Ask the Chatbot Games & Quizzes ProCon History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture Money Videos
Hugo A. Koch
Directory
References
Discover
Rural Irish landscape, Sligo, Ireland.
Why Is Ireland Two Countries?
Iraqi Army Soldiers from the 9th Mechanized Division learning to operate and maintain M1A1 Abrams Main Battle Tanks at Besmaya Combat Training Center, Baghdad, Iraq, 2011. Military training. Iraq war. U.S. Army
8 Deadliest Wars of the 21st Century
Thanksgiving Celebration Traditional Dinner Setting Food Concept
Why Is Thanksgiving in the U.S. Celebrated on a Thursday?
Santa Claus flying in his sleigh, christmas, reindeer
Was Santa Claus a Real Person?
Thanksgiving Turkey with all the sides
Why Do We Eat Turkey on Thanksgiving?
Super Typhoon Noru over the western tropical Pacific Ocean as observed by the Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA Aqua satellite July 31 2017
What Is the Difference Between a Typhoon and a Super Typhoon?
Close up of books. Stack of books, pile of books, literature, reading. Homepage 2010, arts and entertainment, history and society
12 Novels Considered the “Greatest Book Ever Written”

Hugo A. Koch

Dutch cryptologist

Learn about this topic in these articles:

construction of cipher machine

  • Vigenère table
    In cryptology: Developments during World Wars I and II

    …United States, European engineers, notably Hugo A. Koch of the Netherlands and Arthur Scherbius of Germany, independently discovered the rotor concept and designed machines that became the precursors of the best-known cipher machine in history, the German Enigma used in World War II. (See figure.)

    Read More