The invention provides an authentication method for a virtual vehicle key. The authentication method is used for initiating authentication to vehicular equipment and comprises the following steps: transmitting authentication request information to the vehicular equipment; receiving first verification request information returned by the vehicular equipment after the authentication request information is confirmed by the vehicular equipment; verifying and confirming the first verification request information and then generating a session key according to the first verification request information; generating second verification request information containing the session key and transmitting the second verification request information to the vehicular equipment; receiving authentication response information with authentication result information and the session key, which is returned by the vehicular equipment after the vehicular equipment confirms the second verification request information. The authentication method has high safety coefficient.

Authentication method and authentication device for virtual vehicle key

The invention discloses a security identity authentication method with an antitracking characteristic, which comprises the following steps: system initialization of an identity register center IRC, wherein a private key x and a public key Q are generated, and system parameters {Ep(a, b), n, P} are selected; register of a user and an application server at the identity register center; and antitracking mutual authentication and key negotiation of the user and the application server. According to the security identity authentication method with an antitracking characteristic in the invention, a third-party authentication key and the historical context are applied to twice mutual authentication based on conventional authentication security so as to enhance the trust; an uncorrelated pseudonymis used for achieving the antitracking characteristic in an open network environment during information transmission so that the privacy of users using the open network is protected.

Security identity authentication method with antitracking characteristic

The invention discloses a communication connection method, a communication connection system and a storage medium, applied to an Internet of Things (IoT) equipment system The IoT equipment system comprises an authentication server, a network service management platform and a sensor node The method comprises the steps as follows: the authentication server initializes and opens a key parameter, sothat each node generates a public key and a private key according to the key parameter; the private key updates according to current time; when a sensor node request is added, an verification application sub-group is received via the network service management platform; the verification application sub-group is subjected to a decryption operation according to the private key at the current time,and identity information of the network service management platform and the sensor node are verified according to a decryption result; a verification result is sent to the network service management platform and the sensor node, so that any one of the network service management platform and the sensor node builds a communication connection after judging that the identity information of the other party is safe The security of communication between the equipment in the IoT equipment system is enhanced

Communication connection method and system, Internet of Things (IoT) equipment system and storage medium

A group key security management method is provided, comprising the steps: performing group key negotiation and initialization on user equipment in a group; distributing the initialized group key to all the user equipment in the group; and when detecting that the status of the user equipment in the group changes, performing group key negotiation and initialization again, and distributing the re-initialized group key to all the user equipment in the group. The invention further provides a group key security management device, electronic equipment and a storage medium. When any user equipment leaves or joins, the method can initialize the group key and redistribute the initialized group key to the user equipment in the group, thereby avoiding leakage of the group key, and reducing the amountof communication calculation while improving the communication security of the user equipment in the group.

Group key security management method and device, electronic equipment and storage medium

The invention is applicable to the field of data encryption. Provided are a data encryption method and a device thereof supporting a keyword sorting search technique of fuzzy matching and semantic approximation matching, and a data encryption retrieval system, which have complete functions and high efficiency. The initializing step of the method comprises the following steps of: extracting a keyword set from data and establishing an original keyword dictionary, and then establishing a corresponding keyword stem dictionary and a keyword synonym dictionary, and establishing a word vector for fuzzy matching of the keywords in the original keyword dictionary; The secret key generating step of the method comprises the following steps of: generating a corresponding secret key according to a plurality of dictionaries; The index building step comprises: according to dictionary and mapping relation, index vector is built for each document, and clustering is carried out; the data encryption stepcomprises: encrypting the index vector.

