Communication-free hopping code generation method of access control system

Abstract

The invention discloses a communication-free hopping code generation method of an access control system. A hopping code generation system comprises a hopping code terminal and access controllers, one hopping code terminal corresponds to a plurality of access controllers, each access controller controls one access terminal or a plurality of access terminals, wherein a hopping code generating program is mounted in the hopping code terminal, the hopping code generating program is provided with a set of nonlinear algorithms for generating hopping codes and an encryption algorithm calling rule list corresponding to the access controllers, and the algorithms of each access controller at different time intervals are different. A decryption program of the access controllers is provided with a decryption algorithm calling rule list corresponding to the hopping code terminal and a set of decryption nonlinear algorithms, wherein an algorithm at each time interval is the same as the algorithm of the hopping code terminal. According to the communication-free hopping code generation method of the access control system, a corresponding access control terminal is authorized according to a comparison result, no communication link is arranged between the hopping code terminal and the access controllers, and thus non-repeating codes in different time of the access controllers are achieved.

Description

technical field

[0001] The invention relates to a method for generating a code for an access control system, in particular to a method for generating a hopping code for an access control system without communication. Background technique

[0002] Code hopping technology, also known as rolling code technology, is an encryption technology that uses complex nonlinear encryption algorithms to realize encoding. It is characterized by multiple changes in encoding, anti-interception, safety and reliability, and strong ability to prevent attacks and illegal intrusions. At present, the code-hopping technology is mainly used in the remote control keyless entry control system of the automobile industry, and the code-hopping technology is used to open and close the car door by transmitting wireless signals. The code hopping technology uses hardware technology to make the password sent by the key unique and random each time. The intruder cannot predict it. Even if the original unlock pas...

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