Abstract
The security of some special pervasive computing systems is very important, but generally speaking, the system resource of pervasive computing device is limited, so a cipher algorithm which possesses high security and low computational complexity is needed. This article puts forward a coupled chaos cipher algorithm based on the one dimensional logistic chaos mapping and piecewise linear chaos mapping, and gives the method to transform the outcome of the algorithm into binary sequence, then analyses the random statistical characteristic of the sequence generated by the algorithm, finally, gives a hardware implementation method of the algorithm.