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Erschienen in:
2012 | OriginalPaper | Buchkapitel
Standard Security Does Not Imply Security against Selective-Opening
verfasst von : Mihir Bellare, Rafael Dowsley, Brent Waters, Scott Yilek
Erschienen in: Advances in Cryptology – EUROCRYPT 2012
Verlag: Springer Berlin Heidelberg
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We show that no commitment scheme that is hiding and binding according to the standard definition is semantically-secure under selective opening attack (SOA), resolving a long-standing and fundamental open question about the power of SOAs. We also obtain the first examples of IND-CPA encryption schemes that are not secure under SOA, both for sender corruptions where encryption coins are revealed and receiver corruptions where decryption keys are revealed. These results assume only the existence of collision-resistant hash functions.