PPP · Protecting and Preserving Human Knowledge for Posterity

The amount and variety of content being published online is growing at an exceptional rate. Online publishing enables content to reach a much larger audience than paper publishing but offers no guarantee of long-term access to the content. This work investigates techniques for building a large, reliable peer-to-peer system for the preservation of online published material. The system consists of a large number of low-cost, persistent web caches (peers) that cooperate to detect and repair damage by voting in ""opinion polls"" on the content of their cached documents. The peers are autonomous and mutually suspicious. Project activities include 1) investigating defenses against adversaries whose goal is to attack the preservation process