Re: [projectvrm] Watermarking personal data

[Johannes Ernst < >]

If the personal data in question is an X-Ray, yes you can watermark it.
If it is an avatar image, you possibly can. (it may be too small)
If it is a phone number, you cannot.

(Phone numbers, as an example for lots of personal data, do not have any 
redundancy, so you cannot use that to put your watermark there)

For a full trail, you need the cooperation of the people sharing. In other 
words, the problem cannot be solved with technical means alone.

Cheers,


Johannes.

On Oct 8, 2013, at 6:48, Doc Searls 
<
 >
 wrote:

> Is there yet a way yet to watermark shared data, or to concatenate 
> information about who is sharing it with whom — so if the data arrives at 
> D, it carries evidence it was shared by A with B, who then shared it with 
> C, who then shared it with D.
> 
> Doc