Authorizing and descrambling method and apparatus in CAS of mobile multimedia broadcast

A mobile multimedia and drive module technology, applied in the field of information security, can solve problems such as inconvenient terminal software upgrades and rising terminal production costs, and achieve the effects of lower threshold and development costs, high security, and expanded industrial scale

Active Publication Date: 2008-10-22
武汉国广天喻信息技术有限公司
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AI Technical Summary

Problems solved by technology

[0021] Due to the strong correlation between the descrambling operation and the decryption authorization module, the small card method will also lead to the problem of integrating multiple CA playback software in the terminal. Compared with the patch method, it will also cause the terminal production cost to increase, and the later CA replacement will cause Problems such as inconvenient terminal software upgrade

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  • Authorizing and descrambling method and apparatus in CAS of mobile multimedia broadcast
  • Authorizing and descrambling method and apparatus in CAS of mobile multimedia broadcast
  • Authorizing and descrambling method and apparatus in CAS of mobile multimedia broadcast

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Embodiment Construction

[0035] Referring to the accompanying drawings, specific embodiments of the present invention will be described in detail below.

[0036] SD / TF smart card refers to smart cards in two forms: TF and SD. figure 2 with image 3 are shown in respectively. The technical solution of the invention is to apply the SD / TF smart card to the authorization and descrambling method, and the operating system of the SD / TF smart card adopts the Java Card system. This smart card has an SD / TF interface form, which is compatible with the SD / TF standard interface of the existing terminal, that is, it conforms to the existing SD / TF interface standard form, and the terminal passes the MMC (Multi Media Card, Multimedia Card) protocol or SDIO (Serial Digital Input) / Output, continuous digital input / output) protocol to communicate with this device. The operating system of the smart card adopts the Java Card system, and multiple CA solutions can be integrated in the card, so as to realize multiple enc...

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Abstract

The invention discloses an authorizing-descrambling method used in digital multimedia broadcasting CAS. An SD / TF smart card is applied to the authorizing-descrambling method, and an operating system of the SD / TF smart card adopts Java Card platform technology. The method separates machines from cards, and has low cost as well as high safety. The invention also provides a device for realizing the method. The device comprises a terminal and the SD / TF smart card, wherein the terminal comprises a universal interface driver module; the SD / TF smart card comprises a distribution module, a filter module, an encryption-decryption-authorization control module and a descrambling module; a data stream orderly passes the universal interface driver module, the distribution module, the filter module, the encryption-decryption-authorization control module and the descrambling module; a descrambled data stream orderly passes the distribution module and the universal interface driver module and then returns to the terminal.

Description

technical field [0001] The present invention relates to the information security technology in the CAS (Conditional Access System, Conditional Access System) of mobile multimedia broadcasting, more specifically, relates to the method of authorization and descrambling to be used when realizing conditional access, and the method to be used to realize this method to the device. Background technique [0002] With the popularity of Internet technology and the introduction of high-bandwidth wireless technologies such as 3G / 4G, various mobile multimedia information services can be realized on mobile terminals. Among these mobile information services, the most promising high-speed wireless application is mobile phones. TV service. [0003] Mobile TV service is the product of the integration of mobile communication and TV media industries. Therefore, mobile phones are known as the "fourth screen" after movies, TVs and computers. Using the operating system and video functions of mob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/16H04N7/167
Inventor 王同洋吴俊军
Owner 武汉国广天喻信息技术有限公司
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