The Soviet "Fialka" rotor cipher machine was introduced in 1956; the improved version M-125-3M was used from 1965. There were keyboards in Cyrillic, German, Polish, and Czech for all the countries of the Warsaw Pact. The Fialka, which offered 590 quadrillion combinations, was far more secure than Enigma. The 10 rotors turned in opposite directions, and the Fialka could even encrypt one letter into itself. Most Fialka machines were melted down when the Warsaw Pact disintegrated in 1991.
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