Alexander von Kryha and his encryption machines. (English) Zbl 1215.01015

Summary: Alexander von Kryha (1891–1955) dedicated at least 15 years of his life to encryption machines of his own development. His machines competed with the Enigma in the 1920s and with Hagelin’s machines in the 1950s, but they were cryptographically much too weak to succeed. It is the tragedy of Alexander von Kryha that he made a huge effort in marketing his machines, but did not realize that he was dealing with one of the poorest designs ever. In 1955 Kryha committed suicide, while his company went bankrupt.


01A60 History of mathematics in the 20th century
94A60 Cryptography

Biographic References:

von Kryha, Alexander
Full Text: DOI


[1] Kahn D., The Codebreakers (1996)
[2] Deavours C., Machine Cryptography and Modern Cryptanalysis (1985) · Zbl 0905.94003
[3] Heyde G., Illustrirte Wochenzeitung 172 (1929)
[4] Hamel G., Die Kryha-Chiffriermaschinen. Ein Mathematisches Gutachten (1929)
[5] Schmitt J., Organisation Betrieb-Büro 30 (1928)
[6] Schwarte D., Heerestechnik 6 (1928)
[7] Fitz I., Illustrierte Technik für Jedermann (1927)
[8] Küttner I., Wissen und Fortschritt 6 (1928)
[9] DOI: 10.1080/0161-110491892926 · doi:10.1080/0161-110491892926
This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. In some cases that data have been complemented/enhanced by data from zbMATH Open. This attempts to reflect the references listed in the original paper as accurately as possible without claiming completeness or a perfect matching.