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Horst Feistel - (Feistel, Horst)

Page history last edited by Jack Daniel 7 years, 4 months ago

Wikipedia: http://en.wikipedia.org/wiki/Horst_Feistel


Inducted into the (US) National Cyber Security Hall of Fame 2016 http://www.cybersecurityhalloffame.com/

From the Cyber Security Hall of Fame page:

"Cryptographer, inventor of the United States Data Encryption Standard (DES)"

"Horst Feistel is one of the most important figures of modern cryptography. The ubiquitous DES cipher was primarily his invention, and the techniques he developed are still used in most modern block ciphers. Feistel was born in Berlin, Germany in 1915, and immigrated to the United States in 1934. Here, he earned a Bachelor's degree from MIT, and a Master's from Harvard, both in Physics. Despite this, his true calling was cryptography. Unfortunately, his German background aroused suspicion. 

"He worked on crypto systems for the U.S. Air Force and MITRE Corp, both of whom were pressured to halt his research. Eventually, he was able to find a research position at IBM's Thomas J. Watson Laboratory. 

"It was at IBM where Feistel developed the Lucifer cipher, in the early 1970s. The Lucifer algorithm he developed takes 64 bits of text and 64 bits of key material and produces 64 bits of cipher text. The cipher text and the key can be used to recover plaintext, making it a symmetric cipher. The specific method he used to scramble the data became known as a Feistel Network. Lucifer was widely considered to be one of the most secure crypto systems of its time. After a few tweaks mandated by the NSA, such as scaling back the key size to 56 bits, Lucifer was chosen as Data Encryption Standard (DES) for the United States. Feistel died in 1990."

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