71 results about "Target signature" patented technology

The invention provides a post-quantum collaborative signature method and device based on key segmentation and a medium, and relates to the technical field of information security. The method comprises the following steps: acquiring segmentation public keys and segmentation private keys of a plurality of collaborative users; according to the user identifiers of the plurality of collaborative users, respectively calculating binding information of the plurality of collaborative users for the signature fragments of the to-be-sent message; according to the segmentation private key and the binding information of each collaborative user, calculating a signature value of each collaborative user for the signature fragment; generating a target signature of the to-be-sent message according to the signature values of the plurality of collaborative users for the signature fragments; and verifying the target signature and outputting the target signature according to the segmented public keys of the plurality of collaborative users. According to the invention, the security and reliability of the collaborative signature can be improved.

The invention belongs to the technical field of information security, and discloses a hybrid collaborative signature method fusing SM2 and a post-quantum cryptography algorithm, and the method comprises the steps that a client generates a first session key based on a first post-quantum signature key pair and a first post-quantum asymmetric encryption and decryption key pair, generating a first public key ciphertext corresponding to the first public key parameter based on the first session key; the server decrypts the first public key ciphertext based on the first session key, and applies for obtaining a digital signature certificate after generating a common public key through an SM2 algorithm; performing collaborative signature according to a second session key generated by a second post-quantum signature key pair and a second post-quantum asymmetric encryption and decryption key pair, calculating by the server to obtain a first signature component intermediate value, and calculating by the client to obtain a second signature component; the client calculates a target signature value according to the second signature component, the first signature component intermediate value ciphertext and the digital signature certificate; through the method, the safety of the hybrid collaborative signature is improved.

The invention discloses a signature recognition method and device, a storage medium, electronic equipment and a product, and the method comprises the steps: carrying out the extraction of a signature region in a file through a detection sub-model, and obtaining a first image; performing enhancement processing on the first image by using the preprocessing sub-model to obtain a second image; and obtaining a target signature feature in the second image through the identification sub-model, and determining the similarity between the target signature feature and a preset signature feature in a database, so as to determine a target identification result of the signature region based on the similarity. By adopting the technical scheme, the problem that the signature detection and recognition precision cannot be effectively improved when a complex background and a low-quality image are processed is solved. And furthermore, through cooperative work of the detection sub-model, the enhancement sub-model and the identification sub-model, a signature region is accurately positioned from the document, the image quality is optimized, and signature features are compared and analyzed, so that the authenticity of the signature is efficiently judged.

The invention discloses a digital signature system which comprises a secret key management module, a data sending end and a data receiving end. The key management module comprises a key generation sub-module which is used for generating a target key corresponding to each target service according to the security level of each target service of the power system; the data sending end is used for determining a target key corresponding to a service session request of a target service in response to the service session request of the target service; signing abstract data corresponding to the target service through the target key to obtain target signature data corresponding to the service session request; service data corresponding to the target service, the target signature data and the target service identifier are sent to a data receiving end; and the data receiving end comprises a digital signature verification module which is used for performing security verification on the data sending end according to the service data corresponding to the target service sent by the data sending module, the target signature data and the target service identifier. The security of power system data transmission can be improved.

The embodiment of the invention provides an asynchronous collaborative signature processing method and device, electronic equipment and a storage medium, and the method comprises the steps: sending a collaborative signature pre-application request to collaborative party equipment, the pre-application request comprising first to-be-signed data; receiving pre-application information corresponding to the pre-application request returned by the collaboration party equipment, and performing signature processing on the current signature time and the pre-application information by adopting a preset signature algorithm to obtain target signature data; and sending the target signature data to a receiver device, and after the receiver device receives the target signature data, judging whether the current signature time accords with the signature time window, thereby verifying the target signature data. Through a collaborative signature pre-application mechanism and a signature time window management and control mechanism, the efficiency and availability problems caused by network dependence of traditional collaborative signature and the security risk problem caused by lack of time effectiveness are effectively solved.

The invention provides an anti-quantum collaborative signature method, a signature verification method, a system, equipment and a medium, and the signature method comprises the steps: decrypting an encryption private key according to a target quantum key to obtain a private key of a current signature participant, determining a commitment value of the current signature participant according to a current random number, a public index and an asymmetric encryption modulus, and verifying the commitment value of the current signature participant according to the commitment value. Determining a current signature value according to the commitment value of the current signature participant, the identity label of the current signature participant, the message to be signed, the private key of the current signature participant, the current random number, the asymmetric encryption modulus and the cross-domain session key, and sending the current signature value and the message to be signed to the next signature participant, and sending the to-be-signed message to the next signature participant, so that the next signature participant generates a next signature value according to the current signature value and the to-be-signed message until the last signature participant generates a target signature value, and sending the target signature value to the signature verification party. The security of the collaborative signature is improved by using a quantum physical mechanism, and quantum computing attacks can be resisted.