Data encryption method and device thereof, and data encryption retrieval system

The invention discloses a secure mutual authentication and key agreement protocol under the Internet of Things environment The secure mutual authentication and key agreement protocol comprises the following steps: step A, a registration phase: submitting own ID information to a server S by a user Ui, and registering to become a legal user; and step B, a login and authentication phase: performing two-way identity authentication and key agreement by the registered user Ui and the server S, and establishing a session key for the communication The secure mutual authentication and key agreement protocol under the Internet of Things environment provided by the invention solves the unsafe problems of information leakage and stealing of the two communication parties in the Internet of Things communication, and has higher performance and efficiency in the similar security protocols The invention adopts an elliptic curve cryptography algorithm, and realizes key negotiation and establishment with low consumption and high security on devices such as embedded devices and so on with limited computing power and storage resources

Secure mutual authentication and key agreement protocol under Internet of Things environment

The invention discloses a mutual anonymous authentication and key agreement protocol in a mobile network. The protocol is implemented as follows: step A, at a registration stage, a legal mobile device user initiates a request to register own information to a server; step B, the operation is carried out at an authentication and key agreement stage. Therefore, a server in a mobile network carries out authentication of an anonymous mobile device and session key sharing is established, so that privacy information of the two communication sides is protected from leakage; and security of the information transmission between the mobile devices is guaranteed. The protocol has high security and efficiency in the same kinds of protocols.

Mutual anonymous authentication and key agreement protocol in mobile network

The invention discloses a method for performing third-party auditing on a user file stored in a cloud server. The user file includes a plurality of data blocks. The method comprises the following steps executed on an auditing end: receiving a user auditing request from a user side; transmitting a challenge to the cloud server; verifying an evidence returned by the cloud server for the challenge; and transmitting an auditing result generated according to an evidence verification result to the user side. When data blocks of the user file are updated on the user side, the user side, the cloud server and the auditing end all execute a data block updating operation, including: data blocks and data block labels stored on the cloud server and a data block index table of the user file stored on the user side and the auditing end are updated correspondingly, wherein the data block index table at least includes current index subscripts of the data blocks. The evidence returned by the cloud server for the challenge is generated according to the data blocks and the data block labels stored in the cloud server.

Method for performing third-party auditing on user file stored in cloud server

The invention discloses a ciphertext searching method in a cloud storage system. The method comprises the following steps of receiving and storing a ciphertext of a keyword sent by a data owner; receiving a trap door used by a retrieval keyword sent by a data user; and matching the trap door and the ciphertext to obtain a search result, wherein the ciphertext is generated based on a private key ofthe data owner; the trap door is generated based on the private key of the data user; the private key of the data owner comprises a part of the private key generated by the data owner by utilizing akey generation center and a private value generated by the data owner; the private key of the data user comprises a part of the private key generated by the data user by utilizing the key generation center and the private value generated by the data user. According to the method, a problem of searchability of the ciphertext and a problem of security of the keyword in the cloud storage system can be solved in a certificateless public key encryption mode.

Ciphertext searching method in cloud storage system

The invention discloses a certificateless searchable public key encryption scheme safe in an industrial internet of things environment. The scheme comprises the following steps: A, a registration stage, in which a public key and a secret key of each of a data user and a cloud server are generated under assistance of a secret key generation center; B, a data encryption stage, in which keywords areencrypted by a data owner and ciphertext is uploaded to the cloud server; and C, a retrieval stage, in which a trap door used for retrieval by the data user is generated and sent to the cloud server,and the cloud server retrieves the ciphertext after receiving the trap door of the user and returns a retrieval result to the user. The invention provides a new scheme for solving the problems that amalicious server and keyword guessing attack of an external attacker exist in industrial internet of things cloud storage, and the scheme is proved to be capable of resisting to online keyword guessing attack of the external attacker and the malicious server and have higher security level in similar security protocols.

Wu Zuyang

Papers

Secure mutual authentication and key agreement protocol under Internet of Things environment

Mutual anonymous authentication and key agreement protocol in mobile network

Method for performing third-party auditing on user file stored in cloud server

Ciphertext searching method in cloud storage system

Certificateless searchable public key encryption scheme safe in industrial internet of things environment