Big news on TV last night and in the papers this morning, the arrest of ten people in the USA on spy charges plus all the cloak and dagger world of passwords, message drops and being undercover. Yes, the photos too.
One of the people accused, according to The Times, sent messages back to Moscow inside otherwise open source images available on the internet. So today I’m sure someone will ask me how. The answer is complex and involves an awful lot of maths but it is perfectly possible. This field of mathematics is called steganography and I’m sure there are web sites somewhere that explain how it all works. We looked at it some years ago as a way of embedding data inside an image to enable copyright owners to prove, without doubt, that any given image was “theirs”. We dropped it as there were more manageable ways of achieving the same end.
If you’re tempted to add data to an image (but not encrypted to spy standards) just get to grips with metadata, you can easily add date, place, subject data and even a few personal comments.
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