A dynamic password circuit, access control system and access control method

A technology of dynamic password and password circuit, applied in the field of access control system and access control, dynamic password circuit, can solve the problems of password leakage and poor security, and achieve the effect of avoiding password leakage.
CN111540102BInactive Publication Date: 2022-01-04SOUTH CHINA NORMAL UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTH CHINA NORMAL UNIVERSITY
Publication Date
2022-01-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The application discloses a dynamic password circuit, access control system and access control method, including: 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 to generate three different Frequency clock signals are used to drive the first three sets of cipher circuits to generate the first three ciphers; the second phase-locked loop circuit is used to generate other three clock signals with different frequencies, which are respectively used to drive the last three sets of cipher circuits to generate the last three ciphers. Bit cipher; each set of cipher circuits consists of a four-bit linear feedback shift register that generates single-digit random numbers. The dynamic password circuit provided by this application generates six clock signals of different frequencies through two phase-locked loop circuits, drives six groups of password circuits, and randomly generates six-digit dynamic passwords, which solves the problem of the existing access control system controlled by passwords. A technical issue where password leaks lead to poor security occurs.
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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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