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Title:
A Black-Box Construction of a CCA2 Encryption Scheme from a Plaintext Aware Encryption Scheme
Authors: Dana Dachman-Soled
Abstract:We present a construction of a CCA2-secure encryption scheme from a plaintext aware, weakly simulatable public key encryption scheme. The notion of plaintext aware, weakly simulatable public key encryption has been considered previously by Myers, Sergi and shelat (SCN, 2012) and natural encryption schemes such as the Damgård Elgamal Scheme (Damgård, Crypto, 1991) and the Cramer-Shoup Lite Scheme (Cramer and Shoup, SIAM J. Comput., 2003) were shown to satisfy these properties. Recently, Myers, Sergi and shelat (SCN, 2012) defined an extension of non-malleable CCA1 security, called cNM-CCA1, and showed how to construct a cNM-CCA1-secure encryption scheme from a plaintext aware and weakly simulatable public key encryption scheme. Our work extends and improves on this result by showing that a full CCA2-secure encryption scheme can be constructed from the same assumptions.
ePrint: https://eprint.iacr.org/2013/680
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