this post was submitted on 28 Feb 2024
150 points (98.1% liked)
Linux Gaming
15810 readers
49 users here now
Gaming on the GNU/Linux operating system.
Recommended news sources:
Related chat:
Related Communities:
Please be nice to other members. Anyone not being nice will be banned. Keep it fun, respectful and just be awesome to each other.
founded 4 years ago
MODERATORS
you are viewing a single comment's thread
view the rest of the comments
view the rest of the comments
The big reason for HDMI's non-freeness is the use of on-protocol encryption. They learned from DeCSS, and the forum can't let it happen again.
I'm sure similar requirements stop DisplayPort and DVI from going open source.
Would you mind elaborating? Honestly interested
They're referencing HDCP
There's two I believe, HDCP which has been around since the DVI days and only now people bothered to implement, and another form of XOR-based on the actual cable itself done with a secret key, again, its DeCSS all over again but the HDMI Forum has never promoted the secret key.
XOR on the cable is completely fine for encryption, provided the input source sends the key to the chip on the cable. That really wouldn't be hard to implement, though it would certainly negate the intended purpose here (stopping copyright violations) since it wouldn't prevent recording boxes. However, it would provide encryption and prevent listeners on the wire from seeing the data in transit, which should be the point here.
Cables shouldn't be where copyright protection is enforced, that should be done at the point of sale. If you don't trust your customers, don't sell to them. As Gabe Newell said, piracy is a service problem, if you provide a good service at a good price, you don't need to enforce copyright protections since it's easier and less risky to just use your service.