Title: Chaotic cipher production method under limited precision
Application Number: 200310109900 Application Date: 2003.12.31
Publication Number: 1556602 Publication Date: 2004.12.22
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: H04K1/00,H04L9/00
Applicant(s) Name: Huazhong Univ. of Science and Technology Address: 430074
Inventor(s) Name: Hu Hanping, Wu Xiaogang
Attorney & Agent: cao baojing
Abstract:
     The invention discloses a generating method for chaotic cipher in limited precise. The steps are: (1) initialization: generates in random or sets the initial value x1[i] (i=0; l=1, 2... n,) of the chaotic system, and sets with K kinds of variable carrying rules, k is equal or less than n; (2) the chaotic system output x j[i] (j=1, 2... n) correspondent to the carrying rule can be acquired with the K kinds of variable carrying rules according to the input xl [i]; (3) the outputs of different carrying rule x j [i] are converted into value with the same carrying rule x' j [i]; (4) the x' j[i] is coded according to the set coding rule and acquires x'' j[i]; (5) the n chaotic coding series x'' j [i] are arranged into M xi= M xi (I, j)=x'' j[i], xi=1, 2, ...; (6) xl [i 1]=x j[i] according to the set rule; (7) I=i 1, returns to the step (2), till the task is completed. The invention can reduce the correlation of series, increases the linear complexity, thus the chaotic series may has excellent performance.
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