In 2006, Manik et al. proposed a novel remote user authentication scheme using bilinear pairings. Chou et al. identified a weakness in Manik et al.'s scheme and improved the scheme. And besides, Thulasi et al. pointed that both Manik et al.'s and Chou et al.'s schemes are vulnerable to forgery attacks and replay attacks. In this paper, we analyze the previous schemes based on a timestamp and provide further comments and an improved scheme using a nonce. Our scheme also provides mutual authentication between a user and a remote server while the previous schemes only provided unilateral authentication.
['Jun-Cheol Jeon', 'Byung-Heon Kang', 'Se-Min Kim', 'Wan-Soo Lee', 'Kee-Young Yoo']
An improvement of remote user authentication scheme using smart cards