Safe system realizing one machine with multiple ciphers on POS machine and method thereof

Abstract

The invention relates to a safe system realizing one machine with multiple ciphers on POS machine and a method thereof. The system comprises a hardware encrypting machine, a TEK distribution module, aPOS terminal device, a TMK distribution module and a POS background system, wherein, the hardware encrypting machine is connected with a secret key POS terminal by the TEK distribution module, the hardware encrypting machine is connected with the secret key POS terminal by the TMK distribution module, the secret key POS terminal is connected with a POS terminal cipher keyboard, and the hardware encrypting machine is connected with the POS terminal cipher keyboard by the POS background system. The method is based on a 3DES symmetric secret key system, safely produces, distributes and uses themethod of the main secret key TMK of the POS terminal to realize the function of one machine with multiple ciphers on the POS terminal.

Description

technical field [0001] The invention belongs to the technical field of electronic communication, and in particular relates to a security system and method for realizing multiple secrets in one machine on a POS machine. Background technique [0002] At present, the key management function of the POS terminal used for the cardholder's card consumption function is relatively weak. Multiple POS machines share the same key (multiple machines, one secret), and a city shares the same key (one city, one secret) or One region shares the same key (one secret for one region), which has many security risks in key management, and the leakage of one POS machine will affect the key information management security of other POS. This proposal is based on a symmetric key system, and a set of encryption methods is designed, so that one POS machine can support multiple keys at the same time, and each POS key is different, and the leakage of one POS will not affect other POS security, and the s...

AI Technical Summary

Problems solved by technology

[0012] At present, the POS machines deployed in the market, for the convenience of key infusion, mostly adopt the method of multi-machine one secret, that is, multiple terminals share the same terminal master key or one region one secret, and issue the terminal master key To the POS terminal, the advantage of doing this is that the master key is issued conveniently and quickly, but the biggest problem is that once the terminal master key is leaked, other terminals in a region that share the same master key will also be leaked, which will pose a serious safety hazard

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