of this biometric feature makes the fingerprint access control system an effective barrier to prevent unauthorized access. Secondly, the operation of the fingerprint recognition access control system is very convenient. Users only need to place their fingers on the scanner to quickly complete the verification. There is no need to carry keys or remember complex passwords, which improves the user's access efficiency.

[0003] The publication number CN106023368A "A Method and System for Access Control Unlocking" mentions that after obtaining fingerprint information through a mobile terminal, it is matched with the pre-stored user fingerprint information. If the match is successful, the access control is unlocked. This method is used in hotels to ensure security to a great extent, but for hotel tenants with high mobility, fingerprint collection is required in advance when checking in. The collection process of pre-stored fingerprints is to ensure that it can accurately match the real-time collected fingerprints under various circumstances. Therefore, there are higher requirements for the quality of the fingerprint image, and the user is required to press the fingerprint collection device multiple times when registering to ensure that the system can capture a clear and complete fingerprint image. Therefore, when hotel customers register, the process of pre-storing fingerprints is relatively complicated, which increases the inconvenience of hotel tenants checking in.

[0004] However, in order to increase the convenience of hotel tenants to check in, some hotels obtain identity information in advance, and then compare the information of the ID card with the pre-acquired identity information. If the comparison is successful, the door lock is opened. For example, the publication number CN109410091A "Identity Verification Method and Device" mentions whether the identity certificate information matches the pre-saved reservation accommodation information. If it matches, a successful match notification message is sent to control the opening of the door lock. In this way, if the tenant's ID card is lost, some people can use the tenant's lost ID card to open the door lock, which increases security risks. Summary of the invention

[0005] Based on this, in response to the above technical problems, a hotel access control management method and system are provided to solve the problems of inconvenience or low security when hotel tenants check in in the prior art.

[0006] In a first aspect, a hotel access control management method is provided, the method comprising:

[0007] When receiving an unlocking instruction based on the ID card of the first user, issuing an ID card fingerprint acquisition instruction and an ID card information acquisition instruction;

[0008] Receive the ID card fingerprint feature template and the first identity information; compare the first identity information with the pre-stored identity information, and if the comparison is successful, execute the next step;

[0009] Receive the first finger fingerprint image information of the first user, convert the first finger fingerprint image information into a first finger fingerprint feature template and compare it with the ID card fingerprint feature template. If they are consistent, send an unlocking instruction to the unlocking execution mechanism;

[0010] When an unlocking instruction based on a finger fingerprint of the second user is received, the second finger fingerprint image information is obtained and converted into a second fingerprint feature template, and compared with multiple pre-stored finger fingerprint image feature templates. If the comparison is successful, an unlocking instruction is sent to the unlocking mechanism.

[0011] In the above solution, optionally, the comparing the first identity information with the pre-stored identity information, if the comparing is successful, further comprises: outputting a first finger fingerprint image collection prompt information.

[0012] In the above scheme, optionally, the first finger fingerprint feature template is compared with the ID card fingerprint feature template, and the second fingerprint feature template is compared with multiple pre-stored finger fingerprint image feature templates by calculating the similarity of the fingerprint feature templates. If the similarity value exceeds a certain threshold, the comparison is considered successful.

[0013] In the above solution, optionally, the first identity information is compared with the pre-stored identity information, and if the comparison fails, an unlocking failure prompt message is output;

[0014] The fingerprint feature template of the first finger is compared with the fingerprint feature template of the ID card, and if they are inconsistent, an unlocking failure prompt message is output;

[0015] The second fingerprint feature template is compared with a plurality of pre-stored finger fingerprint image feature templates. If the comparison is unsuccessful, an unlocking failure prompt message is output.

[0016] In the above solution, optionally, the method further comprises: when receiving an instruction to delete the pre-stored first user identity information, sending a randomly generated first verification code to the mobile terminal;

[0017] In response to the received second verification code, the first verification code is compared with the second verification code, and if the comparison is successful, the first user identity information is deleted.

[0018] In the above solution, optionally, the identity information includes: ID number and name.

