Cryptologic History Calendar

1918: German ADFGVX cipher first used.

Wednesday, March 1, 2017

1918: German ADFGVX cipher first used.

Description: 1 March 1918: German ADFGVX cipher was first used. Invented by Colonel Fritz Nebel and introduced in March 1918, the cipher was a fractionating transposition cipher which combined a modified Polybius square with a single columnar transposition.