[Squantos]

On the way home today I was listening to Kim Kommando (babe !) talk about this hidden text in pictures. I looked for a source in the pics to see what they were talking of and couldn't find the alphanumeric text they spoke of that could be looked at or altered ?

Anyone know how to do this to a picture ?

[NovemberCharlie]

There's computer programs that do it. It is also used as a way for artists to sign pictures electronically. Not too long ago it was recognized in court as a legal signature.

[Aliska]

"Anyone know how to do this with a picture?"

Simplest way would be to open the picture in say .jpg or .gif format (or .bmp) or other formats with a text editor and look for hidden code. Sometimes in binary newsgroups my browser opens them as gibberish rather than the picture relatively often (a nuisance to a normal binary newsgroup user) but could be done on purpose.

I'm not real up on it, but some formats have unused bits for text that are transparent and you would have to know where and how to look for them like in Photoshop or PSP. I saw a discussion about it on one of my graphics newsgroups but at the time they didn't think much info could be transmitted that way. I thought otherwise.

There would be other techniques using layers (some practically invisible) and isolating the layer with the message, such as in a .pdf or .psp file for download. I thought about trying it myself as a joke before all this happened but didn't get around to experimenting with the idea.

There are probably other imaginative ways to conceal a message just about anywhere on the net. Usenet newsgroups would be a good place to send prearranged signals in regular language although they are mostly in English I believe.

[theneanderthal]

Open the file in a word processing program. You get code. Add text to the file, the next person to open the file in a word processing program can read the text. Pic is unchanged.

[drZ]

http://liquid2k.com/zox/now.jpg�
clean version

http://liquid2k.com/zox/now2.jpg�
digimarked version with text 1999,2001 encoded into image