HDCP Cracked - Is HD Content doomed due to lack of DRM now?

[Josh]

SOURCE

If this proves to be true it looks like all content protected with HDCP (TV's, BRD Players, PS3, XBOX 360, etc) might have their DRM system rendered useless.

Thoughts? Do you think this is real?

[f0dder]

Might be real, and is definitely interesting.

It's not as if HDCP has stopped piracy of HD material, pirates attack the source instead of the signal... which means, as usual, it's just the end-users that end up getting shafted. Hopefully this will mean the death of HDCP, and (even more) hopefully (and unlikely) there's so much interest vested that we won't see a successor.

[Renegade]

No reason to doubt it or believe it at the moment... Need to see a POC first.

Found this:

http://www.mdl4.com/2010/09/hdcp-master-key-2/

HDCP Master Key Released: DRM takes another hit
Posted on September 14, 2010 by mdl4

High-bandwidth Digital Content Protection (HDCP) was the entertainment industry’s solution to the protection of high quality digital content as it traveled from its storage medium to a display device. The standard can be boiled down to three key elements:

  1. Authenticating hardware
  2. Encrypting content as it passes between devices
  3. Key revocation to disable compromised (tampered) or cloned devices

High-bandwidth Digital Content Protection Diagram

High-bandwidth Digital Content Protection Diagram

Several years ago, Princeton University professor Ed Felten summarized the theoretical feasibility of cracking HDCP in a blog entry titled “Making and Breaking HDCP Handshakes.” The assertions in his blog were based on a 2001 paper, “A Cryptanalysis of the High-bandwidth Digital Content Protection System,” published by Crosby et al. that outlined how the HDCP handshake could be compromised.

Sure enough, HDCP seems to have been broken. The key may or may not have been derived from the keys of other devices as Felten and Crosby proposed. It may have been leaked by an Intel Affiliate. In addition to its cryptological flaws, like most DRM standards HDCP relies on trusted parties to guard the single master key, which is irrevocable and easily communicable.

The following text was taken from an anonymous pastebin posting. It provides the alleged master key and basic instructions for how to generate Key Selection Vectors (KSV) from the key, which can then be used in a source, sink or relay device.

The biggest implication of this release is that people will now be able to digitally capture high quality video signals coming from Blu-Ray players (in real time). If the MPAA moves ahead with its plan to release DRM protected discs of movies that are still in theaters, high quality rips of first-run theater movies may become available on file-sharing networks like BitTorrent.

Via pastebin:

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.  Add together those twenty rows of the matrix that correspond to the ones in the KSV (with the lowest bit in the KSV corresponding to the first row), taking all elements modulo two to the power of fifty-six; this is the source
private key.

To generate a sink key, do the same, but with the transposed matrix.

The HDCP Master Key:

Visit there for the links and more. Sounds like he knows what he's talking about.

[Josh]

This has been confirmed by Intel to be real:

Source

[Shades]

But it will not be of much consequence. Most DVD´s that come out still have very old type of protection on them. My guess is that this is done to have a legal `stick` with which they can drive you to court and beat you up there with it, so to speak.

Following that line of reasoning I don´t think this cracking of HDCP will have a major impact.

[4wd]

It must be real!