10results about How to "Enhanced anonymity" patented technology

The embodiment of the invention discloses a dynamic protection method, system and device, electronic equipment and a computer readable medium. A specific embodiment of the method comprises the following steps: generating a first temporary private internet protocol address and a second temporary private internet protocol address; acquiring first communication information and second communication information; respectively sending the first communication information and the second communication information to the second user terminal and the first user terminal through a signaling server; generating a session random identifier, a main public key and a second user identifier corresponding to a second user terminal; generating a second temporary key pair corresponding to a second user terminal; sending encrypted information corresponding to the first symmetric key to a second user terminal; and in response to determining that the second user terminal has acquired the decrypted first symmetric key, performing encrypted communication processing between the first user terminal and the second user terminal. According to the embodiment, leakage of the Internet protocol address is prevented, and the privacy protection level of the user during session communication is improved.

The present invention discloses a data transaction dual-factor dynamic identity authentication method based on an alliance chain, comprising the following steps: when a transaction occurs between a user node and a counterparty node, judging whether the counterparty node is a first-time transaction based on a node transaction TRV record list containing a transaction trust evaluation value TRV; if the counterparty node is a first-time transaction, verifying the unique identity token UIT of the counterparty node, and after verification, entering the transaction link with the lowest tradable level; if the counterparty node is not a first-time transaction, determining the tradable level of this transaction based on the node transaction TRV record list, and entering the transaction link with the tradable level. The present invention also discloses a data transaction dual-factor dynamic identity authentication system based on an alliance chain. The present invention adopts a dual-factor identity authentication element to dynamically authenticate the identity transaction level, and guarantees the rights and interests of both parties to the data transaction and the reliability and convenience of the transaction on the basis of enhancing anonymity.

The invention discloses an Internet of Vehicles authentication method based on a block chain and a physical unclonable function, and relates to the field of data security, and the method comprises the steps: a vehicle and a communication object complete registration at a roadside base station, and a vehicle end integrates a PUF and a fuzzy extractor to generate a master key bound with equipment; during authentication, the vehicle uses the password, the biological characteristics and the PUF response to perform multi-factor authentication, and submits a Merkle proof of a target communication object to the roadside base station; and the roadside base station verifies the proof and confirms the access authority through the block chain smart contract, and assists the vehicle and the communication object to complete mutual authentication and negotiate the session key. According to the method, the block chain is utilized to ensure that data cannot be tampered, equipment cloning is resisted through the PUF, efficient authorization control is realized in combination with the Merkle tree, pseudo name dynamic updating and identity revocation are supported, and finally, the calculation, communication and storage overhead is remarkably reduced while the security is ensured.

The utility model discloses a portable anonymous health consultation self-service terminal device, which relates to the technical field of psychological health consultation, and comprises an isolation assembly, a consultation terminal assembly is arranged in the isolation assembly, the consultation terminal assembly comprises a terminal machine, a touch screen is fixedly arranged on one side of the top end of the terminal machine, and the touch screen is connected with the isolation assembly. An operation table is arranged on one side of the middle of the terminal, a microphone is fixedly installed in the middle of the top end of the operation table and is a voiceprint mask microphone, a camera module is arranged at the top of the touch screen, a physical mask is slidably connected to the surface of the camera module, and broadcasting ports are formed in the two sides of the terminal. Heart rate monitoring modules are arranged at the two ends of the top of the operation table, and the heart rate monitoring modules are in wireless communication connection with the consultation terminal assembly; according to the utility model, the user can conveniently carry out anonymous psychological consultation, more non-voice information can be provided for psychologists, the accuracy and effect of consultation are improved, and the psychological consultation system has high practical value.

The invention discloses a lattice-based linkable linear homomorphic ring signature method. The method comprises the steps of system initialization, user key generation, ring signature generation, ring signature verification, signature link judgment and homomorphic signature combination and verification. According to the method, a ring public key with a fixed size is constructed through trap door derivation and matrix aggregation technologies, so that the problem of linear increase of storage overhead when the ring scale is expanded is solved, and the storage efficiency is remarkably improved; and meanwhile, by utilizing a link label mechanism based on a fault-tolerant learning problem, association judgment of signatures generated by the same signer is realized on the premise of protecting the anonymity of the signer, and verifiability and supervision are provided for data calculation in an anonymous environment.

