一个高效的基于身份的分层加密方案

摘要

基于Gentry方案,利用双线性配对,提出了一个高效的基于身份的分层加密方案,在随机预言机模型下证明满足IND-ID-CCA2安全,通过分析,该方案较Gentry方案缩短了密文长度,解密仅需要进行一次双线性配对,大大提高了加密和解密的效率.%This paper proposes an efficient hierarchical id-based encryption scheme with bilinear pairing, which is based on Gentry scheme. This scheme meets IND-ID-CCA2 security in the random oracle model. This scheme reduces the ciphertext length, and only computes bilinear pairing once in the decryption, which increases the efficiency of encryption and decryption, compared with Gentry scheme.