[0019] In the above scheme, optionally, the method also includes: comparing the first identity information with the pre-stored identity information, and if the comparison fails for more than a set number of consecutive times, outputting a warning message to the mobile terminal; comparing the first finger fingerprint feature template with the ID card fingerprint feature template, and if the comparison fails for more than a set number of consecutive times, outputting a warning message to the mobile terminal; comparing the second fingerprint feature template with multiple pre-stored finger fingerprint image feature templates, and if the comparison fails for more than a set number of consecutive times, outputting a warning message to the mobile terminal.

[0020] In a second aspect, a hotel access control management system is provided, the system comprising:

[0021] ID card fingerprint and ID card information acquisition instruction module: used to issue ID card fingerprint acquisition instructions and ID card information acquisition instructions when receiving an unlocking instruction based on the ID card of the first user;

[0022] Identity information comparison module: used to receive the ID card fingerprint feature template and the first identity information; compare the first identity information with the pre-stored identity information, and if the comparison is successful, execute the ID card fingerprint information comparison module;

[0023] ID card fingerprint information comparison module: used to receive the user's first finger fingerprint image information, compare the first finger fingerprint image information with the ID card fingerprint information, and if they are consistent, send an unlocking instruction to the unlocking execution mechanism;

[0024] Fingerprint information comparison module: when receiving an unlocking instruction based on the finger fingerprint of the second user, it is used to obtain the second finger fingerprint image information and convert it into a second fingerprint feature template, and compare it with multiple pre-stored finger fingerprint image feature templates. If the comparison is successful, an unlocking instruction is issued to the unlocking mechanism.

[0025] In a third aspect, a computer device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the hotel access control management method described in the first aspect are implemented.

[0026] In a fourth aspect, a computer program product includes a computer program / instruction, which, when executed by a processor, implements the steps of a hotel access control management method described in the first aspect.

[0027] This application has at least the following beneficial effects:

[0028] This application pre-stores the identity information of the first user of the hotel tenant with greater mobility when checking in. When unlocking, the identity information of the ID card is first obtained and compared with the pre-stored identity information. If the comparison is successful, the fingerprint information of the ID card is obtained and compared with the finger fingerprint information of the first user collected in real time to ensure that the user holding the ID card is the person himself, thereby ensuring that there is no situation of stealing other people's ID cards to unlock the door lock. Greatly increase security. At the same time, only identity information needs to be pre-stored when checking in, which improves the convenience of check-in. For the second user of the hotel manager with less mobility, the fingerprint information is pre-stored. When unlocking, the fingerprint information of the finger collected in real time is compared with the pre-stored fingerprint information. If the comparison is successful, unlocking is performed. Since the mobility of hotel managers is weak, the pre-stored fingerprints can be used for a long time. By using the pre-stored fingerprints for comparison and unlocking, security can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A flowchart of a hotel access control management method is provided for an embodiment of the present application;

[0030] Figure 2 A scenario diagram based on a 1:1 comparison of ID card fingerprint information and finger fingerprint information provided in one embodiment of the present application;

[0031] Figure 3 A scenario diagram based on a 1:N comparison of a finger fingerprint with multiple pre-stored finger fingerprints is provided for one embodiment of the present application. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0033] In the description of this application: unless otherwise specified, the meaning of "plurality" is two or more. The terms "first", "second", "third", etc. in this application are intended to distinguish the objects referred to, and do not have special meanings in terms of technical connotations (for example, they should not be understood as emphasizing the importance or order, etc.). Expressions such as "including", "comprising", "having", etc. also mean "not limited to" (certain units, components, materials, steps, etc.).

[0034] In one embodiment, Figure 1 As shown, a hotel access control management method is provided, the method comprising:

[0035] Step S1: When receiving an unlocking instruction based on the ID card of the first user, an ID card fingerprint acquisition instruction and an ID card information acquisition instruction are issued.

[0036] Step S2: receiving the ID card fingerprint feature template and the first identity information; comparing the first identity information with the pre-stored identity information, and if the comparison is successful, executing the next step.

[0037] In step S2, the pre-stored identity information can be directly obtained by identifying the identity card for storage, and of course the identity information can be manually input for storage.

[0038] Step S3: receiving the first finger fingerprint image information of the first user, converting the first finger fingerprint image information into a first finger fingerprint feature template and comparing it with the ID card fingerprint feature template. If they are consistent, sending an unlocking command to the unlocking execution mechanism.

