Method for encrypting and decrypting recorded program through HDCP key

An encryption and decryption, key pair technology, applied in the direction of analog security/charging system, pulse modulation TV signal transmission, electrical components, etc., can solve the problem of digital program operators' interests not being guaranteed, and achieve the effect of protecting interests

Active Publication Date: 2010-12-29
KONKA GROUP
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Problems solved by technology

This practice does not protect the interests of digital program operators

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  • Method for encrypting and decrypting recorded program through HDCP key
  • Method for encrypting and decrypting recorded program through HDCP key
  • Method for encrypting and decrypting recorded program through HDCP key

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Embodiment Construction

[0015] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0016] In recent years, a high-bandwidth digital content protection technology HDCP (High-bandwidth Digital Content Protection) has emerged. The emergence of HDCP ensures that high-definition signals transmitted by HDMI (High-Definition Multimedia Interface) or DVI (Digital Visual Interface) will not be illegally recorded. The HDCP technical specification is completed by Intel Corporation. When users make illegal copies, this technology will interfere and reduce the quality of the copied images, so as to protect the content. The principle of HDCP is to store an available key set at both the sending end and the receiving end. The value KSV of the sending end and the cryptographic processing unit of the receiving end check each other's KSV value to ...

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Abstract

The invention discloses a method for encrypting and decrypting a recorded digital television program through a high-bandwidth digital content protection (HDCP) key. In the method, encrypting and decrypting operation is performed on the recorded content by using the HDCP key carried by a high-definition multimedia interface (HDMI); and an equipment serial number, namely a key selection vector (KSV) is added during the encrypting and decrypting operation. Due to the uniqueness of the KSV carried by a television set or a set-top box, the recorded content is encrypted and decrypted, so that the digital program recorded through the digital television set or the digital set-top box can only be played on the digital television set or the digital set-top box per se.

Description

technical field [0001] The invention relates to the broadcasting of digital TV programs, in particular to a method for encrypting and decrypting recorded digital TV programs through HDCP keys. Background technique [0002] With the development of digital TV, TV operators have launched a series of paid TV programs, and users must go through relevant payment procedures before they have the right to watch. Currently, most digital TV programs are recorded without encryption restrictions, and digital TV programs recorded on a TV or set-top box can be played on the same series of products. Therefore, a program recorded by a paying user can be provided to other users who have not paid the fee to watch, without being restricted by the TV operator. This practice makes the interests of digital program operators not guaranteed. Contents of the invention [0003] The purpose of the present invention is to provide a method for encrypting and decrypting recorded digital TV programs th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/16H04N7/24H04L29/06
Inventor 谭日照苏鹏飞
Owner KONKA GROUP
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