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Paper 2013/680

A Black-Box Construction of a CCA2 Encryption Scheme from a Plaintext Aware Encryption Scheme

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.

Metadata
Available format(s)
PDF
Category
Public-key cryptography
Publication info
Preprint. MINOR revision.
Keywords
CCA2-secure encryptionplaintext aware encryptionweakly simulatable public key encryptionblack-box
Contact author(s)
danadach @ ece umd edu
History
2013-10-24: received
Short URL
https://ia.cr/2013/680
License
Creative Commons Attribution
CC BY
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