[0039] In step S3, after the identity information is compared, the fingerprint image information of the first user is obtained, and then the fingerprint information is compared. If successful, the door lock is unlocked. The first user is generally facing the tenant of the hotel. When unlocking, the user needs to show both the ID card and the fingerprint to unlock. Figure 2 The figure shows a scenario of a 1:1 comparison between the ID card fingerprint information and the finger fingerprint information.

[0040] Step S4: When receiving the unlocking instruction based on the fingerprint of the second user, the second fingerprint image information is obtained and converted into a second fingerprint feature template, and compared with the pre-stored multiple fingerprint image feature templates. If the comparison is successful, the unlocking instruction is sent to the unlocking mechanism. Figure 3 As shown, it is a scene diagram of performing a 1:N comparison between a finger fingerprint and multiple pre-stored finger fingerprints.

[0041] In step S4, the second user is generally a manager of a hotel, and the pre-stored fingerprints may not be changed for a long time because of the nature of the work, so a long-term comparison can be performed. When opening the door lock, only the fingerprint of the finger can be opened.

[0042] Therefore, this application supports both 1:1 matching of ID card fingerprints and 1:N attendance / access control fingerprint storage and matching.

[0043] The standard fingerprint module captures 256*360 pixels. A thumb fingerprint image is about 92KB. The fingerprint collection and verification algorithm requires about 100KB RAM, which requires a total of 192KB RAM. Considering that a certain margin must be left for the memory, an MCU with 256KB RAM is required; according to the calculation of 512 bytes (0.5KB) per fingerprint template, 0.5KB*1500=750KB is required to store 1500 fingerprints. The fingerprint module firmware is about 500KB. Considering the storage capacity scalability of the fingerprint template and the online firmware update, a certain margin must be left for Flash, so a large-capacity FLASH MCU chip is required. Taking into account the RAM and FLASH storage capacity requirements, as well as the floating-point operation, DSP instruction processing and encryption requirements for fingerprint image processing, the CCM4201S_L MCU with 256KBRAM and 2048KB FLASH is selected to meet the fingerprint module image acquisition, preprocessing, verification algorithm operation and fingerprint template storage requirements.

[0044] Therefore, this fingerprint module can collect and store 1,500 fingerprint templates, and uses the SM4 domestic encryption algorithm to encrypt and store fingerprint templates to prevent criminals from maliciously tampering with fingerprint templates of important access control equipment. The same fingerprint module can be used for both personnel and ID card fingerprint verification and attendance / access control fingerprint verification, which can meet the customer's multi-scenario application needs of the whole machine, reduce customer usage costs, and enhance the security of fingerprint verification equipment.

[0045] It should be understood that although Figure 1 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. Moreover, Figure 1 At least part of the steps may include multiple steps or multiple stages. These steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed in turn or alternately with other steps or at least part of the steps or stages in other steps.

[0046] In the above-mentioned hotel access control management method, for the first user of the hotel tenant with greater mobility, the user's identity information is pre-stored when checking in. When unlocking, the identity information of the ID card is first obtained and compared with the pre-stored identity information. If the comparison is successful, the fingerprint information of the ID card is obtained and compared with the finger fingerprint information of the first user collected in real time, ensuring that the user holding the ID card is the user himself, thereby ensuring that there is no situation of stealing other people's ID cards to unlock the door lock. Greatly increase security. At the same time, only identity information needs to be pre-stored when checking in, which improves the convenience of check-in. For the second user of the hotel manager with less mobility, the fingerprint information is pre-stored. When unlocking, the fingerprint information of the finger collected in real time is compared with the pre-stored fingerprint information. If the comparison is successful, unlocking is performed. Since the mobility of hotel managers is weak, the pre-stored fingerprints can be used for a long time. By using the pre-stored fingerprints for comparison and unlocking, security can be improved.

[0047] In one embodiment, the comparing the first identity information with the pre-stored identity information, if the comparing is successful, further comprises: outputting a first finger fingerprint image collection prompt information.

[0048] In this embodiment, generally speaking, the user needs to place the ID card and finger fingerprint at the same time in the corresponding area to unlock. After the system successfully matches the identity information, if the image information of the first finger fingerprint cannot be obtained, it can output the first finger fingerprint image collection prompt information to remind the user to place the finger in the designated area in time to obtain the finger fingerprint image information for unlocking.

