Re: limits of watermarking (Re: First Steganographic Image in the Wild)

2001-10-17 Thread Ben Laurie
Adam Back wrote: Another framework is to have players which will only play content with certified copy marks (no need for them to be visible -- they could be encoded in a logo in the corner of the screen). The copymark is a signed hash of the content and the identity of the purchaser.

Re: limits of watermarking (Re: First Steganographic Image in the Wild)

2001-10-17 Thread Michael Shields
In article [EMAIL PROTECTED], Ben Laurie [EMAIL PROTECTED] wrote: b) Even if physical media goes away, individual watermarking blows away multicast - and broadband will just never work without that. It is true that broadband isn't viable if it requires a high-bandwidth from one source to every

Re: limits of watermarking (Re: First Steganographic Image in the Wild)

2001-10-17 Thread Ben Laurie
Adam Back wrote: In my opinion copymarks are evil and doomed to fail technically. There always need to be playble non-certified content, and current generation watermarks seem easy to remove; and even if some really good job of spread spectrum encoding were done, someone would reverse

Re: limits of watermarking (Re: First Steganographic Image in the Wild)

2001-10-17 Thread Adam Back
Ben Laurie wrote: The other obvious weakness in such a scheme is that the player can be modified to ignore the result of the check - rather like defeating dongles, which have yet to exhibit any noticable resistance to crackers. I think though that that weakness is more workablee -- for

Re: limits of watermarking (Re: First Steganographic Image in the Wild)

2001-10-17 Thread Ben Laurie
Matt Crawford wrote: a) I believe physical media will always have higher bandwidth than broadband - why? Because you have to feed the broadband from somewhere, and archive it somewhere. You can use an expensive physical medium to drive your transmission. If you sell atoms, you have to

limits of watermarking (Re: First Steganographic Image in the Wild)

2001-10-16 Thread Adam Back
On Tue, Oct 16, 2001 at 11:30:05AM -0700, Greg Broiles wrote: Adam Back wrote: Stego isn't a horseman, and the press drumming up scare stories around stego is ludicrous. We don't need any more stupid cryptography or internet related laws. More stupid laws will not make anyone safer. I