Kryha Liliput

The Kryha Liliput is a very rare cipher machine in pocket-watch format. The machine consisted of two concentric rings, each featuring an alphabet and numbers. The user would operate it by pushing a lever to step the inner ring a random number of places against the outer ring, thereby changing the relationship between the two.
Although Kryha’s devices were a commercial success, they were cryptographically weak as the period lengths of the codes were generally quite short.
The Kryha Liliput was cryptographically compatible with its “big sister”, the Kryha Standard. Photo: Jan Braun, HNF