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On 24 February 2001, Dalit Naor, Moni Naor and Jeff Lotspiech published a paper entitled "Revocation and Tracing Schemes for Stateless Receivers", where they described a broadcast encryption scheme using a construct called Naor-Naor-Lotspiech subset-difference trees. That paper laid the theoretical foundations of AACS.<ref>{{cite web|url=http://www.playfuls.com/news_05648_HD_DVDs_AACS_Protection_Bypassed_In_Only_8_Days.html |title=HD DVD's AACS Protection Bypassed. In Only 8 Days?! |access-date=25 October 2007 |author=Dan Nicolae Alexa |date=28 December 2006 |work=playfuls.com |url-status=dead |archive-url=https://web.archive.org/web/20080210005229/http://www.playfuls.com/news_05648_HD_DVDs_AACS_Protection_Bypassed_In_Only_8_Days.html |archive-date=10 February 2008 }}</ref>
The AACS LA consortium was founded in 2004.<ref>{{cite
|url = http://www.spectrum.ieee.org/jan05/2703
|title = Loser: DVD Copy Protection, Take 2
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|url-status = dead
}}</ref>
The final AACS standard was delayed,<ref>{{cite web|url=http://www.pcworld.com/article/id,123924-page,1/article.html |title=Toshiba Hints at HD-DVD Delay |access-date=19 October 2007 |author=Martyn Williams |date=14 December 2005 |work=pcworld.com |archive-url=https://web.archive.org/web/20071005171717/http://www.pcworld.com/article/id%2C123924-page%2C1/article.html |archive-date=5 October 2007 |url-status=live }}</ref> and then delayed again when an important member of the Blu-ray group voiced concerns.<ref>{{cite web |url=http://www.heise.de/english/newsticker/news/69559 |title=AACS copy protection for Blu-ray disc and HD DVD delayed again |access-date=19 October 2007 |author =Craig Morris |date=14 February 2006 |work=heise.de | archive-url= https://web.archive.org/web/20071102222432/http://www.heise.de/english/newsticker/news/69559| archive-date= 2 November 2007 | url-status= live}}</ref> At the request of Toshiba, an interim standard was published which did not include some features, like managed copy.<ref name=pcworld-burning-questions /> On July 5, 2009 the license of AACS1 went online.<ref>{{Cite web |last=Calonge |first=Juan |date=8 June 2009 |title=AACS Final License Goes Online |url=https://www.blu-ray.com/news/?id=2849
==Unlicensed decryption==
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|title=AACS licensor complains of posted key
|access-date=2 May 2007}}</ref>
Some sites that rely on user-submitted content, like [[Digg]] and Wikipedia, tried to remove any mentions of the key.<ref>{{cite
|url=http://blog.wired.com/business/2007/05/wikipedia_locks.html
|title=Wikipedia Locks Out "The Number"
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|access-date=2 May 2007
|date=1 May 2007
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|title=Digg's DRM Revolt
|first=Andy
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