Stream Cipher Generator, Random Digit Generation Method, Encrypting System and Encryption Method
Abstract
The stream cipher generator comprises three linear feedback shift registers and three linear transforming modules, the three linear transforming modules respectively make configuration for the three linear feedback shift registers; three state reading-out table modules, A, B and C, which respectively read out the data of pre-position in the three linear feedback shift registers; a linear conversion module F for inputting the data outputted from the three sate reading-out table modules, and compressing and scrambling it, and then outputting it; a table looking-up transform module D for compressing and outputting the data outputted from the state reading-out table module; an outputting module for compressing and outputting the data outputted from F, D and C. The stream cipher generator can be allocated at both transmission ends to make synchronized symmetry encryption.
