Alexander von Kryha’s encryption machines
Alexander von Kryha (1891–1955) was born in Ukraine and emigrated to Germany after the First World War. In the early 1920s, he developed the Kryha Standard encryption machine, followed by the Kryha Liliput and the Kryha Elektric. These three compatible machines were cryptographically weak and clearly inferior to competing systems such as the Enigma machine.
Although Kryha marketed his devices professionally and with great determination, he refused to acknowledge their technical shortcomings. Despite considerable effort, he was ultimately unsuccessful.
After the Second World War, he made another attempt with the support of wealthy investors. However, by then his machines were already technologically outdated and attracted little interest. By 1955, Kryha was financially ruined and took his own life in Baden-Baden.
Initially, he called himself Alexander Kryha. How he later adopted the noble title “von” remains unknown.
A Kryha Standard in the collection of Günter Hütter. The Kryha Standard (1924) was Kryha’s first cipher machine model.
Its primary target customers were banks, authorities and large corporations, which were expected to use the machine for secure communication. However, these organizations showed little interest in the device.
The Kryha cipher machine was delivered in a high-quality leather case, reflecting its intended market positioning.
While the Kryha cipher machine was visually impressive and elegantly designed, its encryption proved to be relatively weak. Contemporary cryptography experts quickly recognized its vulnerabilities.
Source: National Cryptologic Museum
The Kryha Standard operated using a spring-driven mechanism and was manufactured by a clock factory in Germany’s Black Forest region.
This green example of the Kryha Standard is on display at the Science Museum in London.
The Kryha Liliput resembled a pocket watch. It was fully compatible with the Kryha Standard, allowing messages to be encrypted and decrypted interchangeably between the two devices.
The Kryha Liliput was not a commercial success.
Source: National Cryptologic Museum
Today, Kryha cipher machines are highly sought-after collector’s items. Well-preserved examples of the Standard or Liliput models can fetch prices exceeding 10,000 euros on the collector’s market.
Source: Klaus Kopacz
The Kryha Elektric, the third machine developed by Kryha, likely existed only as a prototype – or possibly even as a non-functional mock-up. No surviving example of the machine is known to exist today.
Kryha’s advertising materials were designed in a highly professional manner.
The cover page of the manual for the Kryha Standard was designed by “Maertens-Freiwald.” Several advertising posters created by this designer – or possibly advertising agency – can still be found online today.
According to some of the posters, Kryha’s machines were supposedly used aboard a Zeppelin – a rather bold exaggeration. What was not exaggerated, however, was Kryha’s cooperation with Marconi Company.
This poster illustrates the intended target audience of the Kryha cipher machines: government agencies, banks, industry, commerce, associations, and the press. In practice, however, demand from these sectors remained very limited. Only the military was willing to adopt encryption machines on a larger scale and pay the high prices required for such technology.
The professionally designed marketing materials helped conceal the weak encryption provided by Kryha cipher machines. Despite their sophisticated presentation, the machines offered only limited cryptographic security.
The Kryha “experimental laboratory” shown here most likely existed only in Kryha’s imagination.
Until his death in 1955, Alexander von Kryha never recognized that his machines were cryptographically too weak to stand a real chance of long-term success.
To me, the Kryha machines are among the most interesting cipher machines. I have given presentations and published articles on them on several occasions.
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