In 1996, shortly after Hiss's death, a collection of Venona decrypts was declassified. One of the messages, dated March 30, 1945, refers to an American with the code name Ales. According to the message, Ales was a Soviet agent working in the State Department, who accompanied President Roosevelt to the 1945 Yalta Conference and then flew to Moscow, both of which Hiss did. The message goes on to indicate that Ales met with Andrei Vyshinsky, the Commissar for Foreign Affairs, and was commended for his aid to the Soviets. Analysts at the National Security Agency have gone on record asserting that Ales could only have been Alger Hiss
This is most fascinating. Will we ever know the truth, or just bits and pieces to contemplate?