Here’s a strange cipher device: the front-side is a medal depicting St. George fighting a dragon, the rear-side is a cipher disk. Does a reader know anything about the background of this item?
The Museum für Kommunikation in Frankfurt owns a cipher tool from the 19th century. Not much is known about it. Can a reader find out more?
US crypto collector Marc Sachs has shown me a Burst Encoder from the 1950s. A video explains how this cleverly designed device works.
British collector John Alexander has shown me a beautiful Spanish encryption device. Not much is known about its history. Can a reader find out more?
Alexander Hamilton, one of the Founding Fathers of the United States, has become especially popular since a musical was written about him. Hamilton left behind a 26×26 turning grille.