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USENIX
2003

A Cooperative Internet Backup Scheme

13 years 5 months ago
A Cooperative Internet Backup Scheme
We present a novel peer-to-peer backup technique that allows computers connected to the Internet to back up their data cooperatively: Each computer has a set of partner computers, which collectively hold its backup data. In return, it holds a part of each partner’s backup data. By adding redundancy and distributing the backup data across many partners, a highly-reliable backup can be obtained in spite of the low reliability of the average Internet machine. Because our scheme requires cooperation, it is potentially vulnerable to several novel attacks involving free riding (e.g., holding a partner’s data is costly, which tempts cheating) or disruption. We defend against these attacks using a number of new methods, including the use of periodic random challenges to ensure partners continue to hold data and the use of disk-space wasting to make cheating unprofitable. Results from an initial prototype show that our technique is feasible and very inexpensive: it appears to be one to tw...
Mark Lillibridge, Sameh Elnikety, Andrew Birrell,
Added 01 Nov 2010
Updated 01 Nov 2010
Type Conference
Year 2003
Where USENIX
Authors Mark Lillibridge, Sameh Elnikety, Andrew Birrell, Michael Burrows, Michael Isard
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