The LOCKSS project has developed and deployed in a worldwide test a peer-to-peer system for preserving access to journals and other archival information published on the Web. It consists of a large number of independent, low-cost, persistent web caches that cooperate to detect and repair damage to their content by voting in "opinion polls." Based on this experience, we present a design for and simulations of a novel protocol for voting in systems of this kind. It incorporates rate limitation and intrusion detection to ensure that even some very powerful adversaries attacking over many years have only a small probability of causing irrecoverable damage before being detected.

urpose of the Organization is to create, promote and sustain all aspects of a Networked Digital Library of Thesis and Dissertations. The goals are to improve graduate education, promote access to scholarly research, increase sharing of knowledge, help universities build their information infrastructure, and extend the beneficial impact of digital libraries. Our draft bylaws say that the purpose of the Organization is to create, promote and sustain, sustain! all aspects of a Networked Digital Library of Thesis and Dissertations. ETD 2003 Berlin Conference NDLTD's activities are focused on universities... to support... archiving... NDLTD's vision is to increase the availability of student research documents for scholars and to preserve it electronically. The 6th conference web site also calls attention to preservation, specifically mentioning focusing on archiving and retrieval of electronic theses and dissertations worldwide as well as increasing the availability of student research