Welcome to the resource topic for 2004/331
Title:
Code-Based Game-Playing Proofs and the Security of Triple Encryption
Authors: Mihir Bellare, Phillip Rogaway
Abstract:The game-playing technique is a powerful tool for analyzing cryptographic constructions. We illustrate this by using games as the central tool for proving security of three-key triple-encryption, a long-standing open problem. Our result, which is in the ideal-cipher model, demonstrates that for DES parameters (56-bit keys and 64-bit plaintexts) an adversary’s maximal advantage is small until it asks about 2^{78} queries. Beyond this application, we develop the foundations for game playing, formalizing a general framework for game-playing proofs and discussing techniques used within such proofs. To further exercise the game-playing framework we show how to use games to get simple proofs for the PRP/PRF Switching Lemma, the security of the basic CBC~MAC, and the chosen-plaintext-attack security of OAEP.
ePrint: https://eprint.iacr.org/2004/331
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