Robust User Password Change Scheme based on the Elliptic Curve Cryptosystem

Authors:
Eun-Jun Yoon;Kee-Young Yoo
Affiliations:
School of Electrical Engineering and Computer Science, Kyungpook National University, 1370 Sankyuk-Dong, Buk-Gu, Daegu 702-701, South Korea ejyoon@tpic.ac.kr;(Correspd.) Department of Computer Engineering, Kyungpook National University, 1370 Sankyuk-Dong, Buk-Gu, Daegu 702-701, South Korea. yook@knu.ac.kr
Venue:
Fundamenta Informaticae
Year:
2008

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Abstract

In this paper, an efficient user password change scheme based on the elliptic curve discrete logarithm problem (ECDLP) is presented. In contrast to the existing password change schemes using a server's public key, the proposed scheme can securely update user passwords without a complicated process and server's public key, and also provides explicit key authentication in the case of a session key agreement.