In present era, the world is highly dependent on the Internet and it is considered as main infrastructure of the global information society. Therefore, the Availability of information and services is very critical for the socio-economic growth of the society. However, the inherent vulnerabilities of the Internet architecture provide opportunities for a lot of attacks on its infrastructure and s...

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Abstract Recently, many biometrics-based user authentication schemes using smart cards have been proposed to improve the security weaknesses in user authentication system. In 2006, Khan et al.[12] proposed an improved fingerprint-based remote user authentication scheme using smart cards that is achieved mutual authentication between the user and the server, while eliminating the drawback of Lee...

Application Layer Distributed Denial of Service (App-DDoS) attack has become a major threat to web security. Attack detection is difficult as they mimic genuine user request. This paper proposes a clustering based correlation approach for detecting application layer DDoS attack on HTTP protocol. Proposed approach has two main modules ----Flow monitoring module and User behavior monitoring modul...

Recently, with the appearance of smart cards, many user authentication protocols using smart card have been proposed to mitigate the vulnerabilities in user authentication process. In 2004, Das et al. proposed a ID-based user authentication protocol that is secure against ID-theft and replay attack using smart card. In 2009, Wang et al. showed that Das et al.’s protocol is not secure to randoml...

User authentication is one of the fundamental procedures to provide secure communications between user and server over an insecure public channel. Recently, Wang et. al. proposed password-based user authentication scheme based on hash function and modular exponentiation and they claimed that their scheme provides strong authentication than related scheme. But in this paper, it is pointed out th...

T ransitioning to a new architecture is never easy. Users want to keep running their favorite applications as they normally would, without stopping to adapt them to a different platform. For some legacy applications the problem is more severe. Without all the source code, it is impossible to recompile the application to a new platform. Thus, porting these legacy applications is not just slow—it...