Sony Tries Using Blockchain Tech For Next-Gen DRM (engadget.com)

Sony announced Monday that it's using blockchain technology for digital rights management (DRM), "starting with written educational materials under the Sony Global Education arm of the business," reports Engadget. "This new blockchain system is built on Sony's pre-existing DRM tools, which keep track of the distribution of copyrighted materials, but will have advantages that come with blockchain's inherent security." From the report: Because of the nature of blockchain, which tracks digital transactions in records that are particularly difficult to forge or otherwise tamper with, its application as a DRM tool makes sense and may also help creators keep tabs on their content. Currently, it's up to creators themselves (or the companies they create for) to monitor their contents' rights management. Sony's system could take over the heavy lifting of DRM. The way blockchain works allows Sony to track its content from creation through sharing. This means that users of the blockchain DRM tool will be able to see -- and verify -- who created a piece of work and when. Sony Global Education is the current focus of the DRM tool, but going forward, the company hints that the rest of its media -- including entertainment like music, movies, and virtual reality content -- may be protected the same way.

Comments

What value added?

[arth1]

I fail to see what value a blockchain adds here over, say, signed certificates. Can someone explain the added value to either content creator, copyright holder or consumer that requires blockchain?

Re:What value added?

[Sarten-X]

My guess (and it is purely a guess, since TFS and TFA are so light on detail) is that transactions involving works will be logged in a blockchain. I buy a movie, and that purchase is linked to my particular account. I can then loan that movie to someone else, and the transfer gets logged. When it's returned to me, that's logged, too... Unless I happen to be disconnected from the blockchain-handling system, in which case I'd be stuck with the last-known state of property ownership.

If everything works like that, then a content owner could track their creation and see that I loaned a movie to someone... because apparently that's something Sony thinks they care about. Like many other DRM systems, it also allows Sony to revoke rights to works by authoritatively transferring them away, unless there's a crypto method to authorize a transfer (which is not indicated in TFS or TFA).

Pretty much, it provides nothing of technical value that wouldn't be served better by a central database. For marketing value, though, blockchain's an excellent choice right now.

Re:What value added?

[Anonymous Coward]

How can they tell where a file came from and so on?

Blockchain records transactions - and unlike a simple log "it cannot be faked". But blockchain will only record transactions that actually gets recorded.

Lets say my brother buy a Sony movie, and this is duly registered in the blockchain. So proof exist that my brother bought that. And he can pass the movie on, and register that fact in the blockchain and so on.

But I am a pirate. I copy his movie. I edit out all the trailers & other commercials. I cut some boring cry scenes.

Then I sell this movie to folks who like having "no commercials". But what do Sony gain from having blockchain here? The piracy is obvious to law enforcement - it is mostly the original movie. Blockchain do not aid in proving my obvious piracy. If they really watermark every movie differently, then they can see it was my brothers movie that got leaked. But they can't get him for piracy: "Someone may have copied the movie when the kids watched it with their friends". Sony can't demand that customers have good security, they can't hold customers responsible for being burgled or defrauded.

The blockchain has an unfakeable account of transactions. When I sell pirated movies, I obviously don't register the transactions with anyone! My black-market buyers also knows my movies aren't 'legit'. So no trail for Sony to follow.

Perhaps Sony will be able to refuse, if a stupid black-market buyer tries to return a pirated copy to a store - for a refund. But do that happen at all?

 

Re: What value added?

[Anonymous Coward]

Youâ(TM)re technically correct that all you need to do is do a 51% attack, but doing so is specifically impractical. Thereâ(TM)s a concept of agreed-upon finality, where you need to build a certain number of blocks ahead. For bitcoin itâ(TM)s 6 blocks, and every block would cost you a lot more money than just the amount of mined BTC to pay enough mining rigs to do so consistently for an hour. It would cost a few million dollars, assuming you could find a way to rent that sort of hashpower, which isnâ(TM)t really doable. You wonâ(TM)t find a one place or multiple place that would let you rent enough machines for that, so the next option is buying mining rigs yourself. I hope you have really really deep pockets and are ready for quite an architectural/logistics challenge of setting up a few thousand machines.

BlockChains security works by crypto economics. All of them. If you donâ(TM)t take a well established BlockChain then yeah the cryptoeconomic security just isnâ(TM)t there. Thatâ(TM)s why if you want to build anything remotely securely, you should be pegging the information on like bitcoin or ethereum.

