Method and system for dynamic s-box transformation
A transformation system and dynamic technology, applied in the direction of encryption device with shift register/memory, etc., can solve the problems of strengthening the input and output complexity of S-box transformation, and achieve the goal of improving running speed, saving hardware resources, and enhancing dependencies. Effect
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[0039] as attached figure 1 , 2 As shown, a dynamic S-box conversion method and system, the interface module includes a key register, an input information storage, an output information storage and a control signal register, to realize the reception, storage and transmission of keys, information and control signals; the S-box control The module includes a parity discriminator, an encryption and decryption controller, and a multiplication and accumulation unit controller to realize the dynamic control of the entire S-box transformation; the S-box transformation module includes a finite field GF(2 8 ) multiplicative inverse element converter and four multiply-accumulate operation units to realize the dynamic transformation of S-box transformation.
[0040] as attached figure 2 As shown, the finite field GF(2 8 ) There are 256 finite field GF(2 8 ) inverse element byte data, the byte data is the finite field GF(2 8 ) on 256 data with m(x)=x 8 +x 4 +x 3 +x+1 is the 256 in...
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