CPU and logical encrypt double-purpose smart card and key data processing method thereof

A technology for logically encrypting cards and key data, applied in the field of smart cards, can solve problems such as data out-of-sync, inconvenient use of cards, etc., and achieve the effect of convenient use

Active Publication Date: 2008-03-05
BEIJING WATCH DATA SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there will be a problem that the data stored in the two data storag...

Method used

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  • CPU and logical encrypt double-purpose smart card and key data processing method thereof
  • CPU and logical encrypt double-purpose smart card and key data processing method thereof

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Experimental program
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Embodiment Construction

[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0045] In order to solve the problem of data inconsistency caused by separate storage of the data of the CPU card system and the logic encryption card system in a smart card, as shown in Figure 1, the processing method of key data in the CPU and logic encryption dual-purpose smart card of the present invention Include the following steps:

[0046] CPU card system output / receive key data;

[0047] The CPU card system controls the read / write operation of key data in the logical encrypted data storage area.

[0048] In this way, since only the key data is stored in the logically encrypted data storage area, when the CPU card command received by the card involves key data, only the key data stored in the logically encrypted data storage area needs to be modified to realize data encryption. Consistency, which is convenient for users to use. When reading the key...

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Abstract

The method comprises: the CPU card system inputs and outputs the key data; the CPU card control the read/write of key data in the logically- encrypted data memory. The CPU and logically-encrypted dual-mode smart card comprises: a CPU card system and a logically -encrypted card system; a data control unit and a logically-encrypted data memory located in the logically-encrypted card system.

Description

technical field [0001] The invention relates to smart card technology, in particular to a CPU and logic encryption card and a method for processing key data. Background technique [0002] Integrated circuit card, also known as IC card, is packaged with an integrated circuit inside to store and process data. According to the different ways of reading and writing the EEPROM (Electrically Erasable Programmable Read-Only Memory) inside the IC card, the IC card can be divided into three categories: memory card, logical encryption card and CPU card. [0003] Among them, the memory card directly encapsulates the EEPROM chip on the card, and the external device can directly access any unit in the EEPROM. Since the memory card has only one EEPROM chip, the external interface of the IC card is actually the external interface of the EEPROM, so that the external read-write device can read and write the EEPROM very conveniently. As an IC card, it is impossible to judge the legitimacy o...

Claims

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Application Information

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IPC IPC(8): G06K19/077
Inventor 董敏臧宏伟席砺莼齐同心
Owner BEIJING WATCH DATA SYST
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