Improved IDEA

A group signature scheme is a digital signature scheme that allows a group member to sign messages anonymously on behalf of the group. Recently, Tseng and Jan proposed two group signature schemes based on self-certified and ID-based public keys ...

Integral attack, as a powerful technique in the cryptanalysis field, has been widely utilized to evaluate the security of block ciphers. Integral distinguisher is based on balanced property on output with probability one. To obtain a distinguisher ...

Convertible authenticated encryption (CAE) schemes allow a signer to produce an authenticated ciphertext such that only a designated recipient can decrypt it and verify the recovered signature. The conversion property further enables the designated ...