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Dynamic password circuit, access control system and access control method

A technology of dynamic password and password circuit, which is applied in the field of dynamic password circuit, access control system and access control, can solve the problems of password leakage and poor security, and achieve the effect of solving poor security and avoiding password leakage

Inactive Publication Date: 2020-08-14
SOUTH CHINA NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The application provides a dynamic password circuit, an access control system and an access control method, which are used to solve the technical problem that the existing password-controlled access control system is prone to poor security due to password leakage

Method used

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  • Dynamic password circuit, access control system and access control method
  • Dynamic password circuit, access control system and access control method
  • Dynamic password circuit, access control system and access control method

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Embodiment Construction

[0045] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0046] For ease of understanding, see figure 1 , the application provides an embodiment of a dynamic password circuit, including: a first phase-locked loop circuit, a second phase-locked loop circuit and six groups of password circuits;

[0047] The first phase-locked loop circuit is used to generate clock signals of three different frequencies, which are respecti...

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Abstract

The application discloses a dynamic password circuit, an access control system and an access control method. The dynamic password circuit comprises a first phase-locked loop circuit, a second phase-locked loop circuit and six groups of password circuits. The first phase-locked loop circuit is used for generating three clock signals with different frequencies to respectively drive the first three groups of password circuits to generate first three-bit passwords; the second phase-locked loop circuit is used for generating other three clock signals with different frequencies to respectively drivethe rear three groups of password circuits to generate rear three-bit passwords; and each group of password circuits is composed of a four-bit linear feedback shift register for generating random numbers of unit number. According to the dynamic password circuit provided by the application, six clock signals with different frequencies are generated through the two phase-locked loop circuits to drive the six groups of password circuits and randomly generate six-bit dynamic passwords, so that a technical problem that the existing password-controlled access control system is poorer in safety dueto password leakage is solved.

Description

technical field [0001] The present application relates to the technical field of password control, in particular to a dynamic password circuit, an access control system and an access control method. Background technique [0002] Existing access control systems that adopt password control identify whether there is access authority by verifying whether the input password is correct. If the password entered by the user on the password input device of the access control system is correct, the access control system unlocks the user and allows the user to pass. , if the password entered is incorrect, the access control system will not unlock. However, the unlocking control method of the access control system of this fixed password verification is easy to leak the password and has poor security. Therefore, it is necessary to improve the existing password-controlled access control system to improve the security and reliability of the access control system. Contents of the inventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07C9/33
CPCG07C9/33
Inventor 杨会平曾碧卿丁美荣
Owner SOUTH CHINA NORMAL UNIVERSITY
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