Research And Applications On Technology Of Randomness Test For Analog Signals

Cryptography technologies is the core of information security,and the randomicity has important position in cryptography,therefore the study of random testing used for evaluating randomicity of given analog random signal is very important in cryptography and even information security.This subject relies on the requirement of scientific research project —The random signal testing and analyzing system,and the research emphasis is random testing techonology and its application aimed on the analog random signal generated by Random number generator.Firstly,this paper analyzes the current analog signal random testing technology,and describes using entropy measure is more accurate and scientific to estimate the randomicity of signal by contrast.Then,this paper discussed detailedly random testing method based on entropy measure,this method can satisfy nicely the demand of random signal evaluation.According to the study of random testing technology,this paper proposes a new kind of entropy steady testing method,this method improves the old testing project synthetically,and through entropy steady,many-sided quality of examined signal can be investigated.On the basis of analyzing and investigating the random testing technology,this paper discusses the design and realization of a random testing system.The system can satisfy nicely the requirements of random testing for analog random signal in random signal test and analysis system.At last,by testing and analyzing typical analog random signal,this paper further describes analog-signal-random-testing-system's ability to test and estimate,and through experiment result,describes entropy steady test is a kind of effective and more strict random testing method.