Book resource access control method based on ciphertext attribute authentication and threshold function

Abstract

The invention provides a book resource access control method based on ciphertext attribute authentication and a threshold function. The book resource access control method comprises the following steps that an authentication center and terminal members generate respective public / private key pairs; the terminal members interact with the authentication center to perform attribute authentication to obtain permission level values, and each terminal member sends the public key and the permission level value to the authentication center, and sends the public key and the permission level value to thecloud service platform after verification; the terminal member calculates an encryption key and a decryption key, encrypts the shared resource information into a ciphertext and uploads the ciphertextto the cloud service platform; and the terminal member determines a ciphertext resource to be checked according to the ciphertext, the cloud service platform verifies the identity of the ciphertext resource and opens an access link of the ciphertext resource, and the terminal member downloads the ciphertext for decryption. Personal privacy is protected by adopting a ciphertext attribute authentication technology, access permission is controlled by setting a threshold function to guarantee the safety of resource sharing, and collusion attack is prevented by adopting identity and permission dual authentication, so that information resource sharing in the Internet of Things is more flexible, efficient and practical.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a book resource access control method based on ciphertext attribute authentication and a threshold function. Background technique [0002] The development of the Internet of Things has led to the great development of data sharing and data interaction, making security and privacy more and more concerned by users. How to ensure the safe sharing of data, avoid the leakage of sensitive information, and protect the privacy of users is a severe challenge. Access control is an important guarantee to ensure the trust of the Internet of Things. The threshold function is set to divide access rights, and users with different rights can access information with different sensitivity levels, which avoids the leakage of sensitive information and realizes fine-grained, flexible and safe access to cloud server data. [0003] The library is a complex and numerous information library....

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problem that in the identity authentication process of the existing information encryption access method, personal identity information is easily exposed, and the information sensitivity is high, and the access authority of the terminal members in the domain cannot be determined, the present invention proposes a method based on ciphertext attribute authentication and The book resource access control method of the threshold function uses the identity authentication technology of hidden attributes to realize personal privacy protection in the identity authentication process of resource information sharing, and uses the threshold function to divide the access rights technology to reduce the calculation and communication costs of each participant. Joint authentication of identity and authority is adopted to avoid collusion attacks by terminals without authority

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