8 results about "Elliptic Curve Digital Signature Algorithm" patented technology

The invention provides an enhanced lightweight authentication method and system for Internet of Vehicles, and the method comprises the steps: carrying out the distinguishing design of a message signature and verification mechanism according to the demands of differentiated authentication in a V2I (vehicle-to-road communication) scene and a V2V (vehicle-to-vehicle communication) scene, guaranteeing that the communication between a vehicle terminal and a road side unit is high in reliability, and carrying out the verification of the communication between the vehicle terminal and the road side unit; meanwhile, the flexibility and the safety of dynamic networking between the vehicles are ensured; in the certificate generation and updating process, a key evolution mechanism based on a hash chain and an XOR operation is adopted, so that the forward security and privacy protection capability are improved; efficient signature and verification are realized through an elliptic curve digital signature algorithm, and the calculation and communication overhead is reduced; the protocol supports rapid update and revocation of the certificate, and the anti-attack capability and flexibility of the system are enhanced. According to the method, the vehicle identity can be effectively prevented from being tracked, the communication security and user privacy in an Internet of Vehicles environment are guaranteed, and the security and practicability of an Internet of Vehicles system are remarkably improved.

The application discloses a blockchain-based digital copyright evidence storage method, an electronic device and a readable storage medium. The digital copyright evidence storage method comprises the following steps: collecting original content and environment data of a digital work, generating a content hash value and environment data by a hash algorithm, combining the content hash value and the environment data into a to-be-signed meta-information package, generating a data signature by an elliptic curve digital signature algorithm, forming a signed copyright digest data package, and obtaining a structured digest hash value by hashing again; analyzing the environment data of the digital work to obtain a data confidence coefficient, constructing a Merkle tree in combination with the structured hash value, obtaining a root node value and path index information; storing the root node and key meta-information in a blockchain main chain, generating a blockchain auxiliary chain mapping identifier through a work ID and a type hash, and storing a structured copyright data signature package, path index and confidence coefficient in an off-chain database.

Methods and devices for generating an elliptic curve digital signature algorithm signature (r, w) are described. In one embodiment, a method includes: i) forming, by a node, a signing group with other nodes; ii) obtaining, by the node, based on a secure random number: a) a multiplicative inverse of the secure random number; and b) the first signature component, r, wherein the first signature component is determined based on the secure random number and an elliptic curve generator point; iii) determining, by the node, a partial signature based on a private secret share, the multiplicative inverse of the secure random number and the first signature component; iv) receiving, by the node, partial signatures from other nodes of the signing group; and v) generating, by the node, the second signature component, w, based on determined and received partial signatures.

The application relates to a multi-participant elliptic curve attack method and device and a storage medium, and relates to the technical field of cryptographic security verification. The application collects public keys of all participants, and obtains an elliptic curve base point of an elliptic curve digital signature algorithm; the public key of a first participant in the public keys of all participants is iteratively randomly selected with a coefficient, and a current coefficient public key Q1 and the base point G are used to calculate a point; after each random walk calculation of the point, collision detection is performed in a point sequence range calculated by the first participant; if collision occurs, a private key is obtained according to a collision result; starting from the public key of a second participant, collision detection is performed in a point sequence range calculated by the current participant and all previous participants; when collision occurs, a private key is obtained according to a collision result.

Systems and methods for securing an Elliptic Curve Digital Signature Algorithm (ECDSA) nonce communicated between symmetric and asymmetric cryptographic co-processors in a heterogeneous system are discussed. In some embodiments, a processor may include: a symmetric portion configured to generate Boolean masked shares, wherein the Boolean masked shares constitute a nonce; and an asymmetric portion coupled to the symmetric portion, the asymmetric portion configured to produce an ECDSA signature based, at least in part, upon the nonce.

The embodiments of this application relate to the field of industrial data encryption processing technology, and disclose a supply chain data access control method that supports attribute revocation and update. This method is applied to an established supply chain data access control model, which consists of a data accesser, a data owner, an authentication and authorization center, an attribute authorization center, and a cloud service provider. Through global initialization, attribute key generation, data encryption, and data decryption, the data accesser can securely access the data provided by the data owner, achieving efficient and secure data access control. The supply chain data access control model supports complete revocation and update of user attributes. By applying elliptic curve digital signature algorithms, hash algorithms, and asynchronous update strategies, it effectively eliminates single-point performance bottlenecks and leakage problems, achieving efficient complete revocation and update of attributes.

Techniques are presented for using a processing resource to control access to a resource. Steps comprise generating an elliptic curve digital signature algorithm signature comprising a first signature component, r, and a second signature component, w, the generation step comprising: forming, by a node, a signing group with other nodes; obtaining, by the node, based on a secure random number: a) a multiplicative inverse of the secure random number; and b) the first signature component, r, wherein the first signature component is determined based on the secure random number and an elliptic curve generator point; determining, by the node, a partial signature; receiving partial signatures from other nodes of the signing group; generating the second component; and using the signature to control access to the and / or transfer of a resource over a computer-implemented network.

The invention discloses a terminal communication network intrusion prevention system based on WAPI (Wireless Local Area Network Authentication and Privacy Infrastructure). The terminal communication network intrusion prevention system comprises six units, namely a double-domain heterogeneous key negotiation interaction unit and a multi-modal feature vector construction unit. The method comprises the following steps: establishing an asymmetric key negotiation channel by fusing a WAPI triple authentication mechanism and an elliptic curve Diffie-Hellman key exchange protocol, and realizing security key interaction and session key generation; the multi-modal feature vector construction unit comprehensively extracts network flow features from a time domain, a frequency domain and a protocol semantic domain, and accurately identifies intrusion behaviors in combination with a dynamic threshold mechanism of the intrusion feature comparison unit; the elliptic curve encryption authentication processing unit guarantees data packet integrity and identity authentication by using an elliptic curve digital signature algorithm; and the decision control unit integrates authentication and comparison results to generate instructions, and the execution response unit completes defense operations such as network connection blocking and current limiting according to the instructions, so that efficient and reliable intrusion prevention capability is provided for a terminal communication network.