backtop


Print 64 comment(s) - last by glennpratt.. on Jan 4 at 3:10 AM

BackupHDDVD may be this generations DeCSS

This article was first published on HWUpgrade.com

It hasn’t been completely verified yet, but a user named "muslix64" has posted an exploit in a thread on the Doom9 forum claiming he has been able to circumvent AACS, the encoding format used to protect HD DVD and Blu-ray content.

"Muslix64" claims to have completely backed up an HD DVD movie and provides a Rapidshare link to download BackupHDDVD, a small Java-based utility that aids users to backup their HD DVDs. A YouTube link to see the program in action has also been posted.

"Muslix64" describes the utility as "a java based command line utility that decrypt video files (.evo) from a HD DVD disk that you own, to your hard drive and you can play them back with a HD DVD player software."

Although much of the dirty work in backing up an HD DVD movie is done by the tool, users are still required to find their own cryptographic keys for the disc being copied. No guidance is provided to help users find the keys but the author suggests the process is trivial, which suggests some exploit in the player software or hardware exists as the keys are not meant to be easily obtained.

Although the exploit hasn’t been completely confirmed yet, if it turns out to be true it could mean a number of things. For one, it is possible that we might start seeing pirated HD DVD content. In addition, since Blu-ray also uses AACS, we might see a similar crack be released for Blu-ray movies in the next couple of weeks.

"Muslix64" claims the tool works on his XBOX 360 external HD DVD player, but that the software should not be limited to just one specific player.


Comments     Threshold


This article is over a month old, voting and posting comments is disabled

Keys are revocable.
By Eug on 12/28/2006 1:33:57 PM , Rating: 2
Part of the AACS spec is to include revocable keys. So, the key for this is going to be changed. It was designed this way specifically to address issues like this.




RE: Keys are revocable.
By sabrewulf on 12/28/2006 1:56:14 PM , Rating: 3
So? Once all the protection is removed, you don't need the keys anymore anyway, right?


RE: Keys are revocable.
By Eug on 12/28/2006 3:14:05 PM , Rating: 3
The reason why so many people decrypt and backup DVDs is because they can. However, on HD DVD (and Blu-ray), once one person does it by using the decryption key, that destroys it for everyone else, cuz the player's decryption key gets revoked.

This key revocation doesn't happen with DVD, so everyone can rip DVDs, and thus ripped DVDs are widely avaiable.


RE: Keys are revocable.
By jimmy43 on 12/28/2006 2:20:59 PM , Rating: 2
Can't revoke a key if you dont let it connect to the net. Pretty much the first step to pirating any software is turning off automatic updates, so it shouldnt be a problem.


RE: Keys are revocable.
By Martin Blank on 12/28/2006 2:59:36 PM , Rating: 2
Doing so may prevent viewing of material released later, as the spec allows for issuance of new cryptographic materials. You may be able to watch everything up to the date of the update, but not a single thing after that.


RE: Keys are revocable.
By Eug on 12/28/2006 3:01:13 PM , Rating: 2
"Can't revoke a key if you dont let it connect to the net. Pretty much the first step to pirating any software is turning off automatic updates, so it shouldnt be a problem."

Except that you won't be able to play new discs with that player. I'd say that's a pretty big problem. ;)


RE: Keys are revocable.
By InternetGeek on 12/28/2006 2:27:17 PM , Rating: 2
I agree. It will turn into a game of revoke/crack pretty much like virus/antiviruses. So on the end things ended up being the same: Rip the movie, encode into a smaller format with similar quality, burn, and for those into that kind of stuff, sell it on the street for pennies.

I'm not advocating copyright infringement, but I thought the investment in hd-dvd/blue-ray, beyond the improvement in quality, was to get rid of piracy once and for all.

On the end I could just have an unplugged PC doing all the ripping. All I would have to do is figure a way to get rid of any watermarks or other security tags and voila.


RE: Keys are revocable.
By Eug on 12/28/2006 3:05:13 PM , Rating: 1
"On the end I could just have an unplugged PC doing all the ripping. All I would have to do is figure a way to get rid of any watermarks or other security tags and voila."

That will only work for old discs. Discs released later likely won't work on the old player.


RE: Keys are revocable.
By InternetGeek on 12/28/2006 4:23:29 PM , Rating: 2
How long until someone circumvents that as well?



RE: Keys are revocable.
By Eug on 12/28/2006 4:26:39 PM , Rating: 2
"How long until someone circumvents that as well? "

No idea, but the point was that BackupHDDVD doesn't have the same significance as DeCSS.


RE: Keys are revocable.
By InternetGeek on 12/29/2006 5:09:56 AM , Rating: 2
Do you think so?. It actually took a shorter time since release to get a ripping tool when compared with DVDs. I'm sure it won't be long until they also break the keys. I'm not trying to be a fatalist, but I suspect HD formats won't really fly until someone cracks them.


RE: Keys are revocable.
By mrxavia on 12/29/2006 9:13:58 AM , Rating: 2
The Keys are in the HDMI part of it, to stop you from watching HD content on a non protected tv, I read the spec, and it seems easy enough to fool. But the real problem with is is that all you need to make this worthless, is for a major LCD/Plasma TV manufacturer to have all its HDMI keys made public, that key is revoked, so the next time you buy a new HD-DVD, or use HD-Sky/or HD-Digital TV, it will dissable your HD content!!

I am supprised the manufacturers actually Agreed to this...

I would not be supprised if some rich people with a grudge against restrictions brought TV's, hacked them to get the keys and then published them... And its BYE BYE to the millions of TV's, they would have to be recalled, and some major lawsuits will unfold... I dont see Sony sitting back and loosing money due to a flawd system...


RE: Keys are revocable.
By abhaxus on 12/29/2006 9:58:49 PM , Rating: 2
You are thinking of the keys for HDCP, which are completely different and separate (but possibly more annoying) than AACS.


"When an individual makes a copy of a song for himself, I suppose we can say he stole a song." -- Sony BMG attorney Jennifer Pariser











botimage
Copyright 2014 DailyTech LLC. - RSS Feed | Advertise | About Us | Ethics | FAQ | Terms, Conditions & Privacy Information | Kristopher Kubicki