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—More and more malware writers are taking advantage of rootkits to shield their illegal activities. Any computer security products that are not equipped with the anti-rootkit functionality may not identify this kind of threat. Thus, the role of a rootkit detector is becoming extremely important. Though much research has been focused on kernel data to(More)
A deniable authentication protocol enables a receiver to identify the true source of a given message, but not to prove the identity of the sender to a third party. This property is very useful for providing secure negotiation over the Internet. Consequently , many interactive and non-interactive deniable authentication protocols have been proposed. However,(More)
—Online social networks (OSNs) such as Facebook and MySpace are flourishing because more and more people are using OSNs to share their interests with friends. Because security and privacy issues on OSNs are major concerns, we propose a security framework for simultaneously authenticating multiple users to improve the efficiency and security of peer-to-peer(More)
Recently, Tsaur et al. proposed an authentication scheme for multi-server environments and claimed their scheme could withstand various attacks. In this letter, we will point out that Tsaur et al. scheme is not suitable for multi-server environments since the user has to register for every server. Furthermore, we will show Tsaur et al. scheme is vulnerable(More)