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 ...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.展开更多
基金Supported by the National Natural Science Foundation ofChina (60903178)
文摘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.
