Password-Authenticated Key Exchange protocol using ElGamal Encryption Scheme

• Main Author: 陳嘉宏
• Other Authors: 曾文貴
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/34146784221240024895

碩士 === 國立交通大學 === 資訊科學系 === 90 === Alice and Bob have shared a password (short, insecure), they want to authenticate each other and generate a session key(long, secure) by this password; then using this session key to encrypt messages between them and avoiding the data or information been intercepted by attacker on the insecure internet transmission and cause the intruders get the substance. This problem is called "Password-authenticated key exchange problem". Due to the length of their share password must be easy to remember for people, it means password can be attacked by some special facility approach. For example, Eavesdropping attack、Replay attack、Dictionary attack…etc. and then cause it lose the valuable password. Therefore, in this paper, we propose a password-authenticated key exchange protocol that can be able to resist those attack, and moreover providing a complete and security proof of the protocol that we proposed.