Robust User Password Change Scheme based on the Elliptic Curve Cryptosystem

Article type: Research Article

Authors: Yoon, Eun-Jun | Yoo, Kee-Young

Affiliations: School of Electrical Engineering and Computer Science, Kyungpook National University, 1370 Sankyuk-Dong, Buk-Gu, Daegu 702-701, South Korea [email protected] | Department of Computer Engineering, Kyungpook National University, 1370 Sankyuk-Dong, Buk-Gu, Daegu 702-701, South Korea. [email protected]

Note: [] Address for correspondence: Department of Computer Engineering, Kyungpook National University, 1370 Sankyuk-Dong, Buk-Gu, Daegu 702-701, South Korea.

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.

Keywords: Cryptography, Password authentication, Password change, Key agreement

Journal: Fundamenta Informaticae, vol. 87, no. 3-4, pp. 483-492, 2008