Information sharing realizing method for CPU card with multi-application COS

Abstract

The invention provides an information sharing realizing method for a CPU card with a multi-application COS. The information sharing realizing method includes the following steps: a first elementary file is established in a master directory of the CPU card, and is used for storing data for the access of the COS; a plurality of application directories which are corresponding to the multiple application of the multi-application COS are established in the master directory of the CPU card, and second elementary files are respectively established in the application directories, wherein the second elementary files point at the elementary files in the previous stages of directories so as to quote the elementary files. When executing certain application, the COS can realize synchronization with data of other applications under the condition of not accessing the elementary files in other application directories, thereby realizing information sharing under the premise of ensuring data completeness and safe transaction.

Description

technical field [0001] The invention relates to an information sharing method, in particular to an IC card information sharing method. Background technique [0002] With the development of information technology, the application fields of IC cards continue to expand, and the market holdings of IC cards continue to increase, especially in the fields of telecommunication cards, social security cards, public transportation cards, campus cards, and Internet bar cards. The number of cards and systems is impressive and continues to expand. [0003] IC cards are divided into memory cards and CPU cards. As the various requirements for IC cards are getting higher and higher, and the various management tasks required by the card itself are becoming more and more complicated. Therefore, the CPU card with a microprocessor inside has high security, strong functions, and reliable data. The advantages of high reliability will be applied more and more after the cost is gradually reduced. ...

AI Technical Summary

Problems solved by technology

But at the same time, different applications cannot share information, unless one application can read and modify files in other application directories, but this operation will affect the security protection of information, especially the integrity of transactions cannot be guaranteed in cross-application transactions, resulting in the entire Data security cannot be guaranteed and transaction data is abnormal, and at the same time violates the basic security requirements in the PBOC standard

[0008] However, with the popularization and application of one card with multiple functions, the original multi-application card mainly solves the simple combination of multi-card functions, which can no longer meet the needs of applications, such as the need to realize wallet sharing under multiple applications, record file sharing, etc.

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