The Soviets verified the intelligence via their spy in Britain, John Cairncross, at the Government Code and Cypher School at Bletchley Park, who clandestinely forwarded raw decrypts directly to Moscow.
Efterretningstjenesten verificerede oplysningerne via deres spion i Storbritannien, John Cairncross, Government Code and Cypher School på Bletchley Park, som i hemmelighed sendte rå dekrypterede dokumenter direkte til Moskva.