Chosen Ciphertext Secure Encryption under Factoring Assumption Revisited

Abstract

In Eurocrypt 2009, Hofheinz and Kiltz proposed a practical chosen ciphertext (CCA) secure public key encryption under factoring assumption based on Rabin trapdoor one-way permutation. We show that when the modulus is special such that Z∗ N has semismooth order, the instantiation of Hofheinz-Kiltz 09 scheme (HK09) over a much smaller subgroup of quadratic… (More)
DOI: 10.1007/978-3-642-19379-8_13

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