SPY REGISTER / REPORTING & ANALYSIS

Japan

Intelligence reporting from Japan.

NSA / Spy life · History

Six Messages Gave Genevieve Grotjan a Way Into Japan’s Secret Code

Her discovery opened PURPLE. Her next breakthrough helped unlock KGB traffic.

Retrospective · 24 Oct, 19:35 GMT · 2 min read

NSA / Spy games · History

American codebreakers planted a lie where Japanese intelligence could find it.

History · 22 May 1942 · 2 min read

NSA / Power & scandal · History

Washington closed his bureau. Its former chief put the operation into print.

History · 1 Jun 1931 · 2 min read