DNA-chip-based dynamic broadcast encryption scheme with constant-size ciphertexts and decryption keys  

作　　者：FANG XiWen LAI XueJia 

机构地区：[1]Department of Computer Science and Engineering,Shanghai Jiao Tong University

出　　处：《Science China(Information Sciences)》2014年第9期122-131,共10页中国科学（信息科学）（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.61272440,61073149);Research Fund for the Doctoral Program of Higher Education of China(Grant No.20090073110027);State Key Laboratory of ASIC&System(Grant No.11KF0020);Key Lab of Information Network Security,Ministry of Public Security(Grant No.C11603);Scholarship Award for Excellent Doctoral Student granted by Ministry of Education

摘　　要：In this paper we present DNA-DBE,a DNA-chip-based dynamic broadcast encryption scheme. In our scheme,new users can join dynamically without modification of other users＇ decryption keys. Either the ciphertext or the decryption key is of constant-size. Backward secrecy is achieved in DNA-DBE： if new users join the system dynamically,they will not be able to retrieve past data. The security of our scheme relies on hard biological problems,which are immune to attacks of new computing technologies in the future. There exists a special feature in DNA–based cryptosystems,i.e. the set of encryption keys and the set of decryption keys have a many-to-many relationship. The implementation of more complicated DNA cryptosystems taking advantage of this special feature has been previously left as an open problem. Our DNA-DBE system is a solution to this open problem,which is also the first exploration of DNA based group-oriented encryption system.In this paper we present DNA-DBE,a DNA-chip-based dynamic broadcast encryption scheme. In our scheme,new users can join dynamically without modification of other users＇ decryption keys. Either the ciphertext or the decryption key is of constant-size. Backward secrecy is achieved in DNA-DBE： if new users join the system dynamically,they will not be able to retrieve past data. The security of our scheme relies on hard biological problems,which are immune to attacks of new computing technologies in the future. There exists a special feature in DNA–based cryptosystems,i.e. the set of encryption keys and the set of decryption keys have a many-to-many relationship. The implementation of more complicated DNA cryptosystems taking advantage of this special feature has been previously left as an open problem. Our DNA-DBE system is a solution to this open problem,which is also the first exploration of DNA based group-oriented encryption system.

关 键 词：DNA cryptography dynamic broadcast encryption group oriented cryptography DNA chip CRYPTOLOGY 

分 类 号：TN918.4[电子电信—通信与信息系统]