earticle

영어

Forensic Marking is the technology that enables the service providers (SP) to identify the illegal digital contents distributors by first inserting markings (data indicating the user information and playback time) in realtime into the digital contents at time of playback of digital contents, and then later by extracting inserted markings from the contents which are illegally captured from the
multimedia device such as IPTV STBs and distributed over the Internet. Digital Rights Management (DRM), which is a very popular content protection technology, has the security hole that can be vulnerable because the encrypted digital contents are transformed into
their original plaintext forms after the decrypting process on the STBs. Therefore Forensic Marking (FM) has now become a companion content protection solution to DRM.
This article describes a new way of tracking up to 4 illegal content users in FM implementation using the blue-difference chroma
component of YCbCr color space. This FM technology has many advantages like fast processing time and easy portability to STB
devices compared to that of the traditional watermarking processing in the frequency domain.