[0049] In one embodiment, the first finger fingerprint feature template is compared with the ID card fingerprint feature template, and the second fingerprint feature template is compared with multiple pre-stored finger fingerprint image feature templates by calculating the similarity of the fingerprint feature templates. If the similarity value exceeds a certain threshold, the comparison is considered successful.

[0050] In this embodiment, that is, when the first user inputs an unlocking instruction based on the ID card, the fingerprint comparison is performed, including: after receiving the ID card fingerprint feature template, after receiving the user's first finger fingerprint image information, extracting the features of the first finger fingerprint image and converting the extracted first finger fingerprint features into the first finger fingerprint feature template; calculating the similarity between the ID card feature template and the first finger fingerprint feature template, if the similarity value exceeds the preset threshold, the comparison is successful.

[0051] When the second user inputs a plurality of pre-collected and pre-stored finger fingerprint images, the features of the finger fingerprints are extracted and converted into a fingerprint feature template for storage; after receiving the second finger fingerprint image information, the features of the second finger fingerprint image are extracted and the extracted second finger fingerprint features are converted into a second finger fingerprint feature template; the pre-stored finger fingerprint feature template and the second finger fingerprint feature template are similarly calculated, and if the similarity value exceeds a preset threshold, the comparison is successful.

[0052] In one embodiment, the first identity information is compared with the pre-stored identity information, and if the comparison fails, an unlocking failure prompt message is output;

[0053] The fingerprint feature template of the first finger is compared with the fingerprint feature template of the ID card, and if they are inconsistent, an unlocking failure prompt message is output;

[0054] The second fingerprint feature template is compared with a plurality of pre-stored finger fingerprint image feature templates. If the comparison is unsuccessful, an unlocking failure prompt message is output.

[0055] In one embodiment, the method further comprises: when receiving an instruction to delete the pre-stored first user identity information, sending a randomly generated first verification code to the mobile terminal;

[0056] In response to the received second verification code, the first verification code is compared with the second verification code, and if the comparison is successful, the first user identity information is deleted.

[0057] In this implementation, if the hotel manager resigns and an instruction is issued to delete the pre-stored second finger fingerprint image information, a verification code is sent to the mobile terminal (host computer) that communicates with it, the verification code is entered through the user terminal, and compared with the sent verification code. If they are consistent, the deletion operation is executed to ensure that the deletion operation is agreed to by the hotel.

[0058] In one embodiment, the identity information includes: ID number and name.

[0059] In one embodiment, the method further comprises: comparing the first identity information with pre-stored identity information, and if the comparison fails for more than a set number of consecutive times, outputting a warning message to the mobile terminal;

[0060] Compare the fingerprint feature template of the first finger with the fingerprint feature template of the ID card, and if the comparison fails for more than a set number of consecutive times, output a warning message to the mobile terminal;

[0061] The second fingerprint feature template is compared with a plurality of pre-stored finger fingerprint image feature templates. If the comparison fails for more than a set number of consecutive times, a warning message is output to the mobile terminal.

[0062] In this embodiment, if the comparison fails for multiple times in a row, an early warning message is sent to the mobile terminal (host computer) to alert the staff of an emergency.

[0063] In one embodiment, a hotel access control management system is provided, the system comprising:

[0064] ID card fingerprint and ID card information acquisition instruction module: used to issue ID card fingerprint acquisition instructions and ID card information acquisition instructions when receiving an unlocking instruction based on the ID card of the first user;

[0065] Identity information comparison module: used to receive the ID card fingerprint feature template and the first identity information; compare the first identity information with the pre-stored identity information, and if the comparison is successful, execute the ID card fingerprint information comparison module;

[0066] ID card fingerprint information comparison module: used to receive the user's first finger fingerprint image information, compare the first finger fingerprint image information with the ID card fingerprint information, and if they are consistent, send an unlocking instruction to the unlocking execution mechanism;

[0067] Fingerprint information comparison module: when receiving an unlocking instruction based on the finger fingerprint of the second user, it is used to obtain the second finger fingerprint image information and convert it into a second fingerprint feature template, and compare it with multiple pre-stored finger fingerprint image feature templates. If the comparison is successful, an unlocking instruction is issued to the unlocking mechanism.

