Smart card and method for accessing objects in smart card

Abstract

This invention discloses one intelligent card memory subject method by use of capacity device in subject type, which comprises the following steps: testing order parameters and judging its legality and analyzing its detail operation type; analyzing input subject label and judging whether the current application entrance label is same; if yes, then indexing the current entrance; if there is the subject, fulfilling the memory operation flow according to the subject property; due to APDU subject this invention is for each detail application flow.

Description

Technical field [0001] The invention relates to the field of data storage and information processing, in particular to a smart card and a method for accessing objects in the smart card. Background technique [0002] Due to the disadvantages of existing magnetic stripe cards such as poor security, banks at home and abroad are gradually adopting smart cards (CPU cards) instead of magnetic stripe cards, and have issued a large number of smart cards individually or in conjunction with industry users. Generally speaking, a smart card is a plastic card that contains an embedded integrated circuit (IC). The integrated circuit contains a miniature central processing unit (CPU), ROM, RAM and other auxiliary peripheral circuits. The integrated circuit has similar capabilities as a computer. , Such as: running programs, processing input and output data. When using the above CPU card, external power supply and other interface devices are required. [0003] In order to regulate the migration ...

AI Technical Summary

Problems solved by technology

[0009] 1. When the CPU card creates a file, it must first declare the type of the file to be created and the size of the file to be created; and, after confirmation, the length of the file is fixed and cannot be changed, so that the previously applied space cannot be used again

[0010] 2. After the CPU card creates a file, it cannot be deleted

[0011] 3. There are only a few types of CPU card files, that is, the file types are fixed

[0012] 4. The CPU card must create and write files by sending messages to the smart card, and the number of bytes written each time generally cannot exceed 256 bytes, and the processing process is complicated

As a result, the application development of smart cards is limited to a relatively small circle, and it is difficult to realize and promote the multi-application of smart cards.

[0025] Because the existing technology cannot formulate a set of instructions or processes that can meet the application of CPU cards in various industries, the development cost is extremely high, and subsequent upgrades or business integration are difficult to achieve

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