Re:What value added?

[mysidia]

I guess the idea is media creators could create a public blockchain describing their works and every playerID or userCode license that has an authorization to disseminate their work. The description of a work could actually contain enough information about various watermarks and identifying features of their works to identify both legitimate copies and Identify decent-quality rogue copies containing an identical picture or more than 30 seconds or so of audio or video: then in order to disseminate ANY work, a compliant playing device would be required to maintain an online connection and take steps to identify what work is being played --- then in order to play a work identified as matching a protected one: the player would be required to login, userId, and apply for a player hardware Id Lease containing the player hardwareId and the manufacturer+hardware IDs of the monitor and every device in the viewing chain (May require submitting a payment); wait for a short-lived Play authorization to appear on the blockchain, and maintain an internet connection to (1) Verify every 60 seconds that the play authorization is still valid for this content, and (2) The player has to transmit all the blockchain records to the HDCP display monitor, digital sound, and every device in the chain, so.... (3) The HDCP monitor also verifies the "play authorization".

The DRM could be combined with a proprietary audo/video encoding package: which would be protected by a patent,
and in order to enforce the DRM policies -- licensing the patent to decode would require that all decoders made available
be only "Compliant players". After every 3 or 4 years, there would be a new encoding/decoding package with a new patent,
and a mandatory online instant update for Compliant Players to remain compliant and be able to continue playing content
that involves removing the hardware's capability to decode media packages that are more than 2 versions behind --
and media leases can no longer be issued for older versions of the media to ensure by the time patent expires - nothing in consumers' hands can play that format anymore.

Re:Idiots

[DarkRookie2]

Is this because of the DRM, or no one really trying since the selection of games exclusive to the console is underwhelming to say the least.
I am betting more the later than the former.

Re:Blockchain BS

[Anonymous Coward]

Where blockchain really shines is when you want a system whereby no individual parties are trusted.

Haha, still no. For a no-trust blockchain to work, you have to trust that the distrust between the parties is enough that there will never be cooperation in excess of 50% of the accounting. Since oligopolies tend to form when big players would rather split a market than compete with each-other, we already have proof that eternal hostility between major parties is not a stable state.

For a time, a no-trust blockchain may operate as intended, but it is a precarious state and will fail into a more stable model of either a single-authentication system or an abandoned waste of energy. Maybe the failure will be after all the early players have died, so they can go to their graves believing that their version was the exception.

So what happens to analog hole and re-encoding?

[140Mandak262Jamuna]

Whatever data is embedded in the created media file needs to survive going through a re-encoding process. For music is ridiculously simple to take a high quality analog output and to re-encode it. For digital, there is supposedly some mild protection in HDMI to stop casual pirating boot legging. But one can always buy a legitimate devices or hack a recorder to identify itself as a TV and download the stream for processing. It can be re-encoded with controlled biases and that can thwart any steganography in the video stream or picture files.

It is very hard to stop pirating. Pirating and boot legging is rampant in India. One film director was bemoaning that he got a congratulatory call from Dubai on his new movie on the day of the release. The company had not even begun movie distribution talks with any Dubai distributor at that time. But Bollywood thrives, they know they are going to get the money in the first week and that is all. Then the content is essentially public domain. People take clips and interpolate with some politician's speech and create funny sequences. They play the sound track and record themselves lip synching (called dub-mash) and redistribute. No one pays any royalty or digital rights. Even if a dub-mash goes viral it does not top the charts because it gets immediately boot legged into hundred you tube videos and the viewer count gets fragmented.

Through it all it some how thrives and makes some money for the creators.

Re:Blockchain BS

[postbigbang]

It's more about transactional integrity. Blockchain is more trivial to code and execute than you might think.

If one takes a vetted (!!) inventory of music and film and media and whatever, and wants to bank it among a group of producers, artists, media companies, and consumers, this method can work to achieve a transaction history of who owns what with what stipulations, and it's wickedly difficult to game.

Not that DRM works. Rather, this is transactional integrity for the lawyers and apps that will be used to assert "rights".

IMHO, it's folly and a waste of money, but rights protection is a mantra in the media business. I allows Wall Street to believe that there is asset protection, therefore stock value and price. In actuality, that's the real "customer" for this blockchain effort. And that's the charade's target: share price.