摘要
Chen proposes a signature with message recovery which is called anauthenticated encryption scheme or simply a signcryption. In this short note, we show that Chen'ssignature scheme has some mistakes and propose three modified versions.
Chen proposes a signature with message recovery which is called anauthenticated encryption scheme or simply a signcryption. In this short note, we show that Chen'ssignature scheme has some mistakes and propose three modified versions.
基金
ThisworkissupportedbytheNationalScienceFoundationsofChina (No.90 1 0 4 0 0 4 )