Analogue Steganography

Steganography is about hiding stuff in such as way that it isn't even apparent stuff is hidden. For example, you might change predetermined pixels in a digital image so as to encode a hidden message, but not in such a way as to be obvious to anyone looking at said pic.

That's clever, but this is even more clever: a USB drive that doesn't look like a USB drive.

* 2GB flash drive cleverly disguised as a frayed and broken USB cable
* Easily transfer and store files, photos and music
* USB 2.0 with 1.1 backwards compatibility
* Mac, Windows and Linux compatible, of course

(Via Bruce Schneier.)

On Social Bookmarking, Spam - and Steganography

A fine analysis of the threats posed to social bookmarking sites (del.icio.us, digg.com etc) from Alex Bosworth. But for me, the real corker is his idea of steganographic spam.

Steganography involves hiding something in a message so that it is not even apparent there is hidden content - unlike cryptography, where the content is obscured but its presence is obvious. This might be achieved by hiding a message in the pixels of a picture - few enough for their presence not to be obvious to casual observers - that can be extracted using the appropriate software running the right algorithms.

Bosworth would have us imagine steganographic spam - so subtle, we are not even aware that it is there. Fiendish.