To design a securer and easier constructed watermark, the biorthogonal integer wavelets with parameter based on lifting scheme is constructed, and a Hash function is built by transmutative Rijndael code.

An Integer Wavelet Transform with parameters is firstly constructed and the transmutative Rijndael code is used to construct a Hash function, and then a visible digital watermark algorithm based on the Integer Wavelet Translation with parameters, Discrete Cosine Transform (DCT) and the Transmutative Rijndael encryption algorithm are presented.

After simplification on the basis of mergence, it results that Rijndael cipher is substantially a nonlinear recurrence algorithm of affine permutation like Y=A(?)S(X)(?)K, which is illustrated with 128 bit block and .

Key-controlled Rijndael algorithm with multiple S-boxes;

Safety design of IC card medicare system based on Rijndael algorithm;

This paper introduces the concept of finite-field as well as Rijndael Algorithm structure,and also describes the design thinking of the key part in applying FPGA high speed operation in details based on the detailed analysis of the operation process of addition and multiplication on the GF(2~8) grounds in algorithm.