Image:Kerkhoffs.jpg

[edit] Summary

Auguste Kerckhoffs, 19th century Dutch cryptographer

This photograph is public domain because it was taken before 1923 (Kerckhoff died in 1903).

In David Kahn's The Codebreakers, this image is credited as:

Eugen Drezen, Historio de la Mondo Lingvo (Leipzig, 1931), 102.

[edit] Licensing

This file has been released into the public domain by the copyright holder, its copyright has expired, or it is ineligible for copyright. This applies worldwide.

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• Auguste Kerckhoffs