The invention belongs to the technical field of data transmission of a vehicle-mounted crowd sensing system, and discloses a vehicle-mounted crowd sensing data encryption transmission method and system. A secret key exchange protocol based on an SM2 digital signature is adopted to ensure the security of data transmission, including correctness of a signature and a session secret key; and a pseudonym is generated in a data processing process to realize anonymity and traceability of the user. According to the invention, the problems of user identity privacy and user data security in the vehicle-mounted crowd sensing system are solved. User privacy protection is enhanced: by generating a pseudonym for each vehicle user, the privacy of the user is protected, and meanwhile, the capability of tracing the real identity of the user when necessary is reserved. Due to the design of the edge nodes, the system can flexibly process tasks of different scales, screening can be carried out according to the credits of the vehicle users, and the task execution efficiency and quality are improved.

The invention discloses a block chain identity anonymity method capable of being supervised by multiple parties, and the method comprises the steps: receiving a transaction sent by a sender, and the transaction comprises a one-time address, a plurality of identity ciphertexts, and a plurality of supervisible certificates; the one-time address is a target address generated by the sender according to a query public key and a decryption public key of the identity information certificate sent by the receiver; the identity ciphertext is obtained by encrypting a query public key and a decryption public key of a receiver by the sender through the public keys of the supervision parties; the multi-party supervision proof is obtained by the sender through calculation based on a one-time address calculation process, an identity ciphertext encryption process and an identity information certificate; the sender and the receiver register in the public key infrastructure to obtain an identity information certificate; and verifying the multi-party supervision proof, and if the verification is passed, confirming the transaction and executing the transaction. According to the method and the device, the anonymity of the identity and the non-linkability between the one-time addresses of the same identity are ensured.

The invention relates to a social network key figure hiding method and device based on target k node decomposition, and the method comprises the following steps: S1, assuming an undirected and unweighted network G, distributing a core value C (v, G) to each node in the network through employing a k core decomposition algorithm, and defining the node with the highest core value in the social network as a key figure Vk; s2, for each node, obtaining hierarchical weight information M of the node, and constructing a backtracking tree GBT for a target k node to obtain a candidate edge set H; and S3, according to the candidate edge set H, selecting the edge e with the most influenced nodes for trimming and deleting. And S4, repeating the step S3 until all nodes in the target k node are removed from the k nuclear subgraph, namely, achieving the key figure hiding effect. According to the method, an onion decomposition algorithm and a backtracking tree algorithm are improved, and a backtracking tree is constructed to obtain a set of least connected edges in a graph needing to be deleted, so that a specified target node is separated from a k-kernel subgraph, and the hiding of key figure information in a social network is realized.

This application discloses a data processing method, apparatus, device, storage medium, and program product, relating to the field of data processing technology. The method includes generating a privacy vector and a public key vector based on anonymity query rule data and public parameters, where the public parameters are jointly determined by the data queryer and the data provider; sending an anonymity request to the data provider, the anonymity request carrying the public key vector, the anonymity request being used by the data provider to generate a secret vector and a secret number, the secret vector being a vector in which the data provider encrypts and hides the entire original data using a random mask and an error vector, and the secret number being a secret number associated with the public key vector and the random mask, encrypted and hidden using random error; receiving data feedback information sent by the data provider, the data feedback information including the secret vector and the secret number; and determining the request result corresponding to the anonymity request from the data feedback information based on the privacy vector. This approach can resist quantum computing attacks and prevent data leakage.

The invention discloses a credible, privacy, verifiable and traceable data circulation method and system. The method and system are applied to an environment formed by a plurality of data use modules, a cloud service module, a plurality of oracle machine modules, a plurality of data providing modules and a block chain platform. The system generates system parameters and keys through the oracle machine module, and each module generates own parameters and keys; the data providing module uploads data, and the data is forwarded to the cloud service module for storage after the authenticity of the data is judged by the oracle module; the data use module makes a data use request, and the cloud service module responds to and returns data after verification; and after data leakage occurs, the cloud service module extracts data watermarks for responsibility investigation. According to the method, the credibility, privacy, verifiability and traceability of the data circulation process can be ensured, so that the problems of data from an untrusted data provider, verifiability calculation under an untrusted server and data leakage traceability are solved.