The invention relates to a signature processing method based on intelligent character recognition, which comprises the following steps: acquiring the page height of a file, and converting the file into a reference coordinate system according to the page height; automatically identifying key fields in the file; determining an initial signature area corresponding to the key field through an edge detection algorithm; through a template matching algorithm or a preset model, searching a region matched with the template in the file or determining a region output by the model, and determining a signature position; fusing the initial signature area with the signature position, and determining a target signature position; acquiring a timestamp, a geographic position and equipment information for performing signature operation at the target signature position; inputting the timestamp, the geographic position and the equipment information into a preset behavior model to obtain an abnormal behavior probability; and according to the abnormal behavior probability, determining whether to give an abnormal alarm.

The invention discloses an anti-quantum two-party collaborative signature method based on a hash function, and relates to the technical field of computers, and the method comprises the steps: obtaining a to-be-processed message M, a private key skA and a public key pkA of a signer A, and a private key skB and a public key pkB of a signer B; generating a global collaborative public key pktotal according to the public key pkA and the public key pkB; signing the to-be-processed message M according to the private key skA to obtain signature information sigA of the signer A; signing the message M to be processed according to the private key skB to obtain signature information sigB of a signer B; generating complete signature information sig according to the signature information sigA and the signature information sigB; and performing signature verification on the global collaborative public key pktotal and the complete signature information sig to obtain a target signature verification result. The validity and authenticity of the signature can be ensured, and the security of message transmission in the system is improved.

The application relates to a method and device for identifying a proxy signature, electronic equipment and a storage medium, and relates to the technical field of information security and pattern recognition. The method comprises the following steps: acquiring a set of signature images without labels; for each original signature image, performing standardization preprocessing on the original signature image; inputting each obtained target signature image into a feature extraction model trained through migration learning to extract a deep feature vector; freezing the parameters of a pre-trained bottom model and fine-tuning the parameters of a top model during training; using a density-based unsupervised clustering algorithm to cluster the target signature images according to the deep feature vectors; performing character recognition on each target signature image in each cluster to obtain signature texts; and if each signature text corresponding to a cluster contains at least two different names, it is determined that a proxy signature exists. The application realizes efficient, automatic and high-credibility identification of the specific illegal mode of one person proxying for multiple people without relying on supervised learning.

This application discloses a Domain Name System (DNS) domain name resolution method and related apparatus, relating to the field of network security technology, used to improve the security and integrity of data in DNS. The method includes: a root server receiving a domain name query request sent by a DNS server, obtaining multiple cipher suites supported by the DNS server from the domain name query request; then, according to the signature algorithms it supports, selecting a target cipher suite from the multiple cipher suites; filtering out target signature algorithms that meet priority conditions from the target cipher suites, and digitally signing the first-level domain name obtained based on the domain name query request according to the target signature algorithm to obtain the signed first-level domain name; finally, sending the signed first-level domain name and the target cipher suite to the DNS server, so that the DNS server can digitally verify the signed first-level domain name based on the target signature algorithm in the target cipher suite to obtain the verified first-level domain name.

Embodiments of the present application provide a service request verification method and device, electronic equipment and storage medium. The method comprises: based on the service application request of a user, signing a set data packet using a user private key to generate a first target signature; sending the first target signature to an authorized end to enable the authorized end to verify the first target signature, and in the case where the verification is passed, signing the identity label, set commitment protocol parameters and proof type label using an authorized end private key to generate a second target signature; based on the service application request, generating range proof information according to a ring signature range proof protocol, signing the identity label and range proof information using a user private key to generate a third target signature, and sending the third target signature to a service provider end to enable the service provider end to verify the third target signature based on the second target signature through an identity verification end. The present application has high security.

The invention discloses a method for identifying a signature in an image, electronic equipment, a storage medium and a program product. The method comprises the following steps: carrying out feature extraction on a signature image to obtain signature features; obtaining a target signature feature successfully matched with the signature feature from a plurality of preset signature features in a preset signature database; a target signature rule corresponding to the target signature feature is determined from a preset rule base, and preset signature rules corresponding to a plurality of preset signature features are stored in the preset rule base; and identifying the signature feature based on the target signature rule to obtain an identification result of the signature image, the identification result being used for representing whether the signature image satisfies the target signature rule. According to the invention, the technical problem of low identification efficiency of the signature in the image in the prior art is solved.

