Kitty Harris

Kitty Harris was a Canadian-born Soviet secret agent and "long-time special courier of the OGPU-NKVD foreign intelligence during the 1930s and 1940s." Although mentioned by name in Walter Krivitsky’s book I was Stalin’s agent, Harris was identified only in 2001 when her code name "Ada" or "Aida" was found in declassified files from the Venona project. This was a counterintelligence program initiated by the United States Army's Signal Intelligence Service that ran from February 1, 1943 until October 1, 1980.