Internet of Things data access control method and system based on block chain and IBE algorithm

Abstract

The invention discloses an Internet of Things data access control method and system based on a block chain and an IBE algorithm. A private key generation center PKG carries out system initialization, and constructs an alliance chain; Internet of Things equipment acquires data, encrypts the data to obtain a ciphertext, and sends the ciphertext to the Internet of Things gateway; the Internet of Things gateway sends the ciphertext to an Internet of Things system cloud platform or a local database for storage; a hash value corresponding to the ciphertext is generated, and the ciphertext identifier and a key value pair corresponding to the hash value are stored in the block chain; the PKG generates a private key; a data requester initiates a data request transaction on a block chain, an access control contract deployed on the block chain verifies validity of a data request, the PKG establishes a secure connection with the data requester to share a private key after verification is passed, and the data requester decrypts encrypted data by applying an IBE decryption algorithm to obtain request data. According to the invention, safe and credible fine-grained access control in an Internet of Things environment can be realized, and confidentiality, integrity and availability are satisfied.

Description

technical field [0001] The invention relates to an Internet of Things data access control method and system based on a block chain and an IBE algorithm, which solves the data access control problem existing in the Internet of Things system, and belongs to the technical field of cyberspace security. Background technique [0002] With the rapid development of information technology and the many needs of production and life, in addition to traditional computers and mobile phones, more and more sensing devices and smart terminals are connected to the network to collect and share data. The application of Internet of Things devices in daily life become more and more common. As an extension of the Internet, the Internet of Things has become the third wave of the development of the world's information industry after computers and the Internet. [0003] The ubiquitous interconnection of physical objects is significantly accelerated due to the rapid development of communication and n...

AI Technical Summary

Problems solved by technology

[0007] In view of the large amount of data circulation requirements among different IoT systems, and considering the huge number of IoT devices and their limited data, the purpose of the present invention is to provide an IoT data access control method and system based on blockchain and IBE algorithm, which can Obstacle data transmission security, and access control based on blockchain smart contracts and IBE algorithms, solving the problems of low efficiency of policy judgment, low efficiency of policy authority management, insufficient security, and lack of flexibility existing in the existing technology

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