78 results about "Signature Code" patented technology

A proximity measuring apparatus (70) comprises an interrogator (80) for generating an interrogation signal encoded with a reference signature code comprising concatenated codes and emitting it as interrogating radiation. It also incorporates a transponder (90) for receiving the interrogating radiation, demodulating it to extract its signature code and then remodulating it after a delay period to provide a signal for reemission as return radiation therefrom. The interrogator (80) receives return radiation at its antenna (260) and demodulates it to extract its signature code and then correlates the code with the reference code to determine mutual correlation thereof. The interrogator (80) incorporates a computer (290) for controlling a scan direction of the antenna (260) and for measuring time delay between emission of the interrogating radiation therefrom and receipt of corresponding return radiation. The computer (290) computes distance and relative bearing of a transponder (90) providing the return radiation from the scan direction and the time delay. The apparatus (70) may be used for improving road vehicle safety.

A method includes receiving at least two space-time coded signals from an antenna system associated with a first station, determining complex channel state information based on the received space-time coded signals, and sending the complex channel state information to the first station. In an alternative embodiment, a method includes transmitting at least two space-time coded signals in respective beams of a multi-beam antenna array, measuring a channel impulse response for each space-time coded signal at a second station, and sending an indicia of a selected set of least attenuated signals from the second station to the first station. The multi-beam antenna array is associated with a first station. The beams transmit a signature code embedded in each respective space-time coded signal, and the signature codes are orthogonal so that the second station can separate and measure the channel impulse response corresponding to each space-time coded signal.

A method includes receiving at least two space-time coded signals from an antenna system associated with a first station, determining complex channel state information based on the received space-time coded signals, and sending the complex channel state information to the first station. In an alternative embodiment, a method includes transmitting at least two space-time coded signals in respective beams of a multi-beam antenna array, measuring a channel impulse response for each space-time coded signal at a second station, and sending an indicia of a selected set of least attenuated signals from the second station to the first station. The multi-beam antenna array is associated with a first station. The beams transmit a signature code embedded in each respective space-time coded signal, and the signature codes are orthogonal so that the second station can separate and measure the channel impulse response corresponding to each space-time coded signal.

The invention relates to static webpage anti-tampering system and method based on digital signatures. The system comprises a server side and a client side, wherein the server side comprises a server and a server side signing assembly, and the client side comprises a browser and a client verifying assembly. The server side signing assembly realizes the full page signature of a webpage code sent out by the server side and transmits a signature code obtained by signing together with the webpage code to the browser of the client side, and when the webpage code is downloaded to the client side, the client verifying assembly is activated and extracts a webpage plain text and the signature code of the server side for verification. The static webpage anti-tampering system and method based on digital signatures can solve the problems that the present webpage can not be effectively utilized and may be illegally tampered, and can be matched with a client side digital signing assembly to realize a protection function on the transmission from the server side to the client side and from the client side to the server side.

The invention belongs to the technical field of mobile payment, and discloses an offline payment method based on NFC. The method includes steps: S1, a payment terminal receives a collection instruction sent by a collection terminal; S2, the payment terminal generates a first verification code and a first authentication signature code, and sends the first verification code, the first authentication signature code and a payment terminal identity authentication instruction to the collection terminal; S3, the payment terminal receives a second verification code, a second authentication signature code, and an update electronic wallet balance instruction which are generated after signature verification and deduction of the payment terminal by the collection terminal; S4, the payment terminal performs signature verification on the collection terminal, and the corresponding amount is added to an electronic wallet based on the received update wallet balance instruction; and S5, the payment terminal generates a third verification code and a third authentication signature code, and sends the third verification code, the third authentication signature code, and a payment success instruction to the collection terminal so that the collection terminal can perform signature verification. According to the method, non-network payment and data exchange between two terminals can be realized.

The invention provides a random access collision retreat method, comprising: the step S102, classifying service of triggering the random access operation, and distributing threshold values to the classified service, performing random access operation according to the threshold values by user terminals, wherein the step S104 comprises: the step S104a, the user terminals generates random number, and compares the random number with the threshold values, and the step S104b, the user terminals randomly select a signature code from available random access signature code aggregate and transmit to the network side to perform random access operation, when the comparing result of the random number and the threshold values satisfies the scheduled requirement; when the comparing result of the random number and the threshold values does not satisfy the scheduled requirement, returning to the step S104a.

The invention relates to a method for proofing false certificates based on a lightweight level digital signature scheme, which belongs to the cryptography and the computer field, the method enables the unforgeability of the certificates to be corresponding to the safety of a public key digital signature scheme and comprises the three parts of a key generating part of certificate forgery, a digital signature part and an identification checking part, wherein the key generating part is used for generating a pair of a private key and a public key of a license-issuing authority, the digital signature part is used for generating signature codes to the Hash abstract of key information of the certificates for the license-issuing authority, the identification checking part is used for identifying authenticity of the certificates for a user end inquiry unit, the method is safe and has low cost, can prevent insiders of the license-issuing authority commit a crime, can replace official seals of companies and can widely used in distributing business of various certificates.

