4 ms·
This has already been done before the master key leak, using ill-gotten keys. [1] What is shown here isn't that groundbreaking. HDFury uses either an ASIC or FP
by jevinskie 15y ago
This has already been done before the master key leak, using ill-gotten keys. [1] What is shown here isn't that groundbreaking. HDFury uses either an ASIC or FPGA so the HDL for HDCP crypto has already been done, just not openly. The stream cipher itself is quite simple. In HW it is very fast (just the PRNG generator + XOR) and in SW it is feasible but slow. [2] The really impressive work was done by whoever leaked the master keys - this project would have been impossible without their work. Intel's statement that any HW decrypter would be prohibitively expensive was just hot air to cover their asses. With the leaking of the master keys their precious DRM was immediately broken forever and they are just trying to save face.
[1]: http://www.hdfury.com/ http://www.hdfury.com/
[2]: http://www.cs.sunysb.edu/~rob/hdcp.html http://www.cs.sunysb.edu/~rob/hdcp.html
- wmf 15y agoIntel's statement that any HW decrypter would be prohibitively expensive was just hot air to cover their asses. Some people probably believed that hot air, so it's necessary to actually implement the crack to convince everyone. (The same thing happens in software where vendors ignore vulnerabilities until an exploit appears, then scramble to fix them.)
- CamperBob 15y agoPretty funny, all right. The moment Digilent announced the Atlys, it was obvious that it was tailor-made for a MIM attack against HDCP. I'm surprised it took somebody this long.
- nitrogen 15y agoHow did I not know about that board before? Ever since HD displaced SD, I've always wanted an FPGA platform to experiment with custom video processing a la tvtime and DScaler. Now I know what to save up for.