BD+ DRM Will Prevent Discs Playing In More Than One Player ?

[S Helton]

Saw this over at PC Pro.

http://www.pcpro.co.uk/news/110130/b...echnology.html

Can this be right ? A disc will only play in one player and would become useless if you replaced the player ?

[Bald Monkey]

That's how I understood it...

Hopefully common sense will prevail.

[Pecker]

If this is true, and Joe Public gets wind of it, there's simply no way they'll buy BD.

Can you imagine if your DVD collection was tied to one player in your house and wouldn't work on the others?

Me and the missus regularly start watching a film, get tired, and take it upstairs to watch on our bedroom set up.

We also sometimes watch a film with our little girl, and she likes it so wants to watch it again in her room.

This is absolute madness. I do hope they've got it wrong.

Steve W

[Tony_T]

Don't realy know how DRM works, but I would've thought that something would need to be written to the disc to restrict it...

[charliecossie]

Yes, how *would* the disc know how many players it's been in.....?

[Tony_T]

There's loads of stuff about DRM, for example here

If anyone figures out how this could work on a read only disc maybe they could post their thoughts....

[Pecker]

Reading that, you'd have to assume (if it's right) that each disc will have its own, special serial number.

These discs will then refuse to play on any player which hasn't linked to the network. The network will store information on each disc, matching it to the player on which it first plays.

So, if I buy (for example) Spiderman 3, I put it in my PS3, and it won't play until I hook up to t'internet. Once on, the computer at the other end checks to see if that disc has been played before. If it has been played before, it checks which player it's been played on. If it's my PS3, or if it hasn't been played at all, then it let's me go ahead. If it's been played on another player it instructs my PS3 to refuse to play the disc.

That's what it sounds like to me, and I must stress I'm taking that article at face value.

The numbering system would be easy enough. Each title will have its own ID ('SMan3' or something), followed by an eight digit code. That allows each title to sell up to 100,000,000 discs. Disc one off the production line becomes 'SMan300000000', the second is SMan300000001', etc.

But is it possible/practical/cost-effective to press discs with consecutive numbers (rather than all the same number)?

Steve W

[Drongo]

See here:

The BD+ Technology

The BD-ROM players include a small Virtual Machine (VM, BD+ Content Code interpreter) to provide a basic processing environment for BD+ Content Code. In addition, the VM allows Studios to optionally include Title-specific BD+ Content Code on the Disc.

The Virtual Machine is a small BD+ Content Code interpreter that includes 100 lines of code and 60 instructions, so the impact on player system resources is minimal.

During reproduction of a BD-ROM title, the VM will run the Content Code to apply the Security Check and enable content playback when the player is legitimate. A security code runs continuously during playback in order to correct the corrupted stream and produce viewable content. Media Transform is processed in real time block by using the output from Security VM:

but beware!

When a hack is suspected, content provider can enter into a hack study. Once a hack is confirmed by the manufacturer of suspected Player, then Content Provider can have developed and release BD+ Content Protection code that detects and responds to the hack.

- Advanced Countermeasure (when basic countermeasure code does not work

BD+ includes the ability to load native code (code that runs directly on the player's host process).

http://www.cdrinfo.com/Sections/News...x?NewsId=17598


The Big Blu Brother is alive and well.....

[3rdDegree]

All of this will be the end of any form of HiDef format. Joe Public (and 'philes) simply wont be interested in the hassle and extra cost this will cause.

[sleepyone]

Ok, had a good read at several sites and here's my take on it.

Each BR Title, not each individual disc, will have special security code and software on the disc.

When inserted into a machine this code will check the state of the player, don't know how it does this maybe some codes etc in the players firmware.

If the player checks out ok the disc starts to play. If not the disc wont play.

Now unlike AACS removing this security code from the disc won't work as the security code is also required to unscramble the sections of the disc that have been encrypted and is also required, as described above, to allow the actual playing of the disc in the first place.

And as it is per disc, every time a new Title has it's code cracked the player would need updated with the new code so you can watch this title. So you couldn't buy a player out the shops get it modded then settle down to life with pirated BR discs, you would need at the very least constant software updates with the new BD codes on to watch the latest pirated titles...i think. And if you even thought of playing a legit disc in your player it gets unhacked...as described below.

The studios also have the luxury of being able to update their disc with details of players that been hacked, again don't know what details maybe model and firmware number. the disc apparently also has the capability to un-hack these machines. SO when you get the a new pirated film, go the hassle of downloading a new mod for the software of the machine, you put the disc in and wham, it gets un-hacked anyway as your player has been added to list of players that are compromised.


The above are my own incoherent ramblings and may or may not be correct.

Basically put those that don't pirate should, in theory, not notice anything.

[S Helton]

Please all be aware that since I started this thread the article I linked to has been modified.

This subject is also discussed here: BD+ to be switched on early.

Mods may want to merge ?

[sleepyone]

Originally Posted by 3rdDegree

All of this will be the end of any form of HiDef format. Joe Public (and 'philes) simply wont be interested in the hassle and extra cost this will cause.

From reading the docs, Joe Public shouldn't notice anything while playing BDs as long as they are law abiding. And from what i've read there shouldn't be any extra cost to the consumer and it's been in the BD plans for ages anyway.

[Mr_Sukebe]

As already suggested, this is a duplicate thread.

Inline with my comments on the duplicate, the viability of preventing use on multiple units has clearly not been explored. It's simple not a viable scenario and this is therefore clearly scaremongering.

[peterweg]

The Encryption scheme is unique for each film TITLE or possible per studio. This doesn't mean each disk is locked to a individual player. It allows studio's to have different encryption programs which can evolve over time as they see fit.