Cipher Bureau (Poland)

Polish mathematician and cryptologist (1905–1980)

Polish mathematician

Polish mathematician and philosopher (1886-1939)

Polish mathematician and cryptologist (1908–1978)

Polish mathematician and cryptographer (1888-1945)

Polish cryptographer (1909-1942)

Cryptologic technique used in World War II

codebreaking device created at Polish Cipher Bureau

Officer of the Polish Army, cryptographer (1892–1965)

thumb|upright=1.7|Cyclometer, devised in the mid-1930s by Rejewski to catalog the cyclic permutation|cycle structure of Enigma [[permutations. At top are the two rotor banks, one with lid open; below is the rheostat at left, and at right the array of lamps and switches labelled with corresponding letters.]] The cyclometer was a cryptologic device designed, "probably in 1934 or 1935," by Marian Rejewski of the Polish Cipher Bureau's German section (BS-4), to catalog the cycle structure of Enigma permutations, thereby facilitating the decryption of German Enigma ciphertext.

Polish engineer

method in cryptology

Neighborhood of Warsaw, Poland

Polish cryptographer (1894-1948)

method for decrypting German Enigma ciphers

Polish cryptologist (1898-1951)

Officer of the Polish Army, Polish cryptographer (1891-1966)

The Lacida, also called LCD, was a Polish rotor cipher machine. It was designed and produced before World War II by Poland's Cipher Bureau for prospective wartime use by Polish military higher commands. Lacida was also known as Crypto Machine during a TNMOC Virtual Talk.

WWII signals–intelligence stations near Paris