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Rotor cipher machine - this page is a stub

Lacida was an electromechanical cipher machine, also known as a rotor machine, developed around 1938 by Biuro Szyfrów – the Polish Cipher Bureau – and built by the AVA Radio Company in Warsaw (Poland). The name LACIDA was derived from the first letters of the surnames of the developers: Gwido Langer, Maksymilian Ciezki and Ludomir Danilewicz [1]. 1 Also known as LCD.

The machine has several weaknesses. It lacks a commutator (plugboard) – one of the stronger points of the Enigma cipher machine – and has a weakness which involves the reflector and wiring. Nevertheless, it was concidered difficult to break at the time [3].

  1. Or his younger brother Leonard Danilewicz) [1].

  1. Wladyslaw Kozaczuk, Enigma: How the German Machine Cipher was broken...
    ...and how it was read by the Allies in Workd War Two. {English translation)
    Christopher Kasparek, USA, 1984. ISBN 0-89093-547-5.

  2. Krysztof Gaj, Polish Cipher Machine - Lacida
    Cryptologia, Volume 16, Issue 1, January 1992. pp. 73-80.

  3. Wikipedia, Lacida
    Retrieved October 2017.
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Crypto Museum. Created: Thursday 12 October 2017. Last changed: Saturday, 24 February 2018 - 12:05 CET.
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