New method for signal encryption using blind source separation based on subband decomposition  

作　　者：Zuyuan Yang Guoxu Zhou Zongze Wu Jinlong Zhang 

机构地区：[1]School of Electrics and Information Engineering, South China University of Technology, Cruangzhou 510641, China

出　　处：《Progress in Natural Science:Materials International》2008年第6期751-755,共5页自然科学进展·国际材料（英文版）

基　　金：National Natural Science Foundation of China（Grant Nos.U0635001,60674033,60774094）;the Natural Science Fund of Guangdong Province, China（Grant No.05006508）.

摘　　要：A novel cryptosystem based on subband decomposition independent component analysis(SDICA)is proposed in this work,where no assumption of independence for the ciphers and the plaintexts is required.In the proposed cryptosystem,the encryption is asynchronous,i.e.the plaintexts are mixed mutually firstly and then mixed with the ciphers.In addition,the decryption is asynchronous,such that the decryption accuracy of the plaintexts can be enhanced.Some special information about the original mixing matrix is used for solving the indeterminacy of the permutation and scale of columns of the recovered mixing matrix in SDICA,instead of the characteristics of the plaintexts.Simulations are given to illustrate security and availability of our cryptosystem.A novel cryptosystem based on subband decomposition independent component analysis （SDICA） is proposed in this work, where no assumption of independence for the ciphers and the plaintexts is required. In the proposed cryptosystem, the encryption is asynchronous, i.e. the plaintexts are mixed mutually firstly and then mixed with the ciphers. In addition, the decryption is asynchronous, such that the decryption accuracy of the plaintexts can be enhanced. Some special information about the original mixing matrix is used for solving the indeterminacy of the permutation and scale of columns of the recovered mixing matrix in SDICA, instead of the characteristics of the plaintexts. Simulations are given to illustrate security and availability of our cryptosystem.

关 键 词：SDICA Signal encryption BSS 

分 类 号：TP14[自动化与计算机技术—控制理论与控制工程]