Digital-watermark-based digital copyright management method and device for IPTV terminals

Abstract

The invention discloses a digital-watermark-based digital copyright management method and a device for IPTV (Internet Protocol Television) terminals, wherein the method comprises the steps as follows: embedding a user identity watermark in a digital video content when a first IPTV terminal obtains the digital video content from a server, thereby obtaining and storing the video content with the user identity watermark; obtaining a security communication key TCK (Technology Compatibility Kit) through key agreement, and establishing a communication protection channel between the first IPTV terminal and a second IPTV terminal; adopting the security communication key TCK to encrypt the video content with the user identity watermark at the first IPTV terminal according to the request of the second IPTV terminal, and sending the encrypted video content to the second IPTV terminal through the communication protection channel; and decoding the video content received by the second IPTV terminal according to the secure communication key TCK, thereby obtaining the video content with the user identity watermark.

Description

technical field [0001] The present invention relates to the field of digital rights management, in particular to a digital watermark-based IPTV terminal digital rights management method and device. Background technique [0002] Digital Rights Management (DRM, Digital Rights Management) is a series of software and hardware technologies to realize the copyright protection of digital video content. Its main purpose is to protect digital video content, so that buyers of digital video content can use it within the agreed scope of authorization. [0003] At present, the digital copyright management method of the IPTV system is implemented by adopting cryptographic technology, which protects the security of transmission and distribution of digital video content. For the IPTV system under the protection of digital rights management, most of the recorded or downloaded digital video content is stored in the IPTV terminal in the form of ciphertext, and the plaintext of the digital vid...

AI Technical Summary

Problems solved by technology

Since the video content is stored in the form of ciphertext, when the IPTV terminal uses the same encrypted video content multiple times, it needs to decrypt it multiple times, which increases the cost of decryption and greatly affects the experience of playing video content on the IPTV terminal.

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