Research of quantization methods and pseudo-randomness based on chaotic systems.

In order to discuss the effectiveness of the pretreatment method in literature 1, this paper adopted threshold and the way used the change T to quantify the real chaotic sequences which generated before and after pretreatment into binary sequences, respectively. Finally, it detected the 20 000 binary number sequences generated after quantization by the standard of FIPS 140-2 tests. The results indicate that the chaos sequences pretreated have good statistical properties. The randomness of 0-1 sequences after pretreatment with threshold quantization has very obviously improved by analysis of two quantitative methods. The randomness of 0-1 sequences use the change T is often better than the ones use threshold quantization whether using pre treated or not. [ABSTRACT FROM AUTHOR]