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This paper investigates a mutual authentication scheme by making use of the visual secret sharing (VSS) scheme. The main concern of the investigated scheme is that it is easy for novice users to use the system. Novice users are seriously threatened by recently increasing phishing fraud. There are many technical countermeasures against phishing attacks, but those means are often too difficult for novice...
In 2004, Das et al. proposed a dynamic identity based remote user authentication scheme. They claimed that their scheme is secure against different attacks. Unfortunately, many researchers demonstrated that Das et al. scheme is vulnerable to various attacks. Furthermore, this scheme does not achieve mutual authentication and thus can not resist malicious server attack. In 2005, Liao et al. improved...
Distributed systems could be more secured with a distributed trust model based on either PKI or Kerberos. However, it becomes difficult to establish trust relationship across heterogeneous domains due to different actual trust mechanism and security policy as well as the intrinsic flaw of each trust model. This paper is to propose a new high-compatible model, capable of working under the condition...
Recently, Chang and Wu have proposed an efficient key agrement protocol suited for a multi-server environment. This work reviews Chang and Wu's protocol and provides a security analysis on the protocol. Our analysis shows that Chang and Wu's protocol does not achieve its fundamental goal not only of password security but also of mutual authentication. We demonstrate these security flaws by mounting...
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