All terrorist groups are using the Internet to spread their messages. Muslim extremists copped on to the techniques about the same time that Digimarc began encrypting file identifiers with Photoshop in mid-1997. The groups increased their encrypted activities after US law enforcement authorities revealed they were tapping Osama bin Laden's satellite telephone calls from his Afghan base. In one method, bin Laden's operatives change the dots in a picture, replacing their hexadecimal value with encrypted code fragments. Thanks to new digitial television connections, interactive television has started showing itself in homes around England and Ireland.
Important questions linger about the kind of standards used by two-way programme developers.
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