Method and system for inter-system secret key synchronization

Abstract

The invention provides a method and system for inter-system secret key synchronization. A first system database acquires a first secret key to be synchronized; the first secret key is decrypted to be first plain text through first encryption equipment; the first plain text is encrypted based on the symmetric encryption algorithm to obtain first cipher text; the first cipher text is written into synchronous data, and the synchronous data are transmitted to a second system database; the first cipher text in the synchronous data is acquired and then is decrypted to be the first plain text based on the symmetric encryption algorithm; the first plain text is encrypted through second encryption equipment to obtain a second secret key. According to the method and system, the secret key does not need to be modified manually, secret key synchronization between different encryption equipment systems is achieved, operation is convenient, and security is high.

Description

Technical field [0001] The present invention relates to the field of key synchronization, in particular to a method and system for key synchronization between systems. Background technique [0002] POS terminal keys are divided into two levels: key encryption key (KEY) and working key (WK). The key encryption key (KEY) is used to encrypt and protect the working key (WK). Each POS terminal shares a unique KEY with the POS processing center. KEK has security protection measures and can only be written to the POS terminal and participate in operations. Cannot be read. When the POS terminal obtains the working key from the POS processing center, it encrypts and decrypts it through the shared KEY, and the working key is an important basis for the POS processing center to verify whether the POS terminal is a legitimate terminal. At present, KEY is generated by the IABMS system (merchant, terminal information management system) through a random algorithm, and synchronized to the POS p...

AI Technical Summary

Problems solved by technology

[0004] The existing method needs to manually change the key on the POS terminal, which takes a long period of time to manually modify the key on the terminal, and it is unrealistic for the administrator to go to the merchant to manually modify the key on the terminal one by one

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