Internet of vehicles-based entrustable inner product predicate encryption method

Through the hierarchical delegation mechanism and inner product predicate encryption method, the problems of low key management efficiency and poor data security in the Internet of Vehicles are solved, efficient key management and data encryption are achieved, the scalability and security of the system are improved, and the real-time requirements of the Internet of Vehicles are adapted.

CN120692545APending Publication Date: 2025-09-23CHONGQING JIAOTONG UNIV
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Patent Information

Application Number
CN202510880833.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-27
Publication Date
2025-09-23

AI Technical Summary

Technical Problem

Existing technologies make it difficult to efficiently manage keys in the Internet of Vehicles, resulting in low key management efficiency and poor system scalability. In addition, existing encryption methods cannot effectively solve the problems of data security and privacy protection in the Internet of Vehicles.

Method used

A hierarchical delegation mechanism is adopted to divide vehicle identities into multiple levels. The upper-level vehicle delegates a new secret key to the lower-level vehicle as the identity secret key of the lower-level vehicle. The identity key is generated by the trusted management center, and the data is encrypted in combination with the inner product predicate encryption method to achieve fine-grained access control and data processing.

Benefits of technology

It improves the efficiency of key management, enhances the scalability and security of the Internet of Vehicles system, ensures that data is not illegally interpreted during transmission and storage, supports partial calculations in encrypted state, and adapts to the real-time requirements of the Internet of Vehicles.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of Internet of Vehicles and data encryption, in particular to a deletable inner product predicate encryption method based on Internet of Vehicles, which comprises the following steps: S1, distributing an identity to a current vehicle through a trusted management center, generating an identity key for the vehicle, and generating an identity key for the vehicle through a hierarchical delegation mechanism; s2, the data owning vehicle encrypts the data vector based on the identity of the data receiving vehicle to obtain a data ciphertext; s3, the data receiving vehicle generates a transformation key for auxiliary decryption calculation of the cloud server by using an identity private key of the data receiving vehicle; s4, the cloud server performs partial decryption on the data ciphertext based on the transformation key to obtain a semi-decrypted ciphertext; and S5, calculating a predicate vector inner product by the data receiving vehicle in combination with the local private key and the semi-decrypted ciphertext, and judging that the data owning vehicle and the data receiving vehicle meet a predicate relationship, namely a decryption relationship, based on the predicate vector inner product. According to the invention, the efficiency of key management and the expandability and security of the Internet of Vehicles system can be improved.
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