Kryha cipher machine challenge


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The Kryha encryption machine was designed in the 1920s by Alexander Von Kryha.

The machine was used by several large companies like Marconi. German diplomacy also used it.

Problems (notes)

1st Problem
(very easy)
Bart den Hartog
21/03/17
Luigi Tomelli
14/04/19
. . . . . . . . . .
2nd Problem
(easy)
Bart den Hartog
21/03/17
Luigi Tomelli
14/04/19
. . . . . . . . . .
3nd Problem
(medium)
Luigi Tomelli
14/04/19
. . . . . . . . . . .
4th Problem
(medium)
Luigi Tomelli
14/04/19
. . . . . . . . . . .
5th Problem
(difficult)
Luigi Tomelli
14/04/19
. . . . . . . . . . .