HDPC box - submitted for survey effect
posted by remintola on 29 December 2007 15:53
Problem context :
Would it be possible (someone in the great hacking community out there) could design / build a recorder appliance for a PC that had a hacked together HDMI / HDCP input, and sent an open MPEG stream to the PC... Would it be a patent / copyright infringement to publish the schematics and code for such a project on the internet?
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here is the legality of it
answered by wmcleod on 8 January 2008 16:36
On the surface this isn't explicitly "illegal" you can make an HDCP DRM stripper. Stripping DRM (digital rights management) isn't illegal. Later redistributing or exhibiting stripped media is. See the product Tunebite (or most audials products)
However, there is a caveat that Intel built in. Intel licenses the rights to make HDCP products and regulates what they can and can't do. Specifically they must: "effectively frustrate attempts to defeat the content protection requirements."
However, however, if the consumer buys another HDCP ready device and installs this "HDPC" box in between the signal source (Blu-ray player) and the receiver input (HD TV), it can "eavesdrop" on the data then route it to the PC where it is up to simple decryption (stream cypher) to make the signal usable. It would be difficult to decrypt in real time, but nothing being done is actually illegal yet.