This key permits people to build hardware and software compatible with HDMI. It let's you decrypt the video traversing between HDMI-compliant equipment.
This is a forty times forty element matrix of fifty-six bit
hexadecimal numbers.
To generate a source key, take a forty-bit number that (in
binary) consists of twenty ones and twenty zeroes; this is
the source KSV.
Read more:
http://rudd-o.com/en/monopolies-of-the-mind/the-hdcp-master-key
