FITUG e.V. Förderverein Informationstechnik und Gesellschaft

Another Cryptography Paper suppressed by the DMCA

------- Forwarded message follows ------- Date sent: Wed, 15 Aug 2001 12:26:47 -0700 Send reply to: Law & Policy of Computer Communications <CYBERIA-L@LISTSERV.AOL.COM> From: "Jon O ." <jono@MICROSHAFT.ORG> Subject: Another Cryptography Paper suppressed by the DMCA To: CYBERIA-L@LISTSERV.AOL.COM

Here is Ferguson's actual response and position.

----- Forwarded message -----

To: dmca_discuss@lists.microshaft.org Subject: [DMCA_discuss] Cryptography Paper suppressed from the DMCA Date: Wed, 15 Aug 2001 10:13:44 -0700

Niels Ferguson has found a weakness in the HDCP content protection system. However, he can not publish the results due to DMCA issues.

He has written a paper regarding this issue here:

Censorship in action: why I don't publish my HDCP results http://www.macfergus.com/niels/dmca/index.html

<quote> HDCP is fatally flawed. My results show that an experienced IT person can recover the HDCP master key in about 2 weeks using four computers and 50 HDCP displays. Once you know the master key, you can decrypt any movie, impersonate any HDCP device, and even create new HDCP devices that will work with the 'official' ones. This is really, really bad news for a security system. If this master key is ever published, HDCP will provide no protection whatsoever. The flaws in HDCP are not hard to find. As I like to say: "I was just reading it and it broke." </quote>

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