17 results about "Proxy signature" patented technology

The invention discloses a multi-authoritative attribute-based proxy signature method with a flexible threshold, and relates to the technical field of cyberspace security, the method comprises the following steps: constructing a multi-authoritative attribute-based proxy signature system with entities including a central attribute authority, a distributed attribute authority, an original signer, a proxy signer and a verifier, and establishing system parameters, carrying out system initialization; generating a secret key for an original signer and a secret key for a proxy signer through central attribute authority and distributed attribute authority respectively; the original signer generates a consignment and authorization to the proxy signer; after the proxy signer receives the authorization sent by the original signer, authorization verification is carried out; after the authorization verification is passed, the proxy signer calculates a proxy signature for the message according to the authorization sent by the original signer, and sends the message, the delegate and the proxy signature to the verifier; the verifier verifies the proxy signature based on the message and the delegate. The method is high in flexibility and adaptability.

The invention provides an electronic contract multi-identity authentication method and device of a mobile terminal, equipment and a medium, and the method comprises the steps: determining whether to transmit an identity verification code to user equipment according to the response identity data and response behavior data of the user equipment to first identity authentication information; determining whether the user equipment passes the first identity authentication according to the input behavior data when the user equipment inputs the identity verification code; determining whether the user equipment passes the second identity authentication or not according to a real-time response behavior made by the user equipment for the second identity authentication information and the waiting response duration; determining whether the user equipment passes the third identity authentication according to a video frame sequence of the user equipment corresponding to the third identity authentication information and a shooting waiting time length; and if the user equipment passes the third identity authentication, determining that the multiple identity authentication of the user equipment is successful, and displaying an electronic contract to the user equipment. Therefore, the problems of false use and signing-for-another of the electronic contract are effectively avoided.

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.

The invention provides a distributed identity authentication method, a node, a providing end, equipment, a medium and a product, and relates to the technical field of block chains, the method comprises the following steps: a proxy node generates a first public key and a first private key; the proxy node obtains first decentration identification information and digital identity management information of the user equipment; the proxy node verifies the distributed digital identity ownership of the user equipment according to the proxy signature entrustment and the second public key, and generates a URL (Uniform Resource Locator); the proxy node sends the URL of the user equipment to the service provider and receives a first verifiable statement; and the proxy node sends an identity verification request generated based on the first verifiable statement to the user equipment, and generates a complete second verifiable statement after knowing that the user equipment confirms the identity verification request. According to the invention, selective disclosure of privacy information by the user is supported, so that identity authentication does not depend on a traditional centralized mechanism any more, and the problems of single-point failure, privacy disclosure and the like are avoided.

The invention relates to the technical field of smart power grids and information security, in particular to a PUF (Physical Unclonable Function)-based certificateless proxy signature smart power grid distributed energy transaction method, which comprises the following steps of: constructing a PUF-based certificateless proxy signature smart power grid distributed energy transaction system, transaction is carried out based on the certificateless proxy signature smart power grid distributed energy transaction system; the system comprises a power grid operator, an energy manufacturer, an agent, PUF equipment and a block chain, the transaction process comprises an initialization stage, an identity authentication stage and a transaction stage; according to the method, the unique key of the equipment is generated through the PUF, the problems of complex certificate management and key escrow are avoided by adopting a certificateless mechanism, decentralized evidence storage and non-tampering of transaction data are ensured based on the block chain, the problems of insufficient security, low efficiency and weak anti-attack ability of a traditional scheme can be effectively solved, and the method is adaptive to the resource-limited Internet of Things equipment and has the advantages of high security and high reliability. And efficient and credible safety guarantee is provided for distributed energy transaction of the smart power grid.

The invention provides a trusted data sharing certificateless proxy signature method and system based on a block chain. The method comprises the following steps: constructing a trusted data sharing system and a distributed account book by utilizing a block chain technology; a user (signer) obtains a transaction address of a transaction object (verifier) from a trusted data sharing system, and authorizes a proxy signer to sign a data sharing transaction with the verifier on behalf; the proxy signer generates proxy public and private keys by using the proxy certificate, signs the transaction by using the proxy private key, and sends the transaction to the trusted data sharing system; the verifier verifies the correctness of the signature of the related data sharing transaction; verified data transactions and related records are uploaded to a credible data sharing system for whole-network consensus and are registered on an account book. According to the invention, the credible sharing and transaction of data are realized by using the certificateless proxy signature and the block chain technology.

