Re: [projectvrm] Watermarking personal data

[Doc Searls < >]

Thanks. 

The question came up in a conversation, and I though I'd pass it along before 
I forgot it. 

You're right that it depends on the kind of data, and also on the context.

Doc

On Oct 8, 2013, at 11:15 AM, Johannes Ernst 
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 wrote:

> 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 
> <
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>  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
>