A system for watermarking an image file selects coefficients using a selection procedure that is kept secret, and assigns the selected coefficients to coefficient pairs. The difference between the coefficients of the pairs is then used to generate multi-bit raw signature values that characterize the authentic image at different locations. To detect an unauthorized alteration after the image file has been watermarked, coefficient pairs are selected using the same secret procedure that was originally used to generate the raw signature values. The difference between the coefficients of the pairs is then checked against the raw signature values derived from the original image file. The raw signature values derived from the authentic image file may be placed in the header of the file or in a separate file. Alternatively, they may be embedded in host coefficients that are selected in accordance with a procedure that is kept secret. To reduce the risk of false alarms, more than one raw signature value may be accepted for certain difference ranges of the difference between coefficients of the pairs. Furthermore, the raw signature values may be grouped into sets, which are mapped onto shortened signature codes having a reduced number of bits. The assignment of sets of raw signature values to the shortened signature codes may be based on the probability of the sets of raw signature values.

A method for establishing a communication channel between a host device and a memory device including a Flash memory includes: detecting at least one content that is transmitted from the host device to the memory device; and when it is detected that any content that the host device writes into a file after opening the file is at least one predetermined signature code, determining the communication channel to be established, and processing at least one portion of information that the host device writes into the file after sending the predetermined signature code by regarding the at least one portion of the information as communication contents that the host device sends to the memory device through the communication channel until the communication channel is canceled. An associated memory device and a controller thereof, and an associated host device and an associated host device application are also provided.

Methods and systems for facilitating secure payments are described. A user signature is shared with a merchant without providing an actual signature to the merchant. A signature code encoded with a user's handwritten signature is generated and presented to a merchant upon request for signature. The signature code is scanned by the merchant, and data in the signature code is transmitted to a service provider. The service provider receives the data and retrieves the signature. The signature code can be used at a retail location during checkout, during delivery of merchandise, or for acknowledgement of mail delivery.

An electronic display device provides closed-loop verification that specific content has been displayed by the display device. When desired digital image content is rendered as an image or video by the electronic display device, a confirmation signal is generated by one or more components of the display device to verify that the image content has been successfully displayed. The confirmation signal may include performance measurements of the one or more components of the display device and/or a signature output that is associated with a signature code embedded in the image content. The signature output uniquely identifies the digital image content.

The invention discloses a method for verifying contents on the basis of digital signature codes. The method includes a signing step: signing a first digital content by the aid of a first private key to generate a first digital signature and a first signature code which correspond to the first digital content; a double-signature step: verifying the first digital signature according to the first signature code, and signing the first digital content again by the aid of a second private key according to the first signature code to generate a corresponding second digital signature and a corresponding second signature code; a verifying step: verifying at least one component of a digital signature group according to at least one component of a signature code group. The first signature code and the second signature code are connected with each other and form the signature code group, and the first digital signature and the second digital signature form the digital signature group. The method has the advantage that the authenticity of the signed digital content can be conveniently confirmed by the aid of the method.

The invention provides an eID film card, a mobile terminal device and an eID authentication system. The eID film card comprises: an eID application module for storing eID information and a target signature code corresponding to the eID information. The eID application module prompts the input of a signature code to be verified when receiving a signature instruction, compares the input signature code to be verified with the target signature code, and assembles the signature according to the eID information when the input signature code to be verified matches the target signature code. The eID film card also comprises a communication protocol module electrically connected to the eID application module for information interaction between the eID application module and an external device structure. The eID film card provided by the invention stores the eID information in the eID film card, and the eID film card can be installed in the mobile terminal after being seamlessly attached to theSIM card. When a user performs identity authentication on the mobile terminal, the eID information can be used for authentication, and the user information such as ID number or mobile phone number isnot involved, which can effectively prevent the leakage of user information.

The method utilizes the level function, super logarithm aporia, twin coresidual theorem to design a public secret key digital signature method. The method consists of key generation, digit signature and ID verification. The user holds two keys, i.e. a private key and a public key. There is no way to derive the private key from the public key. The private key is used to generate the signature code of the document or the message. The public key is used to verify the signature code of the document or the message. This method can prevent attack from existed analysis means effectively. The method can be used for any signature and verification of document and data in computer and comm. network and for ID appraisal or content validation in the electronic government affairs and the electronic business.

The invention relates to the technical field of block chains, and discloses an authorization management method and system, equipment and a computer readable storage medium. The authorization management method comprises the steps that a first node signs a second public key through a first private key to obtain a first signature code, then the first signature code is subjected to signature verification through the first public key, and when the signature verification is passed, the second public key is added to an authorization list; and the second node signs the second encrypted data through asecond private key to obtain a second signature code, then the second signature code is verified based on the authorization list, and when the second signature code passes the signature verification,the second encrypted data is released to the block chain. Through the method and the device, the owner of the data grants the authority of modifying the data to the authorized party on the basis thatthe owner of the data does not provide the private key to the authorized party, so that the owner of the data always keeps the absolute control authority of the data, and the data security is improved.