The invention discloses PBFT algorithm optimization based on SipHash proxy signature in an Internet of Things environment, and particularly relates to the field of block PBFT consensus algorithms in the Internet of Things environment, which is characterized by mainly comprising the following steps: S1, constructing a reputation value model, and calculating a comprehensive reputation value according to related performance attributes of equipment in the Internet of Things environment; and S2, dividing different role identities for the devices according to the comprehensive reputation value in the S1, and enabling the devices to participate in different consensus stages according to respective identities. And S3, a minimum cost function is designed, the device can select an agent node in an offline state for the device, and a multi-level agent signature chain is formed. And S4, the proxy signature equipment generates a proxy signature, and other equipment verifies the proxy signature. And S5, optimizing the PBFT consensus protocol under the condition that the equipment is offline. The method has the advantages that the performance of the PBFT consensus algorithm in the Internet of Things environment is improved, the stability and fault tolerance of a consensus system are enhanced, and the problem of distributed consistency in the Internet of Things environment is solved.

This invention provides a method for generating virtual identities based on the metaverse, aiming to achieve trusted identity generation and verification of consistency between virtual and real identities. The method collects user public and private keys, iris features, and semantic description information, and achieves multi-party trusted binding through an additive homomorphic threshold mechanism. It employs a structured perturbation-lookup table hybrid hash mechanism, fusing Griffin power mapping and Reinforced Concrete lookup table compression, to generate tamper-resistant digests for user public keys. It combines iris features and proxy signature parameters to generate physical identity information. Furthermore, it uses an identity-driven consistency twin network to achieve behavioral consistency verification and driver type discrimination between virtual and original identities. The method is applicable to Web3.0, decentralized identity authentication, and metaverse identity management, possessing high security, strong verifiability, and cross-platform interoperability.

The application relates to a method for realizing blockchain verifiable certificate application based on a safe endogenous commercial cipher technology, and the method comprises the following steps: initiating a blockchain digital identity (DID) application request, generating a user SM2 public and private key pair by a commercial cipher (KMS) and hosting the private key after identity verification, and completing DID registration; initiating a VC application request, signing a one-time JWT authorization certificate by the commercial cipher (KMS) through an agency-level SM2 key pair, carrying out business circulation and auditing, performing user private key proxy signature and agency private key signature based on the JWT authorization, and uploading an SM3 hash value of a VC document to a blockchain system to complete trusted storage. The method, system, device, processor and computer readable storage medium thereof based on the safe endogenous commercial cipher technology realize user experience optimization, system iteration flexibility, great improvement of system iteration efficiency, better signature and verification performance, and controllable identity credibility.

The present invention discloses a method and mechanism for sharing and circulating hydropower data elements. The method comprises: Step 1, parameter setting; Step 2, user authorization: a key management server authorizes each system participant through key distribution and records relevant information on a blockchain platform; Step 3, data transfer authorization: a data user generates a proxy file, sets an access structure, and sends a portion of the proxy signature key component to another user; Step 4, encrypted upload of hydropower data elements: the hydropower data owner encrypts the hydropower data file, generates a ciphertext index, uploads it to the blockchain platform, and stores it on the hydropower data cloud platform; Step 5, trapdoor generation; Step 6, data search and access; Step 7, verification and decryption; and Step 8, compliance review and user rights deprivation. The mechanism comprises: hydropower data resourceization; hydropower data componentization; and hydropower data productization. The present invention enables the sharing and circulation of hydropower data in a secure, efficient, and compliant manner.

The application provides a lattice-based aggregated proxy signature method and system, comprising the following steps: S1, generating a key pair of an original signer and a proxy signer by a key generation algorithm; S2, generating a proxy key pair for the proxy signer by the original signer on the original signature side; S3, verifying the validity of the proxy key pair by the original signer's public key on the proxy signature side; S4, generating a proxy signature by the proxy signer's key pair and the proxy key pair on the proxy signature side; S5, verifying the validity of the proxy signature by the proxy signer's public key and the proxy public key on the verification side; S6, aggregating the valid proxy signatures generated by all proxy signers of the same original signer; and S7, verifying the validity of the aggregated signature by the proxy signer's public key and the proxy public key on the verification side.

The invention relates to a safe and efficient warrant aggregation agent signature method, which comprises the following steps of: respectively generating a public key and a private key of a delegator i and an authorization agent j, and acquiring an identity identifier of the authorization agent j; the delegator i generates a digital signature for digital signature contents such as a public key of the delegator i, a signable message space, a public key of the authorization agent j, an identity identifier and the like by using a private key of the delegator i, and the digital signature contents and the digital signature form delegation information (also called as an authorization voucher, called as a warrant for short); the proxy j receives the entrustment information, verifies whether the entrustment information is valid based on the public key of the entrustor i, and if so, calculates to obtain a proxy signature private key; performing proxy signature on the message by using the proxy signature private key; after the proxy signature, the verifier verifies whether the proxy signature is an effective proxy signature of the proxy j (based on the proxy delegator i) to the message; if yes, the proxy signature takes effect; otherwise, cancelling. The safe and efficient proxy signature method is obtained through aggregation of the warrant and the signature.

