Following Hallock's discovery about re-use of key, the unit found several thousand pages of re-use, but no usage more than a second time, that is, a depth of two only could be found. This was discouraging to the cryptanalysts at that time because the conventional wisdom was that re-uses had to be greater than two to be solvable. [REDACTED] This attack, completed in March 1944, failed to produce any results.
Following Hallock's discovery about re-use of key, the unit found several thousand pages of re-use, but no usage more than a second time, that is, a depth of two only could be found. This was discouraging to the cryptanalysts at that time because the conventional wisdom was that re-uses had to be greater than two to be solvable. [REDACTED] This attack, completed in March 1944, failed to produce any results.