John Heal - Codes, cyphers and Crptography - from the Ancient Greeks to Online banking

Following the business of the AGM, the talk will take a look at some of the various ways that messages have been kept secret. It has been a constantly evolving process between those trying to keep the secrets, and those trying to "crack" them. While it is obvious why governments or the military may wish to keep secrets, what has this got to do with online banking?

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