An attribute key distribution scheme based on low dependence trusted authorities

Aiming at the problem of “authority deception” and attribute restoration on the key distribution center, an attribute key distribution scheme under the environment of low reliance on trusted authorities is proposed in this paper. In this scheme, the users’ attributes are generated by the Cloud Storage Service Provider (CSSP), and then the attributes are divided into several attribute blocks and distributed to users. The user exchanges attribute blocks with other users and restore the attributes through the Chinese remainder theorem after receiving the attribute blocks. The multiple Key Management Centers (KMC) generate the attribute parameters according to the user attributes, and the last user calculates the attribute keys through the received attribute parameters. This scheme avoids the problem of “authority deception” and has high computational efficiency. Finally, the experimental results show that the program is safe and efficient. © 2018 Totem Publisher, Inc. All rights reserved.