[0068] For the specific definition of a hotel access control management system, please refer to the definition of a hotel access control management method above, which will not be repeated here. Each module in the above-mentioned hotel access control management system can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory in the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0069] In one embodiment, a computer device is provided, which may be a server. The computer device includes a processor, a memory, and a network interface connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, the above-mentioned hotel access control management method is implemented.

[0070] In one embodiment, a computer program product is also provided, including a computer program / instruction, which involves all or part of the process in the above embodiment method.

[0071] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory can include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0072] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A hotel access control management method, characterized in that: The method comprises: When receiving an unlocking instruction based on the ID card of the first user, issuing an ID card fingerprint acquisition instruction and an ID card information acquisition instruction; Receive the ID card fingerprint feature template and the first identity information; compare the first identity information with the pre-stored identity information, and if the comparison is successful, execute the next step; Receive the first finger fingerprint image information of the first user, convert the first finger fingerprint image information into a first finger fingerprint feature template and compare it with the ID card fingerprint feature template, if they are consistent, send an unlocking instruction to the unlocking execution mechanism; When an unlocking instruction based on a finger fingerprint of the second user is received, the second finger fingerprint image information is obtained and converted into a second fingerprint feature template, and compared with multiple pre-stored finger fingerprint image feature templates. If the comparison is successful, an unlocking instruction is sent to the unlocking mechanism.

2. The hotel access control management method according to claim 1, characterized in that: The first identity information is compared with the pre-stored identity information, and if the comparison is successful, the method further includes: outputting a first finger fingerprint image collection prompt information.

3. The hotel access control management method according to claim 1, characterized in that: The first finger fingerprint feature template is compared with the ID card fingerprint feature template, and the second fingerprint feature template is compared with multiple pre-stored finger fingerprint image feature templates by calculating the similarity of the fingerprint feature templates. If the similarity value exceeds a certain threshold, the comparison is considered successful.

4. The hotel access control management method according to claim 1, characterized in that: The first identity information is compared with the pre-stored identity information, and if the comparison fails, an unlocking failure prompt message is output; The fingerprint feature template of the first finger is compared with the fingerprint feature template of the ID card, and if they are inconsistent, an unlocking failure prompt message is output; The second fingerprint feature template is compared with a plurality of pre-stored finger fingerprint image feature templates. If the comparison is unsuccessful, an unlocking failure prompt message is output.

5. The hotel access control management method according to claim 1, characterized in that: The method further comprises: when receiving an instruction to delete the pre-stored first user identity information, sending a randomly generated first verification code to the mobile terminal; In response to the received second verification code, the first verification code is compared with the second verification code, and if the comparison is successful, the first user identity information is deleted.

6. The hotel access control management method according to claim 1, characterized in that: The identity information includes: ID number and name.

7. The hotel access control management method according to claim 1, characterized in that: The method further includes: comparing the first identity information with pre-stored identity information, and if the comparison fails for more than a set number of consecutive times, outputting a warning message to the mobile terminal; Compare the fingerprint feature template of the first finger with the fingerprint feature template of the ID card, and if the comparison fails for more than a set number of consecutive times, output a warning message to the mobile terminal; The second fingerprint feature template is compared with a plurality of pre-stored finger fingerprint image feature templates. If the comparison fails for more than a set number of consecutive times, a warning message is output to the mobile terminal.

8. A hotel access control management system, characterized in that: The system comprises: ID card fingerprint and ID card information acquisition instruction module: used to issue an ID card fingerprint acquisition instruction and an ID card information acquisition instruction when receiving an unlock instruction based on the ID card of the first user; Identity information comparison module: used to receive the ID card fingerprint feature template and the first identity information; compare the first identity information with the pre-stored identity information, and if the comparison is successful, execute the ID card fingerprint information comparison module; ID card fingerprint information comparison module: used to receive the user's first finger fingerprint image information, compare the first finger fingerprint image information with the ID card fingerprint information, and if they are consistent, send an unlocking instruction to the unlocking execution mechanism; Fingerprint information comparison module: when receiving an unlocking instruction based on the finger fingerprint of the second user, it is used to obtain the second finger fingerprint image information and convert it into a second fingerprint feature template, and compare it with multiple pre-stored finger fingerprint image feature templates. If the comparison is successful, an unlocking instruction is issued to the unlocking mechanism.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 7 are implemented.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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