Subtleties in the Definition of IND-CCA: When and How Should Challenge Decryption Be Disallowed?

IND-CCA (indistinguishability under adaptive chosen-ciphertext attacks) is a central notion of security for public-key encryption, defined and targeted in many papers. Non-triviality of the notion requires that the adversary not query the challenge ciphertext to the decryption oracle. We point out t...

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Veröffentlicht in:	Journal of cryptology 2015-01, Vol.28 (1), p.29-48
Hauptverfasser:	Bellare, Mihir, Hofheinz, Dennis, Kiltz, Eike
Format:	Artikel
Sprache:	eng
Schlagworte:	Algorithms Coding and Information Theory Combinatorics Communications Engineering Computational Mathematics and Numerical Analysis Computer Science Encryption Equivalence Networks Probability Theory and Stochastic Processes
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