International Journal of Advanced Research in Computer Science and Software Engineering (IJARCSSE)
Multi-tier architecture in web endures many attacks and several methodologies to overcome these attacks. Although, abundant anti-attack system exists a single protocol to overcome multifarious attacks at a time is not available. When more than two anti-attack systems implemented it leads to performance degradation or encumbrance. Apart from system attacks there exists other menace that includes Denial of Service (DoS), intrusion, session hijack, privilege escalation and SQL injection attack. In this paper, the authors establish a protocol that proposes a new virtual lock and categorizes two levels of scrutiny. In primary level itself threshold checked to imminent attacks so the secondary in-depth level check done and invokes corresponding anti-attack application thus to eliminate performance degradation in multi-tier web services.