Venona
Orloff's cover name in Soviet intelligence, and as deciphered by Venona project cryptographers, is OSIPOV. Orloff is referenced in the following Venona project decryptions:
229. Venona 854 KGB New York to Moscow, 5 June 1943; 934–935 KGB New York to Moscow, 17 June 1943; 952 KGB New York to Moscow, 21 June 1943; 613–614 KGB New York to Moscow, 3 May 1944; 725 KGB New York to Moscow, 19 May 1944; 750 KGB New York to Moscow, 26 May 1944; 163 KGB Moscow to New York, 19 February 1945; 239 KGB Moscow to New York, 17 March 1945; 767 KGB Moscow to New York, July 1945.
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