Talk:Advanced Access Content System

message: I keep hearing from Linux and OSS folks that CSS is not needed to make a raw duplicate of a DVD disk, and therefore the industry claims that "DeCSS causes piracy" are fallacious.  Of course the argument omits the side-effect that being able to decrypt a video allows the video to be posted online in file sharing networks in decrypted form, thus greatly contributing to piracy.  My question is: is decryption necessary in AACS in order to make a sector-level copy of a disk?  If not, then this article is misleading; in particular, the section "Attempts at defeating AACS copy protection" should be renamed, as it would be trivially easy to copy a disk (given the right hardware), and decrypting is a different game altogether (i.e. AACS would have little to do with copying) - Connelly 23:32, 1 October 2006 (UTC)
thread_title:  Is it necessary to defeat the copy protection in order to copy the media? 

message: Is there any particular reason the industry choose a protection format which it appears everyone who understand about content protection seem to think one of the worst formats chosen? Was it price/royalties? Simplicity? They don't really care about protection?
Or is it not that AACS was one of the worst possible content protection systems but that the content protection idea itself is extremely flawed? I would have thought it was the later but they way the article is written at the moment IMHO it suggests AACS itself is one of the worst choices for a content protection system Nil Einne 02:45, 5 June 2006 (UTC)
thread_title:  AACS 

message: Masakazu Honda @ ITMedia reports about the final review version of the AACS contents management system
 BluRay Region Coding Announced - Japan & US Same Region Code
----
Question asked by  that i moved from the main article: 
:Is there a WikiPedia page for "BD+" dynamic encryption scheme?  I couldn't find one other than Blu-ray_Disc#Digital_Rights_Management
You may like to read about this http://gear.ign.com/articles/691/691408p1.html
Restrictions on older HDTV for BluRay and HD-DVD by AACS 
:Yes, there's an article titled "BD+". :) -- intgr 15:29, 28 December 2006 (UTC)
thread_title:  Moved Stuff 

message: I may not be looking at the right sources, but I haven't heard a responce from hollywood, aka microsoft, disney, yadda yadda.. My guess is that they will take legal action, change liscence agreements or try to form some aliances with outsiders, I have doubt they will just drop the ball and let Fair use and freedom reign for the people. —The preceding unsigned comment was added by 71.131.129.96 (talk) 02:40, 1 January 2007 (UTC)
thread_title:  Hollywood's take on this 

message: "However, Muslix64 claims to have found title keys in main memory while playing HD-DVD disks using a software player, and that finding them is not difficult. [1]Details of how to do this have not been revealed.
On January 2, 2007 "muslix64" published a new version of his/her program, with volume key support.[5]"
I've read on several news sites now (including digg) that people other than Muslix64 have found title keys in memory
* Arnezami seems to have done the same thing, but better. Read the Outside liks. Crakkpot 20:52, 13 February 2007 (UTC)
thread_title:  Article outdated? 

message: Here are some news articles that can be added to the article concerning the defeat of AACS:
* Interview with Muslix64
* AACS's Response
* Another article on the response
* Reference for when pirated movies were released
Hopefully those references will make this a better article. Xuanwu 06:37, 27 January 2007 (UTC)
thread_title:  Additional References 

message: I think it should be mentioned in the article, how players can decode older films. To make what I mean clearer. Take film A and film B. Then take Player X and Player Y. Film A is older than B, and player X is older than Y. Then suppose, player Y is made after film A is published. It can decrypt film B, because film B has a key included for Player Y, but how does it decrypt film A? Does it use Player X's key? I think this might be in the article, but its not very clear. Could someone clarify? - Рэдхот(t • c • e) 18:21, 30 January 2007 (UTC)
thread_title:  Backwards Compatibility 

