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Take into account that Ultra (breaking of enigma) was only made public in 1970s (or 1960s if you count information about Polish intelligence breaking enigma bef
by isbvhodnvemrwvn 6y ago
Take into account that Ultra (breaking of enigma) was only made public in 1970s (or 1960s if you count information about Polish intelligence breaking enigma before WWII). NSA only stopped using similar rotor-based designs in 1980s.