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Smart card and method for operating data in smart card memory

A smart card and memory technology, applied in the field of smart cards, can solve the problems of unable to detect whether the logical calculation result is correct, the card can not find the wrong result, etc., to achieve the effect of improving security

Inactive Publication Date: 2013-04-24
BEIJING WATCH DATA SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the card cannot detect whether the logical calculation result is correct, the card cannot detect the result error

Method used

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  • Smart card and method for operating data in smart card memory
  • Smart card and method for operating data in smart card memory
  • Smart card and method for operating data in smart card memory

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Embodiment Construction

[0059] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0060] One of the core ideas of the embodiments of the present invention is that, for the data participating in the memory operation, especially the key data participating in the memory operation, after a certain data group in the data participates in the operation, other data groups in the data that do not participate in the operation are processed. Checking, if an abnormality is detected, provide error information, terminate the transaction or perform error correction, so as to prevent the jump of other data packets when the card is operating a certain data packet in the data, and improve the security of smart card applications.

[0061] refer tofigure 1 , which shows a flow chart of Embodiment 1 of a method for calculating data ...

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Abstract

The invention provides a method for operating data in a smart card memory, comprising the following steps of: configuring data packets, wherein the data participates in the memory operation, and the data packets comprise information bits and check bits; acquiring check bits corresponding to information bits in other data packets which do not participate in the operation before the existing data packets participate in the operation; and after the existing data packets finish the operation, checking weather tripping of the other data packets occurs in accordance with the information bits and the check bits. The method provided by the invention can be used to provide trip-proof protection for the data in the smart card memory, thus improving safety of the smart card in use.

Description

technical field [0001] The invention relates to the technical field of smart cards, in particular to a method for calculating data in a smart card memory and a smart card. Background technique [0002] Smart card is also called IC card, and its English name is SMART card or Integrated Circuit Card. The smart card integrates a microprocessor CPU, a storage unit (including random access memory RAM, program memory ROM (FLASH), user data memory EEPROM, etc.) and a chip operating system COS (chipoperating system), forming a complete computer system. In recent years, smart cards have been widely used in telecommunications, transportation, finance and other fields. [0003] When the smart card processes external commands, it will first put the data stored by itself and the data received from the outside into the memory. However, in some cases, the memory will jump, so that the data in the memory will also change. At this time, if the data stored in the memory is key data, such as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/08G06K19/07
Inventor 李必涛
Owner BEIJING WATCH DATA SYST