An efficient conversion scheme for enhancing security of Diffie-Hellman-based encryption
Xi Zhang, Huanhua Hang · Wuhan University Journal of Natural Sciences · 2010
Nowadays, indistinguishability against adaptive chosen-ciphertext attacks (IND-CCA2) has been widely accepted as a proper security criterion for encryption schemes. In this paper, an efficient conversion is proposed to satisfy the IND-CCA2 security. It uses the random oracle methodology and the idea of hybrid encryption, and can enhance any Diffie-Hellman based encryption scheme, which is only one-way under plaintext-checking attack. Compared with other existing conversions, this conversion has the advantages of short ciphertext and low computation overhead, especially when it is applied to the multi-recipient setting.