Embodiments of the present application provide a millimeter wave radar-based vehicle identification method and system, wherein the method comprises: determining target information according to a target echo signal; determining target discrimination information according to the target information; and generating a target vehicle identification result according to the target discrimination information; wherein the target information comprises target distance information and / or target amplitude and phase information; and the target discrimination information comprises a target pitch angle and / or a target signature quantity. The present application can improve the output accuracy of the vehicle identification result in a scenario where the number of transceiving antennas is limited or the size is limited.

Various embodiments of the present disclosure provide an ambient sensor prediction technique that improves the functionality of a computer in various aspects. The technique comprises receiving an excursion message that comprises sensor-based feature values, identifying an entity signature for the excursion message based on a first subset of the plurality of sensor-based feature values and one or more contextual attributes based on a second subset of the plurality of sensor-based feature values, identifying a target log file corresponding to the excursion message based on a comparison between the entity signature and a tracking target signature corresponding to the target log file, and storing the one or more contextual attributes as one or more of a plurality of historical contextual attributes of the target log file.

Embodiments of the present application provide a computer target object verification method, device, storage medium and related device. The computer target object verification method comprises: obtaining a public key signature, wherein the public key signature comprises a signature of a processor private key on a public key certificate, and the public key certificate comprises at least a computer public key; using a processor public key pre-configured in the processor to verify the public key signature; when the processor public key verifies the public key signature successfully, using the computer public key to verify a target signature, wherein the target signature is a signature of a computer private key on a target object; and when the computer public key verifies the target signature successfully, the target object is verified successfully. It can be seen that the computer target object verification method provided by the embodiments of the present application can be implemented by a computer while verifying the trusted root verification program or data in the processor.

The invention provides an anti-quantum ciphertext retrieval method and device based on attribute encryption and a medium, and relates to the technical field of information security. Comprising the following steps: encrypting each keyword in each file according to a user public key, and generating a keyword ciphertext of each keyword; for each keyword, querying a file identifier comprising each keyword, and generating a file identifier set of each keyword; generating keyword signature information of each keyword according to the user public key, the user private key and the file identification set of each keyword; generating an encryption index of each file according to the file ciphertext of each file and the keyword ciphertext of all keywords in each file; generating target signature information of each keyword according to the keyword ciphertext of each keyword and the keyword signature information of each keyword; uploading the encrypted index of each file to a cloud server; and uploading the target signature information of each keyword to an authority. According to the invention, the potential safety hazard of a traditional scheme in a quantum computing environment is solved.

The invention discloses a certificate issuing method and device of a PKI trust model, equipment and a medium, and relates to the technical field of information security, and the method comprises the steps: determining a target signature algorithm of each certificate authority according to the business characteristics of the certificate authority and the position of the certificate authority in the trust level of the PKI trust model; generating a self-signature root certificate based on a target signature algorithm through the root certificate issuing mechanism; when a certificate is applied to a parent certificate issuing mechanism, a first signature public key determined based on a target signature algorithm is sent to the parent certificate issuing mechanism through an intermediate certificate issuing mechanism, so that the first signature public key is authenticated and signed to complete certificate issuing; and the information of the terminal user is authenticated and signed through the final-stage certificate issuing mechanism, and a second signature public key generated based on the target signature algorithm is sent to the intermediate certificate issuing mechanism, so that the second signature public key is authenticated and signed, and certificate issuing is completed. Therefore, the certificate can be signed and issued conveniently and flexibly.

The application discloses a kind of data packet sending object determination method and device. It is related to communication field, the method comprises: obtaining target request sent by first object;Extract target signature from first data packet, wherein the target signature is allocated by data authentication system for the object corresponding to first data packet for sending first data packet to privacy computing module, and the target signature is used to represent the object identity of the object for sending first data packet to privacy computing module;From the signature and object with corresponding relationship, obtain the second object corresponding to the target signature, wherein the second object is the object that has sent first data packet to privacy computing module;Second object is sent to first object. By the present application, the problem that the sending object of data packet cannot be determined in the related art is solved.

