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Opinion Polls can be used as a means to reach weak agreement, an
idea introduced by the LOCKSS system [1]. In this paper, we
investigate a set of protocols that achieve data resilience for the
long-term using a peer-to-peer network, where mutually untrusted peers
are loosely organized. Peers use Opinion Polls to heal corrupted
copies of data items instead of conventional methods that use
consensus algorithms or cryptography to sign data. We give a brief
overview of how LOCKSS performs Opinions, improve the current
algorithms, and evaluates our protocols in terms of their performance
and security against adversary attacks.
*N. Michalakis is with the Massachusetts Institute of Technology. This
work was done while an intern at Sun Microsystems Laboratories.
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