Universally Composable Three Party Password-authenticated Key Exchange Protocol
Deng Miao-lei① Wang Yu-lei② Zhou Li-hua①
①(College of Computer Science, Xidian University, Xi’an 710071, China) ②(Network Information Center, Nanyang Institute of Technology, Nanyang 473004, China)
Abstract:Many existing three Party Password-Authenticated Key Exchange (3PAKE) protocols are found insecure. An ideal functionality of 3PAKE is defined in the universal composability model,and a 3PAKE protocol is constructed to realize the 3PAKE ideal functionality in the hybrid model which aided by two party password-authenticated key exchange ideal functionality. The new protocol comprises of three phases: intermediate key generation, message authentication transmission and session key generation. The protocol is UC-secure, and has simpler structure.