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.

Note: This tag is obsolete! Nothing is public domain without a reason. Don't use this generic template - please use instead: {{PD-old}} (for works out of copyright where the author has been dead for over 70 years), {{PD-Art}} (for photos of old paintings and art out of copyright), {{PD-ineligible}} (for trivial work), {{PD-USGov}} (for work by the U.S. federal government), {{PD-self}} (if the uploader and creator releases the rights), {{PD-user|user}} (if another user released his/her rights), or {{Copyrighted free use}}. use {{PD-user-w|projectcode|projectname|username}} for users with no account on Commons. {{PD-author|Author's name}} - for works released into the public domain by non-Wikimedia users. If the work is PD for another reason, check the copyright tag page or use {{PD-because|reason}}. العربية | Български | Česky | Deutsch | English | Español | Français | हिन्दी | Italiano | 日本語 | ‪Norsk (bokmål)‬ | ‪Norsk (nynorsk)‬ | Português | Русский | Slovenčina | Slovenščina | Српски / Srpski | Polski | Türkçe | 中文 | +/-

Les pages ci-dessous contiennent cette image :

• Auguste Kerckhoffs
• Arithmétique modulaire