Public key code hopping safety system and method

Abstract

A public key code hopping safety system and method mainly includes electronic unlocking key transmitting end and receiving end. It features transmitting end received touch-tone signal controlling program to execute ciphering transmit operation, reading out product serial number, encryption key, synchronous counter value, and irreducible polynomial Fm value from memory, then loading these data into ciphering unit, after complete ciphering and loading to shift register to transmit, after receiving end received signal, controlling procedure reading in serial number, deciphering encryption key, irreducible polynomial, synchronizing enumeration data from memory, to make deciphering and verifying, writing back new synchronizing count value to memory, in executing training pattern, writing back new serial number and deciphering encryption key to memory, when serial number is effective but deciphering invalidation, effectively deciphering outputting alarm signal, successfully learning, writing in new serial number, synchronous counter value, and deciphering encryption key for refreshing memory. Said invention has advantage of high system safety and low cost.

Description

Technical field: [0001] The invention relates to a public key code-hopping security system and method, in particular to an encrypted code-hopping security system and method of an electronic key and door lock system controlled by a microprocessor. Background technique: [0002] Door locks are often used in daily life. With the development of electronic technology, electronic keys and electronic door lock systems are widely used. People use electronic keys to send some specific wireless signals. After receiving the information, the door lock system , Automatically perform a series of corresponding operations, such as opening the door, unlocking the lock, turning on the light, preheating the internal air conditioner, and so on. However, most of the remote control door locks that are put into the market such as automobile door lock systems are based on fixed coding technology. The codes issued by the electronic key each time are fixed values. ) and other devices can easily crac...

AI Technical Summary

Problems solved by technology

Later, the rolling code was invented. The code issued by the electronic key is different each time, and it is fixed in some code words, which improves the security. Later, the code hopping of the block cipher encryption algorithm ( hopping code) security system, but with the development of technology, the technology and equipment of crackers are getting more and more advanced, the security of the block cipher code hopping system still cannot ensure the security of the system

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