Test circuit for testing random number generator

A technology of random number generator and test circuit, which is applied in the direction of random number generator, measuring electricity, measuring electrical variables, etc. It can solve the difficult problems of judging whether the random number generator is working normally, etc., and achieve the effect of stable function

Inactive Publication Date: 2018-04-24
天津国芯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Due to the random nature of the data generated by the random number generator, it is difficult to judge whether the random number generator is working properly through the g

Method used

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  • Test circuit for testing random number generator

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Embodiment Construction

[0022] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0023] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood ...

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Abstract

The invention provides a test circuit for testing a random number generator. The random number generator generates a first random number and stores it in a primary register, and then enables a test mode of a random number generator circuit; meanwhile, the random number generator further generates a group of random numbers and stores them in a secondary register, and then compares the random numberstored in the primary register with the random numbers stored in the secondary register; and an output signal of the random number generator circuit is regarded as an identification signal for judging whether operation of the random number generator is abnormal after the comparison is finished. The test circuit has the capability of continuous detection and is implemented in a hardware manner, sothat the test circuit has stable function and tamper-proof capability; and the test circuit can realize real-time testing of the random numbers generated by the random number generator, ensure that abnormal operation of the random number generator can be discovered in time when it occurs, and prevent the wrong random numbers from being used by the system.

Description

technical field [0001] The invention belongs to the field of integrated circuit function testing, in particular to a testing circuit for testing random number generators. Background technique [0002] A random number generator produces data with random properties (such as random numbers). Random number generators generally have two working modes: 1. Random number generator with non-determinism, that is, the random numbers generated by its sequence are irrelevant; 2. Random number generator with determinism, that is, its sequence The generated random numbers are correlated, but this correlation is usually very subtle in order to provide sufficient random properties, and this mode of operation is generally used for testing purposes. Due to the random nature of the data generated by the random number generator, it is difficult to judge whether the random number generator is working normally through the generated random data. Therefore, for most application scenarios, it can o...

Claims

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Application Information

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IPC IPC(8): G01R31/28G06F7/58
CPCG01R31/2851G06F7/588
Inventor 张楠肖佐楠郑茳
Owner 天津国芯科技有限公司
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