Sigint Historian

Austerity, belt-tightening, peace dividend: at various points during my career HMG found ways to make my life less simple, either by cutting...

I had an articled published last month in the John Buchan Journal (unsurprisingly, the journal of the John Buchan Society). It is about the...

Last week saw a major release to The National Archives of MI5 files, mainly concerning ‘The Cambridge Five’ or at least the three of them, P...

There was nothing recognisable as Sigint in the UK before the First World War started, but we know a fair amount about interception before t...

Collection Management evolved during the Second World War and was honed to a precision instrument during the Cold War. What I describe belon...

Much of the success of Bletchley Park during the Second World War is owed to the combination of great talent and an atmosphere in which it c...

Chris Smith (@spy_historian) tweeted a series of tweets about the Polish contribution to Enigma cryptanalysis this morning. I copy them here...