Improved unidirectional chosen-ciphertext secure proxy re-encryption
Zhao Guo-an, Fang Liming, Wang Jiandong, Chunpeng Ge, Ren Yongjun · 2010
At PKC'08, Libert and Vergnaud presented the first construction of unidirectional proxy re-encryption scheme with chosen-ciphertext security in the standard model. The limitation of their scheme is using one time signature. In this paper, an improved unidirectional chosen-ciphertext secure proxy re-encryption scheme is proposed. Our construction is more efficient than Libert and Vergnaud's scheme by avoiding one time signature.