Steganography with Flickr

yiangocy writes "Steganography is not something new, there have been techniques and available programs for hiding data in pictures/audio files for a long time now. However, one step further is using popular online photo sharing sites, such as Flickr in hiding your data, successfully."

Comments

again?

[thegoogler]

you guys linked another wikipedia article on the front page without notifying them so that it could be locked

owell, its probably goatse now, you guys should just put (NSFW) after all wikipedia links.

Re:I'm against this

[Ckwop]

Rather than worry about trying to detect stegnography, any image posting service could just arbitrarily set all of the least significant bits of jpgs to "1" as part of the image posting process. It might slightly degrade the image, but it would also erase any potential encoded messages.

Not really, the best stego packages use error correcting codes to help mitigate this kind of attack. Some stego packages don't work by using the LSB but by swapping adjacent pixels. The cleaning of the LSB would have no real impact on this type of stego.

Simon

Re:Shifting types & saving content to a remote

[timeOday]

Not necessarily. The flipside of stegonography is "digital watermarking," which is the same thing, except used for copyright enforcement. There has been a lot of work done in creating watermarks which aren't too noticeable, but which are resistant to resampling etc.