Terence Eden. He has a beard and is smiling.

Terence Eden’s Blog

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Who is @GCHQ's "barneyrooster"?

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The British intelligence service GCHQ has been on Twitter since January 2016 - however they only sent their first tweet today. GCHQ@GCHQHello, world. bit.ly/GCHQhello❤️ 1,612💬 453🔁 010:02 - Mon 16 May 2016 As I never tire of saying, Bitly is a terrible at keeping your data private. Simply add a + on to the URL and you can see some really interesting stats about the link and the user who created…

Notes on Digital Surveillance

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A line drawing of Edward Snowden.

Earlier this year, I attended a lecture given by Alan Rusbridger - the outgoing editor of The Guardian - entitled "The World After Snowden." Held at Oxford University, and attended by journalists, technologists, and former spies - it was an exceptionally interesting talk and provoked a lively debate over dinner. In light of the publication of the disastrous Investigatory Powers Bill, I've…

Cryptography and the Coventry Problem

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Photo of an Enigma machine at Bletchley Park.

There's an ethical conundrum which is often posed to military strategists and philosophers alike. In 1940, the Nazi's communications encryption had been broken by the British. Military Intelligence were able to decrypt a signal which indicated that the city of Coventry was to be bombed. The military chiefs took this information to the Prime Minister, Winston Churchill. If he ordered the…