An Efficient Conversion Scheme for Enhancing Security of Diffie-Hellman-Based Encryption  

作　　者：ZHANG Xi,HANG Huanhua College of Computer and Software,Shenzhen University,Shenzhen 518060,Guangdong,China 

出　　处：《Wuhan University Journal of Natural Sciences》2010年第5期415-421,共7页武汉大学学报（自然科学英文版）

基　　金：Supported by the National Natural Science Foundation ofChina (60903178)

摘　　要：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.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.

关 键 词：Diffie-Hellman-based encryption adaptive chosenciphertext attack multi-recipient setting randomness-reusing 

分 类 号：TP305[自动化与计算机技术—计算机系统结构]