A roaming authentication method for a GSM system is disclosed. The method sends an IMSI of a user end to a visitor end, generates a challenge code, and sends the IMSI and the challenge code to a home end. The method further generates a random code, a signature code and a communication key and combines them into an authentication data. The method further generates and sends a response code to the visitor end. The user end generates and sends the authentication signature code to the visitor end for authentication purposes. In another embodiment, the visitor end sends one more challenge code to the home end. The home end generates an authentication key that is stored in the visitor end and used to generate an authentication code. The authentication code is sent to the use end which generates and sends an authentication signature code to the visitor end for authentication purposes.

The invention discloses a remote towboat fault diagnosis system, which comprises an integrated antenna with a satellite signal receiving function, a GPS (Global Position System) for acquiring a current towboat position, a fixed buoy arranged on an operation sea area of a towboat and provided with a radar responder, an airborne-radar for sea search arranged on the towboat, a central processing unit, a fault detection system in communication connection with a ship bus, a fault detection unit communicated with the bus, and a sound acquisition unit for acquiring sound characteristics of engine operation, wherein the airborne-radar for sea search is used for transmitting a radar wave, receiving a back wave of the radar responder and acquiring an own position; the central processing unit is used for receiving current towboat position information acquired by the GPS and a return position signal of the airborne-radar for sea search and calculating the current towboat position; the fault detection system is used for acquiring a fault signature code of the current ship through the bus; meanwhile, through the fault detection unit and the sound acquisition unit, a remote center can master the operation state of the towboat in real time. The adopted technology is mature and reliable, so that the remote towboat fault diagnosis system is very applicable to be popularized and applied in large area.

The invention belongs to the cryptography and the computer science. A public key digital signature method is worked out based on a non-uniform super increasing sequence and super logarithm puzzles comprising a key generation part, a digital signature part and an authentication part; the user has two keys, that is a private key and a public key, and the private key is not calculated from the public key; the private key is used for generating a signature code of a file or a message, the public key is used for authenticating the signature code of the file or the message. The method of the invention can effectively defend against the attack of the prior analysis means and be suitable for the signature and the authentication of any files in the computer and communication network, the personal identification and the content confirmation in the e-government and the e-commerce and the authentication and the anti-counterfeiting of the finance bills and relative certificates in the real world.

In a method for providing physical documents with a signature, a document code is derived from at least a part of a content of the physical document. A signature code is derived at least from the document code and from an identification code of a signing party. The physical document is provided with a signature marking representing the signature code. Optionally, the physical document is provided with a document marking representing the document code. A signature provided on a physical document may be authenticated. During authentication, a signature marking provided on the physical document is detected. The signature marking represents a signature code. Then, the signature code is derived from the detected signature marking. Content data representing at least a part of the content of the physical document is received and a first document code is derived from the content data. Then, a relationship between the signature code, an identification code of a signing party and the first document code is determined. The signature is validated in case the relationship satisfies a validation criterion.

The invention discloses a document circulation monitoring method and system. The monitoring method comprises: respectively signing for an intermediate user and a device during the flow of the document, generating a single signature code related to the user and the device, and generating a single signature code, adding a respective signiature code into the flow transcoding process of the document,performing aggregation signature according to the document flow transcoding and decoding protocol by a receiver of the flow process, adopting an aggregation signature mode so that a user and a deviceof the receiver acquires the authority of monitoring the document and determining user and device information in the process of document flow and sending user and device information in the process ofdocument flow into the user and the device of the receiver. The single-signature process and the aggregated signature of the present invention not only restrict the users of the document circulation process, but also constrain the device using the official document to ensure that the designated user can operate the official document on the designated device, thereby realizing the process of document circulation. The users and devices in the middle channel are monitored.

The invention discloses a security verification method for a household edge computing system, and the method comprises the steps: constructing a verification cloud which stores an identity identification code and a cloud verification signature code of a household appliance slave device, and an identity identification code, a cloud verification signature code and a local verification signature code of a communication node device; and when the edge node, the communication node equipment and the household appliance slave equipment are in communication connection, establishing communication connection between the edge node and the communication node equipment as well as between the communication node equipment and the household appliance slave equipment through the cloud verification signature code and the local verification signature code, and controlling and releasing data verification. According to the invention, two-stage security protection can be realized, so that all networked household appliances have self-protection and system-level protection capabilities, and the security of household big data generated by the Internet of Things is improved.

The present invention provides an RACH receiving apparatus in which the components can be constructed in a small scale.

The RACH receiving apparatus performs a demodulation processing so as to divide it into two stages of a first demodulation processing for multiplying reception data of complex-modulated RACH by sign codes subjected to an arithmetic processing with long codes and phase rotations in a code register multiplying unit, and a second demodulation processing for adding multiplication results every chips and multiplying addition results by signature codes in a signature multiplying unit.