Date Added: Aug 2011
In this paper, the authors fully deal about the concept of enormous spam e-mails directed at large numbers of recipients, designing effective collaborative anti-spam systems raises several important research challenges. Since e-mails may contain confidential information, any collaborative anti-spam approach has to guarantee strong privacy protection to the participating entities. Second, the continuously evolving nature of spam demands the collaborative techniques to be resilient to various kinds of camouflage attacks. Third, the collaboration has to be lightweight, efficient, and scalable. Toward addressing these challenges, to achieve all the above statements they create a frame work called as privacy-aware framework for collaborative spam filtering) through which they control the spam attacks.