Intrusion-tolerant system design for web server survivability

Abstract

Internet becomes more and more popular, and most companies and institutes use web services for e-business to promote their business. As results, Internet and web services become core infrastructure for a business and become more and more important, but attacks against web services increase as the popularity of web services grows. Therefore, there are increasing needs of undisrupted web services despite of attacks. In this paper, contrast to previous approaches that detect and filter known attacks using known vulnerabilities and patterns, we proposed an intrusion tolerant system that can tolerate known vulnerabilities as well as unknown vulnerabilities by providing adaptation, redundancy and diversity. After detecting attacks, the system provides continuous web services using server adaptation and request filtering. © Springer-Verlag 2004.