8 results about "Identity privacy" patented technology

The application discloses a privacy-enhanced data aggregation method supporting off-line fault tolerance and deviation correction. The method efficiently packs multi-dimensional data by using the Chinese remainder theorem, and realizes ciphertext aggregation without a fully trusted third party by introducing a collaborative mask based on neighbor relationship and a special mask shared by SM and CC, thereby guaranteeing data and identity privacy. Meanwhile, a deviation correction recovery mechanism executed unidirectionally by a control center is designed. The mechanism reconstructs a residual mask by using information such as a frozen candidate set and an effective participation set, thereby recovering a real aggregation result without requiring a node to respond secondly or an off-line node to supplement transmission. Performance evaluation shows that, compared with existing advanced schemes, DBPMDA reduces the additional communication and calculation overhead of the system in the case of device off-line, and is suitable for a resource-limited smart grid Internet of Things environment.

A communication method and apparatus, belonging to the field of communications, are disclosed. The method includes: a first module receiving a first parameter from a first network, the first parameter being a calculation parameter of a first security mechanism; the first module obtaining a second hidden identity identifier based on the first parameter, the second hidden identity identifier being a hidden identity identifier obtained by processing plaintext identity information according to the first security mechanism and the first parameter. A terminal-side device includes a first module supporting the first security mechanism and a second module not supporting the first security mechanism. The terminal-side device can first use the hidden identity identifier calculated by the second security mechanism to access the network, thereby using an anonymized identity identifier during network access to protect user privacy. The network side can issue calculation parameters of a first protection mechanism with higher security strength, enabling the terminal-side device to provide a higher level of security for user identity privacy protection during subsequent access processes.

A communication method and apparatus, relating to the field of communications. The communication method comprises: a first module in a terminal-side device acquires a first concealed identity identifier from a second module in the terminal-side device, the first concealed identity identifier being obtained by the second module by using a second security mechanism to process plaintext identity information; the first module, by using a first security mechanism, processes the first concealed identity identifier to obtain a second concealed identity identifier; and the first module sends the second concealed identity identifier to a first network, the second concealed identity identifier being used to access the first network. The first module can use the first security mechanism with higher security strength to further process the first concealed identity identifier computed by the second module, so as to obtain the second concealed identity identifier. In this way, when the first module accesses a network, the second concealed identity identifier computed by the first module can provide subscriber identity privacy protection with a higher security level.

The application provides an edge-computing-based blockchain node identity privacy scheme. The blockchain has the characteristics of high security, high transparency, high autonomy and non-tamperability, and has wide application prospects in the Internet of Things, finance, trade and other industries. However, due to the characteristics of decentralization, a more targeted security scheme is needed to protect user privacy, and the existing signature protection scheme has a large number of complex operations, which brings a large computing burden to the wireless terminal node. In combination with the advantages of edge computing and identity threshold short signature, the application provides an edge-computing-based blockchain node identity weighted threshold short signature scheme to ensure the identity privacy information of the blockchain node and resist collusion attacks.

The application discloses a kind of vehicle identity privacy protection methods based on blockchain in Internet of Vehicles, first according to the actual scene in Internet of Vehicles reality, system constructs alliance chain Hyperledger Fabric blockchain network, writes reputation score smart contract in chain code, sets reputation score for each vehicle, manages the reputation score of vehicle in reputation score smart contract, changes the reputation score of vehicle according to the behavior of vehicle;In the communication after vehicle enters, by on-board unit OBU determines which category the message belongs to, whether it needs to be encrypted, for the message that does not need to be encrypted, directly sent to network, and for the message that needs to be encrypted, after being encrypted, sent to specific user by RSU.The application protects vehicle identity privacy from tracking attack, and also prevents vehicle from spreading malicious messages, to establish a safe, reliable and efficient communication environment.

This invention proposes a drone swarm authentication method based on zero-knowledge proof, belonging to the field of drone swarm secure communication technology. Its technical solution includes the following steps: S1, system initialization; S2, secondary drone registration before takeoff; S3, bidirectional authentication and key negotiation between secondary drones during flight; S4, dynamic networking of secondary drones. This invention combines zero-knowledge proof and elliptic curve cryptography to achieve drone swarm identity authentication. Through a two-stage design of pre-registration and online authentication, it significantly reduces the computational and communication overhead of in-flight authentication while ensuring drone identity privacy and communication security. It effectively resists typical threats such as man-in-the-middle attacks, impersonation attacks, replay attacks, and message tampering, avoiding single points of failure and communication bottlenecks caused by the central node.

A communication method and apparatus, belonging to the field of communications, are disclosed. The method includes: a first module in a terminal-side device obtaining a first hidden identity identifier from a second module in the same device; the first hidden identity identifier being a hidden identity identifier obtained by the second module processing plaintext identity information using a second security mechanism; the first module processing the first hidden identity identifier using the first security mechanism to obtain a second hidden identity identifier; and the first module sending the second hidden identity identifier to a first network for accessing the first network. The first module can further process the first hidden identity identifier calculated by the second module using a first security mechanism with higher security strength to obtain the second hidden identity identifier. Thus, when the first module accesses the network, the second hidden identity identifier calculated by the first module can provide a higher level of security for user identity privacy protection.

This invention discloses a privacy-protecting, linkable mobile network voting method, relating to the field of data communication security technology. The method includes: setting security parameters and publishing public parameters based on these parameters; a management center generating certificates for users and organizations; the organization initiating a network vote, setting ballot information, and users selecting voting options based on the ballot information, randomly forming a user group, constructing a public key set based on the public keys of all users in the user group, and each user generating a valid ballot using their corresponding private key and the public key set after selecting a voting option; after receiving all ballots, the organization verifying the validity and relevance of the ballots. This invention can ensure the confidentiality of voting content, protect the privacy of voting users' identities, and prevent the abuse of voting power in network voting.