Internet of things (IoT) privacy protection method and system for preventing ciphertext from being tampered based on CP-ABE

Abstract

The invention discloses an Internet of things (IoT) privacy protection method and an IoT privacy protection system for preventing ciphertext from being tampered based on CP-ABE. The method provides a ciphertext strategy attribute-based encryption mechanism, a vehicle node sending a message can autonomously develop an access strategy according to the attribute of the vehicle node receiving the message, the access strategy is deployed in the ciphertext, only the attribute of the vehicle node receiving the message is met, successful decryption can be achieved, and extremely strong flexibility is provided. Meanwhile, in order to prevent the sent message from being captured and tampered, a credible authorization center maps the ciphertext and a related parameter into a random number by using a Hash function, when performing decryption, a message accepter firstly verifies whether the message is tampered, and then decrypts the message if the message is not tampered. Not too much complex computation is introduced into the scheme; according to the scheme, interaction efficiency between the vehicle nodes is improved, while security of communication between the vehicle nodes in the Internet of things is ensured.

Description

technical field

[0001] The invention relates to a CP-ABE-based ciphertext tamper-proof privacy protection method and system for Internet of Vehicles. Background technique

[0002] In recent years, ITS (Intelligent Traffic System) has become the development direction of future transportation. As an extension of the Internet of Things in the field of intelligent transportation systems, the Internet of Vehicles is a core component of intelligent transportation systems. Through the comprehensive perception of roads and traffic, the Internet of Vehicles can realize large-scale and large-capacity data transmission and interaction among multiple transportation systems, and support real-time control of road vehicles, thereby improving traffic safety and traffic efficiency.

[0003] However, since the Internet of Vehicles network communicates through wireless channels, it will inevitably face many threats and attacks, such as: attackers inject false and wrong information into the In...

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