28 Mar 2000
MI5 last week gave an object lesson in why data on all parts of the network needs to be protected by strong encryption when one of its agents had a notebook stolen containing sensitive documents concerning the service's activities in Northern Ireland. However, MI5 security chiefs could console themselves with the knowledge that the information was strongly encrypted and unlikely to be cracked. In this week's issue we break the enigma on encryption and reveal how code-making and code-breaking has been a key part of Britain's military machine for years.
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