The invention provides a medical data cross-chain sharing-oriented specified verifier proxy signature method, which comprises the following steps of: designing a medical data cross-chain security sharing system based on a relay chain, and establishing a medical data cross-chain sharing transaction machine; the signer initiates a cross-chain sharing transaction with the specified verifier, and authorizes a proxy signer to sign the cross-chain sharing transaction; after the proxy signer verifies the authorization information, proxy public and private keys are generated, and proxy signature information of the cross-chain transaction is generated; the specified verifier verifies the validity of the proxy signature information, and broadcasts the verified transaction to the medical data cross-chain security sharing system; and packaging and verifying the medical data passing the cross-chain transaction verification, and finally recording the medical data in a relay chain account book and medical chain account books of the two transaction parties. According to the invention, the problem of data islands caused by medical data among different types of block chains is solved, and the security and integrity of data cross-chain sharing are ensured.

The invention provides a virtual identity generation method based on meta universe, and aims to realize credible generation and virtual-real consistency verification of identities. According to the method, public and private keys of a user, iris features and semantic description information are collected, and multi-party credible binding is realized through an addition homomorphic threshold mechanism; a structure disturbance-table look-up mixed Hash mechanism is adopted to be fused with Griffin power mapping and Reinformed Concrete table look-up compression, and an anti-tamper abstract is generated for the user public key; physical identity information is generated in combination with the iris features and the proxy signature parameters; furthermore, through an identity-driven consistency twin network, behavior consistency verification and drive type discrimination between the virtual identity and the original identity are realized; the method is suitable for Web3.0, decentralized identity authentication and meta universe identity management, and has the advantages of high security, strong verifiability and cross-platform intercommunication capability.

The application discloses a work order proxy signature behavior detection method and device, equipment and a storage medium, and relates to the computer field.The method comprises the following steps: recognizing a to-be-detected work order image, obtaining a plurality of signature subgraphs contained in the to-be-detected work order image, comparing the signature subgraphs, obtaining the similarity between the signature subgraphs, judging whether similar signatures exist in the plurality of signature subgraphs based on the similarity, and performing proxy signature behavior detection on the to-be-detected work order image according to the judgment result.Because the application obtains the plurality of signature subgraphs contained in the to-be-detected work order image through identification, compares the signature subgraphs, judges whether similar signatures exist based on the similarity between the signature subgraphs, and accurately detects whether proxy signature behavior exists in the to-be-detected work order image, the proxy signature behavior detection efficiency is effectively improved, and the detection cost is greatly reduced.

The invention relates to a safe and efficient identity hiding proxy signature method. The method comprises the steps that a proxy j generates second information (pi, theta, tpkj) based on first information (rho, omega, v) generated by a delegator i; rho is a digital signature generated by i, omega is a signable message space, and v is a random number; pi and theta are first and second digital signatures generated by j, and tpkj is a temporary public key of j; i, generating delegation information (u, tau) based on the second information; u is calculated by i based on the identity encryption key aki, Enc (aki, idj; v) obtaining; tau is the generated commission signature message; j, receiving the delegation information, and verifying whether the delegation information is valid based on the public key of i; if so, calculating a proxy signature private key, and performing proxy signature on the message by using the proxy signature private key; after signature, the verifier verifies whether the proxy signature is an effective proxy signature of the authorized proxy to the message; if necessary, i identifies the proxy identity through aki, and others cannot identify the proxy identity.

An integrity layer implements an Integrity Management (IM) module that creates and challenges integrity digests for artifacts identified by artifact references. A digest entry records an artifact reference, an artifact hash, a digest hash, signatures, a timestamp, metadata, and chain references to other digest entries. Digest entries are stored in an integrity store. To create a digest, a control-layer agent requests creation, the IM module computes the artifact hash, assembles the digest, obtains an agent signature, countersigns, records the digest, and returns it. To challenge, the IM module generates an artifact hash and compares it to the stored artifact hash. If the hash matches, the IM module recursively challenges each referenced digest entry in the chain. Chains may reference digests for source code, a compiler, a build environment, dependencies, and a workload bundle. Creation can occur at source, compilation, packaging, and registration stages.