The embodiment of the invention provides a memory testing method and electronic equipment. The memory test method comprises the steps of storing a target signature file and a memory test script in a target test partition when to-be-tested equipment is in a factory test mode; writing or deleting a start test flag bit in the random access memory based on the trigger state of the preset combination key; in the power-on self-test process of the basic input and output system, detecting whether the start test flag bit exists in the random access memory or not; if the test starting flag bit exists in the random access memory, the device to be tested is controlled to start the target test partition to execute memory test operation, so that automatic test of the memory is achieved, and the memory test efficiency is remarkably improved.

The application provides an attribute encryption-based anti-quantum ciphertext retrieval method and device and medium, and relates to the technical field of information security. The method comprises the following steps: encrypting each keyword in each file according to a user public key to generate keyword ciphertext of each keyword; querying, for each keyword, a file identifier set comprising each keyword to generate a file identifier set of each keyword; generating keyword signature information of each keyword according to the user public key, a user private key and the file identifier set of each keyword; generating an encrypted index of each file according to file ciphertext of each file and keyword ciphertext of all keywords in each file; generating target signature information of each keyword according to the keyword ciphertext of each keyword and the keyword signature information of each keyword; uploading the encrypted index of each file to a cloud server; and uploading the target signature information of each keyword to an authority. The application solves the security risks of traditional schemes in a quantum computing environment.

The present application belongs to the technical field of cryptography. Disclosed are a signature generation method and apparatus, and a device, a storage medium and a program product. The method comprises: acquiring first signature data from among a plurality of pieces of signature data, wherein the first signature data comprises a first count value and a first signature parameter, the first signature parameter is determined on the basis of a first signature random number, and the first signature random number is determined on the basis of the first count value; and on the basis of the first signature data, generating a signature of target data by means of a target signature algorithm. In the present application, when target data is signed, first signature data is directly retrieved from among a plurality of pieces of signature data and used, and there is no need to calculate the first signature data in real time, thereby improving signature efficiency. Since the signature data comprises a count value for determining a signature random number, rather than the signature random number itself, there is no need to securely store the count value, and a signature process is not limited by the resource bottleneck of secure hardware that stores the signature random number.

A method of generating a blockchain transaction comprising: generating a transaction comprising a locking script comprising a first shared hash value (HV) generated by applying a hash function (HF) to a second shared HV, wherein the second shared HV is generated by applying a HF to a combination of the respective public keys, and wherein the locking script is configured to require an unlocking script to comprise a target public key, a target signature, and an intermediate HV generated based on all but one of the respective public keys, apply the HF to the target public key to generate a target HV, combine the target HV and the intermediate HV to generate a target second shared HV, apply the HF to the target second shared HV to generate a target first shared HV, an verify that the target first HV matches the first shared HV, and verify the target signature.

The invention discloses a digital signature method, a signature verification method and a digital signature system. The method comprises the following steps: acquiring a public key and a private key; determining a commitment vector based on the public key and the random mask vector; determining a signature challenge value and a response vector based on the commitment vector, the random mask vector, the private key and the to-be-signed message; determining an intermediate verification vector based on the signature challenge value; comparing the intermediate verification vector with a preset range, and determining a prompt vector based on the intermediate verification vector when the intermediate verification vector belongs to the preset range; and determining a target signature corresponding to the signature challenge value, the response vector and the prompt vector. The technical problem that a signature algorithm needs to frequently reject sampling and is low in calculation efficiency due to the fact that a digital signature method adopted in the related technology is difficult to give consideration to public key scale and security is solved.

The invention provides a signature recognition method and device, electronic equipment, a storage medium and a program product, and belongs to the technical field of financial science and technology. The method comprises the following steps: acquiring a complete signature sample set, a first incomplete signature sample set obtained by removing strokes from a complete signature image sample for each incomplete signature image sample, and a second incomplete signature sample set obtained by removing an occlusion data set from the complete signature image sample for each incomplete signature image sample; according to the three signature sample sets, generating a target signature sample set in which each target signature image sample comprises signature image samples corresponding to the same complete signature in the three signature sample sets; training a signature integrity recognition model by using the target signature sample set; in the training process, the signature integrity recognition model carries out missing feature transfer learning on each target signature image sample. According to the invention, the accuracy of identifying incomplete signatures by the signature integrity identification model can be improved.

