Title	A Simple Attack on a Recently Introduced Hash-Based Secure User Authentication Scheme
Author	Minho Kim, ?etin Kaya Ko?
Citation	Vol. 6  No. 5  pp. 157-160
Keywords	Hash function, user authentication, stolen-verifier attack, denial-of-service attack

Title	Enhanced Security for the Modified Authenticated Key Agreement Scheme
Author	Minho Kim, ?etin Kaya Ko?
Citation	Vol. 6  No. 7  pp. 164-169
Keywords	Key agreement, modification attack, off-line guessing attack, man-in-the-middle attack, reflection attack