Title: Data encipher and decipher system based on dynamic variable-length code
Application Number: 200410025874 Application Date: 2004.02.19
Publication Number: 1560823 Publication Date: 2005.01.05
Approval Pub. Date: 2006.11.22 Granted Pub. Date: 2006.11.22
International Classifi-cation: G09C1/00,H03M7/40
Applicant(s) Name: Li Chunlin Address: 710061
Inventor(s) Name:
Attorney & Agent: he ye
Abstract:
     The invention relates to an information security technology in information technology field, which concretely relates to binary code and decode of data. The invention belongs to sequence coding system; the essence is periodless multi-table code substituting method. It uses dynamic length variable code technology, a group of input data with fixed length (8 bits), the length of the output code is between 1 and 255, the size of the encrypted text is determined according to the state of the coding system. The state of the system will change after coding a group of plain text, and the initial state of the system is determined by the user key, the code analyzer is hard to determine the relation between the encrypted text and the plain text, thus the attacking method to each kind of system can be resisted effectively.
Time: 24