Method for implementing reading and writing of IC card, IC card, card reader and system

Abstract

The invention discloses a method for implementing reading and writing of an IC card, which comprises the following steps: judging whether a maximum storage limit value and a target storage limit value are set in the standard of the IC card or not before carrying out appreciation or depreciation operation on the IC card, and leading an offline card reader to only carry out one-way depreciation command operation on the maximum storage limit value in the IC card when implementing a depreciation operation command on the IC card if the maximum storage limit value and the target storage limit valueexist, or leading the online card reader to only carry out one-way depreciation command operation on the target storage limit value in the IC card when implementing an appreciation operation command on the IC card. The invention further discloses the corresponding card reader, the IC card and a system, the adoption of the scheme provided by the invention can realize online appreciation by only adjusting the exiting storage way of key data of the IC card and increasing a small amount of storage content and simultaneously transforming the appreciation card reader to the online card reader; and other devices and the system only need to carry out software updating, thereby reducing the transformation cost and the time.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a method for realizing reading and writing of an IC card, an IC card, a card reader and a system. Background technique [0002] With the development of communication technology and the broadening of its application fields, the application of integrated circuit (Integrate Circuit, IC) cards has become more and more extensive. The security of the stored-value card system of the card has encountered very serious challenges, mainly including: 1. Although using a Security Module Group (Security Authentication Module, SAM) card to authenticate the card number authentication code can prevent the illegal cloning of the IC card, it cannot To prevent illegal value-added by tampering with key information areas such as stored value after cracking the existing IC card key, the use of one card and one encryption can only slightly delay the cracking speed. 2. Because the cost of the tool u...

AI Technical Summary

Problems solved by technology

3. Since offline card readers are usually used, the background system cannot perform real-time inspections to detect abnormal IC cards in time

4. Due to the limitation of the update frequency of the blacklist, the blacklist cannot be downloaded to the offline card reader in time, and the abnormal IC card cannot be locked in time, resulting in losses

Since all IC cards need to be replaced, the retrofit costs involved are huge

[0004] In the process of realizing the present invention, the inventor found that the existing main anti-cracking methods have great disadvantages, including large amount of engineering, long time required, and high cost of modification or update

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