Anzeige
Erschienen in:
2005 | OriginalPaper | Buchkapitel
Handling Expected Polynomial-Time Strategies in Simulation-Based Security Proofs
verfasst von : Jonathan Katz, Yehuda Lindell
Erschienen in: Theory of Cryptography
Verlag: Springer Berlin Heidelberg
Aktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
The standard class of adversaries considered in cryptography is that of
strict
polynomial-time probabilistic machines (or circuits). However,
expected
polynomial-time machines are often also considered. For example, there are many zero-knowledge protocols for which the only simulation techniques known run in expected (and not strict) polynomial-time. In addition, it has been shown that expected polynomial-time simulation is
essential
for achieving constant-round black-box zero-knowledge protocols. This reliance on expected polynomial-time simulation introduces a number of conceptual and technical difficulties. In this paper, we develop techniques for dealing with expected polynomial-time adversaries in the context of simulation-based security proofs.