The invention provides a signature verification method and device, electronic equipment and a storage medium. The method comprises the following steps: when a target request is intercepted in a request processing link, analyzing a target method corresponding to the target request; identifying a signature verification annotation defined on the target method, and determining the type of the signature verification annotation; based on the type, determining a corresponding target signature verification processor from preset signature verification strategy mapping; acquiring configuration parameters required by signature verification according to configuration information declared in the signature verification annotation; and utilizing the target signature verification processor to execute signature verification on the target request based on the configuration parameters, and controlling release or interception of the target request according to a verification result. Therefore, on-demand flexible adjustment of the signature verification strategy is realized, so that the maintainability and flexibility of the system in the aspect of signature verification are improved.

The invention provides an Internet of Things equipment access authentication method, a terminal, equipment, an agency and a platform. The method comprises the following steps: a user terminal generates a first authentication public parameter; a first semi-secret key is received, the first semi-secret key is generated by the target trusted agent based on a target authentication public parameter, the target authentication public parameter is obtained by combining the first authentication public parameter and a second authentication public parameter, and the second authentication public parameter is generated by the Internet of Things device; performing localized signature on the first semi-secret key to obtain a first local signature, and receiving a target signature which is used for access authentication of the Internet of Things equipment and is obtained by performing online signature on the first local signature and a second local signature by a target trusted agent; the second local signature is obtained by carrying out localized signature on the Internet of Things equipment. Through the progressive half-coverage signature operation, it is ensured that effective traceable and authentication information exists in the signature, the information is not counterfeited, the safety is improved, and the calculation process can also be simplified.

The invention discloses a multi-core SoC peripheral permission obtaining method, device and equipment, a medium and a product, and relates to the technical field of security, and the method comprises the steps: generating a system public parameter and a master key through a key generation center; determining an identity identifier of the authority request entity; generating a part of private keys based on the master key and the identity identifier through a key generation center; part of the private key is sent to the authority request entity; generating a complete key pair based on the partial private key, a preset secret value, an identity identifier and a system public parameter through an authority request entity; signing the permission request information by using the complete private key through the permission request entity to obtain a target signature; the target signature and the partial public key are sent to the permission arbitration unit; verifying the target signature based on the target signature and the partial public key through the permission arbitration unit to obtain a verification result; if the verification result shows that the target signature passes the verification, the target peripheral is granted the access authority, and safe operation of the system can be guaranteed.

The invention discloses an electronic signature verification method and device, a storage medium and electronic equipment. Relates to the technical field of artificial intelligence. The method comprises the following steps: acquiring a to-be-verified target signature video generated by a target object in an interactive application; performing feature extraction on the target signature video through a target feature extraction model to obtain first feature information; second feature information is obtained from a database based on a label corresponding to the target object, and the second feature information is obtained based on a real signature video of the target object; and performing electronic signature verification according to the first feature information and the second feature information to obtain a verification result. Through the electronic signature verification method and device, the problem that the verification cost of the electronic signature is relatively high because the electronic signature pen of a special hardware device needs to be used for capturing the dynamic writing track in the signature process of the user to judge the authenticity of the signature of the user in the related technology is solved.

The invention discloses a safe starting method of an embedded system, a controller, equipment and a medium, and the method comprises the steps: under the condition that a target mirror image is ready to start, reading a first mirror image hash value corresponding to the target mirror image to obtain a first reading result; under the condition that the first reading result represents that the first mirror image hash value does not exist in the secure memory, performing first starting verification of the target mirror image according to the target signature information, the target public key and the first public key hash value; under the condition that the first reading result represents that the first mirror image hash value exists in the secure memory, performing hash operation on the target mirror image to obtain a second mirror image hash value, and comparing the second mirror image hash value with the first mirror image hash value to obtain a first comparison result, and starting the target mirror image or performing first starting verification on the target mirror image according to the first comparison result. The overall starting time can be shortened, and the user experience is improved.

The invention provides a block chain transaction execution method, a related device and a medium. The method comprises the steps that a contract execution request of a target object for a target contract is received, and the contract execution request is used for triggering the target contract according to target private key indexes provided by more than a first number of objects in a target object group so as to execute a target transaction specified by the target contract; receiving target private key indexes provided by more than a first number of objects; for each received target private key index, obtaining a target signature block corresponding to the target private key index, the target signature block being obtained by signing based on a target private key fragment corresponding to the target private key index; generating a target signature based on the first number of target signature blocks; and performing first verification on the target signature, and executing the target transaction after determining that the first verification is passed. According to the method and the device, the transaction execution efficiency can be improved while the transaction execution security is improved. The method and the device can be applied to various scenes such as block chains, artificial intelligence and cloud technologies.