Poster: temporal attribute-based encryption in clouds

Authors:
Yan Zhu;Hongxin Hu;Gail-Joon Ahn;Xiaorui Gong;Shimin Chen
Affiliations:
Peking University, Beijing, China;Arizona State University, Tempe, AZ, USA;Arizona State University, Tempe, AZ, USA;Peking University, Beijing, China;Peking Univeristy, Beijing, China
Venue:
Proceedings of the 18th ACM conference on Computer and communications security
Year:
2011

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Abstract

There has been little work that explores cryptographic temporal constraints, especially for data sharing in cloud computing. In this paper, we present a temporal attribute-based encryption (TABE) scheme to implement temporal constraints for data access control in clouds. This scheme has a constant size for ciphertext, private-key, and a nearly linear-time complexity. In addition, we implement a prototype system to evaluate our proposed approach. Our experimental results not only validate the effectiveness of our scheme and algorithms, but also show our scheme has better performance for integer comparison than BSW's bitwise comparison scheme.