message: Please merge any relevant content from [ Arnezami] per Wikipedia:Articles for deletion/Arnezami.   (If there is nothing to merge, just leave it as a redirect.)  Thanks. —Quarl (talk) 2007-02-18 09:07Z
The Arnezami section effectively repeats the fact that he used a USB method, perhaps this can be re-written? 143.52.5.182 11:26, 20 March 2007 (UTC)
thread_title:  Merge from [[Arnezami]] 

message: I've been bold and restructured this article. The results are available at User:Ksero/AACS. Please replace the current article with the new version if you find it worthy. — Ksero 12:14, 2 May 2007 (UTC)
replies: text: I like it. I'd support switching the version on Ksero's page with the one currently online...and I think sooner would be better than later, because the longer we wait, the more new information is going to be added to the version currently here, and will have to be moved over to the restructured version afterwards. --Kadin2048 15:34, 3 May 2007 (UTC)
replies: text: I predict the article will be unprotected once the key posting frenzy passes. Any major rewrite should wait until then. CMummert · talk 18:28, 3 May 2007 (UTC)
thread_title:  Restructuring 

message: Since AACS uses several layers of encryption and different keys, the article might appear somewhat confusing. An image like  might be appropriate, defining some of the nomenclature. I kind of feel like that would be too detailed for an encyclopedic entry, but at the same time it's difficult to explain the significance of stories like  without those details. — Ksero 12:11, 2 May 2007 (UTC)
thread_title:  Add an illustration? 

message: There should probably be a link to HD DVD encryption key controversy in the article. Also, BBC news article on the entire issue. Could an admin please add

in an appropriate place in the article? See the request and discussion (part of which is copied here) on the talk page of HD DVD. Thanks WLDtalk|edits 07:56, 3 May 2007 (UTC)
replies: text: I added that template in the right spot. CMummert · talk 18:29, 3 May 2007 (UTC)
replies: text: Thank-you very much. WLDtalk|edits 19:35, 3 May 2007 (UTC)
thread_title:  [[HD DVD encryption key controversy]] 

message: Article is now back down to semi, now, thanks to none other than Jimbo Wales. Have at it, folks but please - keep the codespam out :) - Alison ☺ 19:45, 3 May 2007 (UTC)
thread_title: Article protection

message: I recently found this article. I'd like to hear your thoughts on how it relates to AACS. I think we should at least link to that article somewhere. Could we call SPDC the "theoretical foundations of AACS" or something? —The preceding unsigned comment was added by Ksero (talk • contribs) 01:19, 4 May 2007 (UTC)
thread_title:  [[Self-Protecting Digital Content]] and AACS 

message: Surely, the primary objective of the article is to describe aacs. The issue of security breaches is ancillary to the main subject, and if it warrants extensive coverage, then that should be in a separate entry altogether. As regards publishing keys, I would dispute that publication of a key that is part of a genuine player is also a circumvention device component, and if the DMCA says that it is, then you start to extend copyright law to prohibit the dismantling or examination of owned devices, or publishing factual details of what you find inside them. But having said that, I don't see any valid reason to publish such a key here - even if it were to be determined lawful to do so. Minician 18:44, 4 May 2007 (UTC)
replies: text: The controversy is already covered on AACS encryption key controversy (with a reference to the actual key); there is an essay about posting the key at Wikipedia:Keyspam. Jimmy Wales has stated "Take it slow, see how things are going, don't get weird ideas about either side oppressing you" so I guess we'll see what happens. -- intgr 20:21, 4 May 2007 (UTC)
replies: text: Note that AACS encryption key controversy is now linked to from the article. DES (talk) 20:30, 4 May 2007 (UTC)
replies: text: There was already a wikilink to AACS encryption key controversy in the "Memory-space snooping attacks"-section. The Hdkeys.com site supposedly contained Volume Keys (specific for each movie). The famously leaked key was a Processing Key (which works for all movies) . Do you find the controversy to be hard to find? Should it be more prominent? —The preceding unsigned comment was added by Ksero (talk • contribs) 00:50, 5 May 2007 (UTC)
thread_title:  Object of the article 

