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Adaptive versus Non-Adaptive Security of Multi-Party Protocols |
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| Authors: | Ran Canetti Ivan Damgard Stefan Dziembowski Yuval Ishai Tal Malkin |
| Affiliation: | (1) IBM Research, 19 Skyline Drive, Hawthorne, NY 10532, USA;(2) BRICS, Aarhus University, Aabogade 34, DK-8000 Aarhus C, Denmark;(3) Institute of Informatics, University of Warsaw, Banacha 2, PL-02-D97 Warsaw, Poland;(4) Department of Computer Science, Technion, Haifa 32000, Israel;(5) Computer Science Department, Columbia University, New York, NY 6027-7003, USA |
| Abstract: | Security analysis of multi-party cryptographic protocols distinguishes betweentwo types of adversarial settings: In the non-adaptive setting the set of corruptedparties is chosen in advance, before the interaction begins. In the adaptive setting theadversary chooses who to corrupt during the course of the computation. We studythe relations between adaptive security (i.e., security in the adaptive setting) and nonadaptivesecurity, according to two definitions and in several models of computation. |
| Keywords: | Multi-party protocols Definitions of security Adaptive security |
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