Original: Because most of these cases became well-known in the context of the anti-Communist 1950s , there has been long-standing dispute over the exact details of these cases , though some of this was settled with the making public of the VENONA Project transcripts , which were intercepted and decrypted messages between Soviet agents and the Soviet government .
Simplified: There has been much disagreement over the exact details of these cases , though some of this was settled when VENONA Project transcripts were made public . These were secret messages between Soviet agents and the Soviet government that were discovered and decoded .