Method and system for safely downloading terminal master key

A terminal master key and master key technology, which is applied in the field of secure downloading of terminal master keys, can solve problems such as potential safety hazards and master key TMK leakage, and achieve the effect of improving download security

Active Publication Date: 2014-04-09
FUJIAN LANDI COMML EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Since the master key TMK is downloaded and transmitted to the POS terminal through the parent POS, it is transmitted in plain text, which has potential security risks. If it is intercepted midway, it will cause the leakage of the master key TMK

Method used

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  • Method and system for safely downloading terminal master key
  • Method and system for safely downloading terminal master key
  • Method and system for safely downloading terminal master key

Examples

Experimental program
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Embodiment approach

[0073] see image 3 , which is a method flowchart of a method for securely downloading a terminal master key according to another embodiment of the present invention, the method specifically includes steps:

[0074] S1. The key downloader generates or imports the public-private key pair private key Pr and public key Pu, and sends the public key Pu to the CA center. The CA center generates the acquirer root certificate AcquireRCRT and the corresponding private key AcquireRCRT_Prk, and sends the received key Key download public key Pu uses AcquireRCRT_Prk signature to generate acquirer work certificate AcquireWCRT;

[0075] The key downloader stores the work certificate AcquireWCRT and the private key AcquireWCRT_Prk;

[0076] The POS terminal stores the acquirer root certificate AcquireRCRT;

[0077] S2. The key downloader generates or imports the terminal master key TMK;

[0078] S3. The key downloader uses the private key Pr to encrypt the terminal master key TMK to generate...

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Abstract

The invention discloses a method for safely downloading a terminal master key. The method includes the steps that S1, a key downloader generates or imports a pair of keys which are a private key (Pu) and a public key (Pr); S2, the key downloader generates or imports the terminal master key (TMK); S3, the key downloader uses the Pr for encrypting the TMK to generate a master key ciphertext (Ctmk); S4, the key downloader transmits the Pu and the Ctmk to a POS terminal; S5, the POS terminal uses the Pu for decrypting the Ctmk to obtain the TMK, and the TMK is stored into a pin pad. The invention further discloses a system for safely downloading the TMK. The method and system have the advantages that the unsymmetrical keys encrypts the TMK and then perform downloading between the key downloader and the POS terminal, the TMK is transmitted in a ciphertext mode in the transmission process, only the POS terminal and the key downloader can decrypt the TMK to obtain a master key plaintext, and therefore safety of master key downloading is greatly improved.

Description

technical field [0001] The invention relates to the field of electronic payment, in particular to a method and system for securely downloading a terminal master key. Background technique [0002] Bank card (Bank Card) is becoming more and more popular as a payment tool. The usual bank card payment system includes point of sale terminal (Point Of Sale: POS), terminal management system (Terminal Management System: TMS), password keyboard (PIN PAD) and Hardware encryption machine (Hardware and SecurityModule: HSM). Wherein POS terminal can accept bank card information, has communication function, and accepts the instruction of teller and completes the equipment of financial transaction information and relevant information exchange; TMS system carries out centralized management to subordinate POS terminal, comprises parameter downloading, password The centralized management and transaction processing system that downloads the key, accepts, processes or forwards the transaction ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G07G1/00
CPCH04L9/08G06Q20/20G06Q20/3829H04L63/061H04L9/0825H04L9/083H04L9/321
Inventor 孟陆强姚承勇彭波涛苏文龙
Owner FUJIAN LANDI COMML EQUIP CO LTD
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