A Novel Hybrid Encryption Scheme against Adaptive Chosen Ciphertext Attack

Abstract

Many efficient CCA2-secure hybrid encryption schemes have been proposed, but their securities are based on too strong assumptions. It would be preferable to base a security proof on a weaker assumption, so we describe a practical hybrid encryption scheme based on the weaker LDDH assumption, and in the standard model prove to be CCA2-secure if the LDDH… (More)

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