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Method for safely downloading cipher key of finance tax-controlling cashing machine

A cash register and financial tax technology, which is applied in the field of secure key download of financial tax control cash registers, and can solve the problems of easy cracking, error prone, and financial transaction security destruction of working key transaction passwords.

Inactive Publication Date: 2009-05-06
INSPUR QILU SOFTWARE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The key setting of the current financial tax-controlled cash register is generally set by manual input in plain text. If the sign-in and transaction information is intercepted, the working key and even the customer’s transaction password are very easy to be cracked, and the security of financial transactions is compromised. destroy
In addition, manually entering and setting the master key (16 digits) requires a lot of time and manpower for batch installation work, and is prone to errors

Method used

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  • Method for safely downloading cipher key of finance tax-controlling cashing machine
  • Method for safely downloading cipher key of finance tax-controlling cashing machine

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Embodiment Construction

[0012] The method of the present invention decrypts the ciphertext of the master key key with the private key of the PSAM card or the input key through a fixed algorithm, and directly downloads it into the password keyboard in a manner that the master key plaintext does not appear. Its implementation steps are as follows:

[0013] 1) Basic hardware and software functions of tooling, such as figure 1 Shown:

[0014] a. Have basic hardware functions, including CPU, AM, FLASH, SmatIC, LCD, keyboard, password keyboard interface;

[0015] b. Possess encryption and decryption operation functions, such as DES, AS algorithm on December 3, 2008 or other self-defined algorithms; encryption and decryption can also be realized through PSAM cards;

[0016] 2) Set up the process, such as figure 2 shown

[0017] a. Define an asymmetric encryption algorithm, use the public key of the algorithm to encrypt the merchant code of each merchant and the plaintext of the merchant's master key, g...

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Abstract

The invention provides a method for safely downloading a key of a financial tax control cash register. The method can be connected with a cipher keyboard of the financial tax control cash register, and stores ciphered master key cryptograph. A private key of a PSAM card or an input private key is used for decrypting master key cryptograph in a fixed arithmetic of facility and tooling, and the master key cryptograph is directly downloaded to a cipher keyboard in a mode of the disappearance of the master key cryptograph. The method of the invention can be used for setting the master key of financial tax control cash registers in batch. The method can be applied to set the master key of financial POS machines and various kinds of commercial POS.

Description

technical field [0001] The invention relates to a special method for managing and downloading the master key of a financial tax control cash register. Background technique [0002] The master key of the financial tax control cash register is generally stored in the password keyboard, which is used to decrypt the working key (PIN key and MAC key). The security of the key is directly related to the data security of financial transactions and the security of the cardholder's password on the financial tax control cash register, so the way to safely set the master key is very important. [0003] The key setting of the current financial tax-controlled cash register is generally set by manual input in plain text. If the sign-in and transaction information is intercepted, the working key and even the customer’s transaction password are very easy to be cracked, and the security of financial transactions is compromised. destroy. In addition, manually entering and setting the master ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07G1/00
Inventor 门松黄正茂蒋成军
Owner INSPUR QILU SOFTWARE IND
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