With reversible data-hiding, however, photographic evidence could be watermarked and secured from tampering the moment the shutter is pressed.

ECONOMIST: MONITOR

To spot watermarked pictures being used illicitly, a program known as a webcrawler can trawl the Internet looking for them.

ECONOMIST: In the picture

His are the sharper ones with his name watermarked on them.

FORBES: Connecting marketers to the Forbes audience. What is this?

"Only a few families said no, " she says, adding that all the documents in the archive are watermarked and "there are all sorts of disclaimers" about credit and reuse.

WSJ: Mari Carmen Ram��rez | Derivative Works No More | Cultural Conversation by Judith H. Dobrzynski

The team made detailed comparisons of the watermarked and unwatermarked versions of the first song, and then analysed the two watermarked songs using their knowledge of past techniques for watermarking.

ECONOMIST: Digital watermarks

Sure, there are a few restrictions: video-on-demand and pay-per-view content will be restricted from the service and recorded shows will be digitally watermarked allowing content to be tracked back to your living room if you get torrent happy with 'em, dig?

ENGADGET: TiVoToGo officially supports PSP and iPod