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Deniable encryptions secure against adaptive chosen ciphertext attack. (English) Zbl 1291.94087

Ryan, Mark D. (ed.) et al., Information security practice and experience. 8th international conference, ISPEC 2012, Hangzhou, China, April 9–12, 2012. Proceedings. Berlin: Springer (ISBN 978-3-642-29100-5/pbk). Lecture Notes in Computer Science 7232, 46-62 (2012).
Summary: The deniable encryption is a type of encryption which can hide the true message while revealing a fake one. Even if the sender or the receiver is coerced to show the plaintext and the used random numbers in encryption, a deniable encryption scheme behaves like only an innocent message is encrypted. Because it protects privacy against malicious coercer, the deniable encryption is very useful in communication systems such as the cloud storage system when the communication channel is eavesdropped by a coercer. Previous deniable encryptions only concern the security under the adversary’s chosen plaintext attack (CPA). For non-interactive deniable encryptions, this paper introduce some security notions under adaptive chosen ciphertext attack (CCA). Furthermore, the first sender-deniable construction with deniability and indistinguishability against CCA attack is constructed.
For the entire collection see [Zbl 1239.68010].

MSC:

94A60 Cryptography
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