Method and device for generating true random number

A technology of true random number and generating device, applied in the field of security encryption, can solve the problems of inferring the output number of the generator and the non-repeatable random number sequence of the algorithm, and achieve the effect of simplifying the hardware structure

CN102479067AInactive Publication Date: 2012-05-30上海宇芯科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2012-05-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a method and a device for generating a true random number. The device comprises a high frequency oscillator, an initial seed number generation unit, an error diffusion calculation unit, a linear feedback unit, a control unit and a random number output unit, wherein the output end of the high frequency oscillator is connected with the input end of the initial seed number generation unit; the output end of the initial seed number generation unit is connected with the input end of the error diffusion calculation unit; the output end of the error diffusion calculation unit is connected with the linear feedback unit; the output end of the linear feedback unit is connected with the control unit; and the control unit is connected with the random number output unit. The device achieves a metastable state circuit only by using general logic hardware, so the hardware structure is simplified; one-time-pad is realized by storing an initial seed number in a cache reset at each time; judgment and feedback control are realized by using a generator polynomial; and a secure hash algorithm is realized by using an error diffusion process, therefore, an effect that the random number is difficult to copy or forecast is achieved.
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