Method and system for on-line distributing authentication information

Abstract

The invention discloses a method used for online issuing authentication information; the method is used for issuing the authorization information to a condition accepting (CA) mobile terminal; the CA mobile terminal comprises a mobile terminal and a card which are connected with each other by an interface; the method comprises the steps as follows: firstly, the CA system signs the authorization information, gains the signature information of the authorization information, and issues the signature information and the authentication information to the mobile terminal; subsequently, the mobile terminal sends the signature information and the authentication information to the card; finally, the card verifies the signature information; if the verification is successful, the authentication information is memorized in the safety area of the card, thus ensuring the safety of the authentication information. The invention also discloses a system used for online issuing of the authorization information corresponding to the method. The method and the system can ensure the safety of the authorization, information, reduce the operation charges of the terminal side and the cost of the mobile terminal.

Description

technical field [0001] The invention relates to mobile multimedia broadcasting technology, in particular to a method and system for sending authorization information online. Background technique [0002] In the mobile multimedia broadcasting system, multimedia programs are delivered to mobile terminals in the form of broadcasting. For billable multimedia programs, in order to protect the interests of service providers, the mobile terminal is required to have the conditional access function, that is, the billable multimedia program data is transmitted after being scrambled by the CA system, and the mobile terminal must first successfully descramble the multimedia program data. to watch normally. [0003] Specifically, the process of realizing conditional access is as follows: multi-channel scrambled multimedia program data and corresponding conditional access information are multiplexed into the channel for transmission, and after the mobile terminal receives the data, the d...

AI Technical Summary

Problems solved by technology

On the one hand, the computing resources on the terminal side are very limited, and the decryption of authorization information usually requires a large number of calculations, resulting in a large calculation load on the terminal side; on the other hand, although the authorization information is encrypted, there is still the possibility of ciphertext The risk of being decrypted, thereby authorizing the information to be tampered with

For example, mobile terminals may not be developed according to the prescribed process

[0019] In addition, because the mobile terminal must be able to provide a trusted operating environment, the cost of the mobile terminal is high; otherwise, if the mobile terminal cannot provide a feasible operating environment, the authorization information is easily cracked

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