Trust and accountability issues in scalable invalidation-based web cache consistency

Abstract

Web cache consistency is a popular problem in literature. There are a number of web cache consistency schemes, of which the invalidation-based approach is known to be most promising for improving the freshness of cached content. Yu et al. [27] proposed a scalable architecture for invalidation-based web cache consistency but it does not address the issue of trust and accountability for propagation of invalidations across several administrative domains. To address that issue, this article proposes an architecture called FIAT. In designing FIAT, we are concerned with trust and accountability issues that are likely to be encountered in designing a global event notification service. Since invalidation-based web cache consistency is a relatively well-studied problem, the discussion becomes easier if we use web cache consistency as the running theme of this paper.