On the Matsumoto and Imai's human identification scheme

Authors:
Chih-Hung Wang;Tzonelih Hwang;Jiun-Jang Tsai
Affiliations:
Institute of Information Engineering, National Cheng-Kung University, Tainan, Taiwan, R.O.C.;Institute of Information Engineering, National Cheng-Kung University, Tainan, Taiwan, R.O.C.;Institute of Information Engineering, National Cheng-Kung University, Tainan, Taiwan, R.O.C.
Venue:
EUROCRYPT'95 Proceedings of the 14th annual international conference on Theory and application of cryptographic techniques
Year:
1995

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Abstract

At Eurocrypt'91, Matsumoto and Imai presented a human identification scheme for insecure channels, which is suitable for human ability of memorizing and processing a short secret. It prevents an intruder from peeping user in typing password on terminal connected to the central computer. However, in this paper, we are going to propose a new attack, called the replay challenge attack, where a malicious terminal pretends to be the host and replays the host's challenges to reveal the secret password. A modified scheme will be proposed to avoid this attack.