- Hugo Koch
Hugo Alexander Koch (1869 or 1870 – 1928) was a Dutch inventor who conceived of and patented an idea for machine
encryption — therotor machine , although he was not the first to do so. He is sometimes erroneously credited as the originator of theEnigma machine , although this has been shown to be the work of German engineerArthur Scherbius .Koch, from
Delft , filed for his rotor machine patent on7 October 1919 , and was granted Netherlands patent 10,700 (equivalent to US patent|1533252), held by Naamloze Vennootschap Ingenieursbureau Securitas in Amsterdam. No machine was built from his patents, and, in 1927, he assigned the rights to Arthur Scherbius, the inventor of the Enigma machine. Scherbius had developed the idea of rotor machine encryption independently from Koch, and had filed for his own patent in 1918. Bauer (1999) writes that Scherbius bought Koch's patents "obviously not because he did not own patents before; presumably he wanted to protect his patents".ee also
*
Edward Hebern
*Arvid Damm References
*
Friedrich L Bauer , "An error in the history of rotor encryption devices", Cryptologia 23(3), July 1999, page 206.
*David Kahn , The Codebreakers, 1967.
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