Worth noting (again, assuming this is credible): Version 2.0 of HDCP is likely not affected.

According to their FAQ: http://www.digital-cp.com/faqs "HDCP revision 2.0 uses industry-standard public-key RSA authentication and AES 128 encryption. It also supports protection of compressed content, making it feasible to use relatively slow 50 to 200 Mbps interfaces."

... and ...

"HDCP 1.x technology offers protection for uncompressed content transmitted over several common wired interfaces including DVI, HDMI and DisplayPort. HDCP revision 2.0 adds strengthened encryption..."