There is also some debate over a technique called steganography, which involves embedding secret messages within publicly available files and images on the internet, but there is little evidence so that al-Qaeda has used this.

BBC: NEWS | In Depth | A web wise terror network

Risco endeavored to inject molecular biology into computer sciences, having been inspired by a magazine article about a data encryption technique called steganography, the science of communicating in a manner that hides the existence of the communication.

CNN: Romanian teenager wins 'junior Nobel Prize' competition