Data share method of smart card and the smart card

Abstract

The embodiment of the technical field relates to a smart card, and especially relates to a data share method of the smart card and the smart card. The method comprises the steps of receiving an access request of a first application for a share data area of the smart card, wherein an access key of the first application is carried in the access request, and key information of various applications and authority information corresponding to the various applications are preset in the smart card; verifying the access key of the first application according to the preset key information of the various applications; and operating the share data area according to the authority corresponding to the first application if the verification is successful. It is observed that the various applications may have own keys; the key of each application is not limited by the other applications, namely each application can access the share data by employing own key; therefore, different applications have different access authorities to the data share area; and the security of the share data can be improved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of smart cards, and in particular, to a data sharing method for a smart card and the smart card. Background technique [0002] At present, smart card technology is becoming more and more mature, and various applications can be carried on smart cards, such as transportation applications, financial applications, social security applications, and medical applications. By popularizing smart cards carrying various applications, the lives of users can be greatly facilitated. [0003] With the increase of applications carried by smart cards, multiple applications on smart cards need to share data. At present, data sharing by multiple applications on smart cards generally adopts the following two methods: [0004] Method 1: Extend the application. The extended application adopts the method of attaching one application to another application, that is, creating shared data and keys in the ma...

AI Technical Summary

Problems solved by technology

[0006] For the above method 1, the key maintainer is in the main application, but it cannot be maintained at will. For example, other application parties need to be notified when the key changes

[0007] For the above method 2, because the key is shared, the main application and other applications that obtain the key enjoy the same authority to operate data, and the authority cannot be subdivided

[0008] Therefore, the above two methods cannot subdivide the permissions of the application keys, thus affecting the security of shared data

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