CCA2 Secure Fuzzy Identity-Based Encryption with Constant Size Ciphertexts in the Standard Model
GE Ai-ju · Dianzi xuebao · 2013
Fuzzy identity-based encryption can provide an erro-r tolerance property for identity-based systems, and it allows a sender to encrypt a message to all users who have a certain set of attributes. In this paper, we proposed a fuzzy identity-based encryption scheme with constant size of ciphertexts that is indistinguishable against adaptive chosen ciphertexts attacks(CCA2) in the standard model. Compared with other existing schemes, this construction can satisfy the application requirements, as it can pro vide better efficiency in terms of the communication and computation co st as well as a stronger security guarantee.