Policies in Accountable Contracts

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Policies in Accountable Contracts (2002)

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by Brian Shand , Jean Bacon

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5 - 0 self

BibTeX

@MISC{Shand02policiesin,
    author = {Brian Shand and Jean Bacon},
    title = {Policies in Accountable Contracts},
    year = {2002}
}

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Abstract

In this paper, accounting policies explicitly control resource usage within a contract architecture. Combined with a virtual resource economy, this allows efficient exchange of high-level computer services between untrustworthy participants. These services are specified as contracts, which must be signed by the participants to take effect. Each contract expresses its accounting policy using a limited language, with high expressiveness but predictable execution times. This is evaluated within a novel resource economy, in which physical resources, trust and money are treated homogeneously. A second-order trust model continually updates trustworthiness opinions, based on contract performance; trust delegation certificates support flexible, distributed extension of these trust relationships. The introspectible contracts, resource and trust models together provide accountability and resilience, which are particularly important for large-scale distributed computation initiatives such as the Grid. Thus participants can take calculated risks, based on expressed policies and trust, and rationally choose which contracts to perform.

Keyphrases

accountable contract novel resource economy virtual resource economy trust relationship expressed policy resource usage large-scale distributed computation initiative trustworthiness opinion accounting policy contract performance distributed extension untrustworthy participant calculated risk delegation certificate support trust model physical resource predictable execution time second-order trust model contract architecture introspectible contract limited language efficient exchange high expressiveness high-level computer service

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