Startup Tries Watermarking Instead of DRM
Loosehead Prop writes "A U.K. startup called Streamburst has a novel idea: selling downloadable video with watermarks instead of DRM. The system works by adding a 5-second intro to each download that shows the name of the person who bought the movie along with something like a watermark: 'it's not technically a watermark in the usual sense of that term, but the encoding process does strip out a unique series of bits from the file. The missing information is a minuscule portion of the overall file that does not affect video quality, according to Bjarnason, but does allow the company to discover who purchased a particular file.' The goal is to 'make people accountable for their actions without artificially restricting those actions.'"
Sounds reasonable. But then how does the copyright holder distinguish between the purchaser engaging in illegal distribution vs being the victim of theft? The article never covers that. I think I can guess how the **AA will react to any watermarked file floating around the net with Joe User's name/account reference embedded in it. They'll call a SWAT team and have Joe's house raided. No proof. Sorry, Joe, for the mess. We're on to harassing the next person we vaguely suspect of illegal distribution.
This sounds perfect. As they say, it makes *me* responsible for the file; I can make millions of copies as backup. Of course I wont give it away, to do so is at my own risk.
The authentication will be a problem of course; it means I will not be able to make an anonymous purchase on the web - something that people are quite reasonably concerned about being able to do. What will it be signed with? My DNA? What about identity theft?
A heck, I give up. I was wrong. It's another stupid idea.
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You thought this was something intended to defeat deliberate large scale pirates? Why would you think that? I mean none of the DRM crap stops them either, so why should this? :)
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Have you tried removing an industrial strength watermark (e.g. DigiMarc)? I tested various watermarks in a course project (Steganography) and it's not so trivial. A large number of watermarks were resistant to encoding, cropping, affine transformations, rotations, etc.
The only way I could successfully remove the watermark without making the image unusable was by diff'ing the original with the watermarked. But where are you going to get the original?
Quite clever, really.
Not those. These. (Look in the upper middle of the screen).
Most people don't seem to see them, and they typically try to make it after a bright flash (which makes them a little less visibile). Personally, they drive me nuts, but so do single projector DLPs.