message: I propose that we merge Volume Identifier into this article. I think Volume Identifier is a bit too short to stand on its own (or should we start articles on Processing Key, Device Key, and all the other cryptographic keys used by the AACS? — Ksero 14:06, 5 May 2007 (UTC)
thread_title:  Merge proposal 

message: The talk surrounding the hd dvd controversy died as soon as it started. Because of the now non-issue, I have removed  from the article. Feel free to revert if you feel it appropriate.--Sludge 04:01, 6 May 2007 (UTC)
thread_title:  Current article 

message: For all those interested in perhaps expanding the technical section of the article a bit I would like to point at this forum thread:  This is a great introduction to the technology for those who have less experience with the subject. --TheDJ (talk • contribs) 13:48, 31 May 2007 (UTC)
thread_title: New intro to th tech

message: I've been looking at the Managed Copy article, and I'm leaning towards merging it into the relevant section here, leaving Managed Copy as a redirect. Anyone against? — Ksero 23:59, 31 October 2007 (UTC)
replies: text: The main reason I created it was so that if anyone searched for "Managed Copy" the article would magically appear. I don't mind putting the info into AACS, as long as it is still easily findable.Peter Torr (MSFT) 01:31, 1 November 2007 (UTC)
thread_title:  merging Managed Copy? 

message: entries 13 and 19 link to the same information  —Preceding unsigned comment added by 137.132.3.7 (talk) 21:37, 4 November 2007 (UTC)
replies: text: Fixed, thanks for reporting! -- intgr [talk] 23:39, 4 November 2007 (UTC)
thread_title:  repeated entries in the references 

message: > The PC platform offers no way to prevent memory snooping attacks on such keys, since a PC configuration can always be emulated by a virtual machine, in theory without any running program or external system being able to detect the virtualization. <
Which is not true. It is actally very easy to sense the difference between a true iron PC and a VMware environment, as the emulator will always fail to mimic some weird and provincial opcodes found in actual X86 processors. Most of these are slightly faulty instructions, which have survived decades encoded in successive generations of silicon, because nobody uses them and nobody cares a enough about them to implement a mask fix.
Yet, many rootkits and other kinds of sophiticated computer malware already use these to check if they are being run in a virtual environment or not. If the particular instruction works weird, all is OK, it is an "iron" PC and lets continue infecting the hapless user for profit. If the weirdness is not present in the result or the instruction returns null, your are either in VMware or Virtual PC 2007 and this means some malware analyst is trying to reverse engineer you. Therefore the advanced malware either shuts itself down or alters its own behaviour to foil the researcher. Very clever and happens all the time nowadays, because for-profit written malware advances at near light speeds.
There is nothing to prohibit hi-def players doing the same checks to prevent key-finding analysis in a virtual environment. 82.131.210.162 (talk) 15:55, 15 May 2008 (UTC)
replies: text: Fixed your link --Ysangkok (talk) 19:29, 29 July 2012 (UTC)
thread_title:  Whoever wrote this article has no clue about virtual environments. 

message: I don't think a machine that is aacs compliant would necessarily have the Verance technology in it.  —Preceding unsigned comment added by 99.207.133.25 (talk) 16:03, 27 January 2010 (UTC)
replies: text: There is a separate article for Cinavia now. I removed most of the audio watermarking text and replaced it with a reference to the Cinavia article. The Cinavia "audio watermarking" (which is more specifically a form of steganography) is not part of AACS in terms of technology, but it is now a requirement for commercial players in terms of licensing. - Artificial Silence (talk) 09:32, 11 October 2010 (UTC)
thread_title:  audio water marking  

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thread_title:  External links modified 

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thread_title:  External links modified 

message: I just added the update tag, this article contains many sections which talks about "future" use in blu-ray, but blu-ray has been available for a long time. Presumably the upcoming decisions it talks about have now been made. --David G (talk) 01:05, 13 August 2017 (UTC)
thread_title:  Out of date