A Random-sequence-generator Based On The Noise Signals Of The Computer Power

With the rapid development of computer network, information security is becoming more and more important. Cryptographic technology is applied in information system to ensure its security. Random Sequence is very important in cryptographic technology, just as the famous cryptographist Bruce Scheier said: within the six elements of Cryptographic Technology, the generation of Random Sequence is seldom discussed, but it is also important as others. This thesis discusses how to produce high quality, high speed and convenient Random Sequence Generators.This paper carries through main tasks as follows:1. Research and analyze on the random-sequence-generators which are used currently in computer security system, point out that the main problems of random-sequence-generators are poorer randomicity,slower speed and discommodiousness in use.2. Research on the noise signals of computer, including the external noises of wire-net and the internal noises of the computer, and discover that the noise signals is objective in existence, and which takes on good randomicity.3. Research and analyze on the theories of wavelet-transformation and wavelet-analysis.4. Based on analyzing the noise signals of the computers and researching on the function of wavelet analysis in extracting weaker signals, design a random-sequence-generator based on the noise signals of the computer power circuit, moreover, eliminate the windages and the pertinences of the output of the hardware-random-sequence-generator by bringing this output to bear some kind of Fourier transformation to enhance the quality of the random-sequence-generator and to meet the needs the cryptogram.