4 ms·
In the case of HDCP, the master key wasn't found because of bad key security, but because of the design of the encryption algorithm. The keys are matrices, and
by keeperofdakeys 15y ago
In the case of HDCP, the master key wasn't found because of bad key security, but because of the design of the encryption algorithm. The keys are matrices, and given enough keys from devices that use HDCP, you can calculate the master key using matrix algebra.
- __david__ 15y agoInterestingly, the algorithm is apparently the same as the 1394 (FireWire) 5c "restricted authentication" encryption. I assume they have different seeds for their matrices but if you can crack one of them you can crack the other. If only anyone used 1394 any more (let alone 5c over 1394)...