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Encyclopedia > Horst Feistel

Horst Feistel (30 January 1915(1)14 November 1990) was a cryptographer who worked on the design of ciphers at IBM, initiating research that would culminate in the development of the Data Encryption Standard (DES) in the 1970s. January 30 is the 30th day of the year in the Gregorian calendar. ... 1915 (MCMXV) was a common year starting on Friday (see link for calendar). ... November 14 is the 318th day of the year (319th in leap years) in the Gregorian Calendar, with 47 days remaining. ... This article is about the year. ... Pre-19th century Leone Battista Alberti, polymath/universal genius, inventor of polyalphabetic substitution (see frequency analysis for the significance of this -- missed by most for a long time and dumbed down in the Vigenère cipher), and what may have been the first mechanical encryption aid. ... This article is about algorithms for encryption and decryption. ... International Business Machines Corporation (IBM, or colloquially, Big Blue; NYSE: IBM) is a computer technology firm headquartered in Armonk, NY, USA. The company, which was founded in 1888 and incorporated June 15, 1911, manufactures and sells computer hardware, software, infrastructure services, hosting services, and consulting services. ... General Designer(s) IBM First published 1975 (January 1977 as the standard) Derived from Lucifer (cipher) Cipher(s) based on this design Triple DES, G-DES, DES-X, LOKI89, ICE Algorithm detail Block size(s) 64 bits Key size(s) 56 bits Structure Feistel network Number of rounds 16 Best...

Contents


Life and work

Feistel was born in Berlin in 1915, and moved to the United States in 1934. During World War II, he was placed under house arrest, but nevertheless gained U.S. citizenship on 31 January 1944. The following day he was granted a security clearance and began work for the U.S. Air Force Cambridge Research Center (AFCRC) on Identification Friend or Foe (IFF) devices until the 1950s. He was subsequently employed at MIT's Lincoln Laboratory, then the MITRE corporation. Finally, he moved to IBM, where he received an award for his cryptographic work. His research at IBM led to the development of the Lucifer and Data Encryption Standard (DES) ciphers. Feistel was one of the earliest non-government researchers to study the design and theory of block ciphers. is the capital city and a single state of the Federal Republic of Germany. ... 1915 (MCMXV) was a common year starting on Friday (see link for calendar). ... 1934 (MCMXXXIV) was a common year starting on Monday (link will take you to calendar). ... Combatants Allies: Poland, British Commonwealth, France/Free France, Soviet Union, United States, China, and others Axis Powers: Germany, Italy, Japan, and others Casualties Military dead:17 million Civilian dead:33 million Total dead:50 million Military dead:8 million Civilian dead:4 million Total dead:12 million World War II... January 31 is the 31st day of the year in the Gregorian calendar. ... 1944 (MCMXLIV) was a leap year starting on Saturday (the link is to a full 1944 calendar). ... In telecommunications, identification, friend or foe (IFF) is an identification system designed for use during hostile conditions, that enables military aircraft, or both civilian and military air-traffic controllers to distinguish friendly aircraft, vehicles, or forces from the enemy, and also to track them. ... // Events and trends This map shows two essential global spheres during the Cold War in 1959. ... The Massachusetts Institute of Technology, or MIT, is a university located in the city of Cambridge, Massachusetts, USA. MIT is one of the worlds leading research institutions in science and technology, as well as in numerous other fields, including management, economics, mathematics, linguistics, political science, and philosophy. ... MIT Lincoln Laboratory, also known as Lincoln Lab, is a federally funded research and development center managed by the Massachusetts Institute of Technology and funded by the United States Department of Defense. ... MITRE is a US not-for-profit corporation that manages three federally-funded research and development centers whose main activities are applying computer-based automation to large and complex tasks. ... International Business Machines Corporation (IBM, or colloquially, Big Blue; NYSE: IBM) is a computer technology firm headquartered in Armonk, NY, USA. The company, which was founded in 1888 and incorporated June 15, 1911, manufactures and sells computer hardware, software, infrastructure services, hosting services, and consulting services. ... International Business Machines Corporation (IBM, or colloquially, Big Blue; NYSE: IBM) is a computer technology firm headquartered in Armonk, NY, USA. The company, which was founded in 1888 and incorporated June 15, 1911, manufactures and sells computer hardware, software, infrastructure services, hosting services, and consulting services. ... In cryptography, Lucifer was the name given to several of the earliest civilian block ciphers, developed by Horst Feistel and his colleagues at IBM. Lucifer was a direct precursor to the Data Encryption Standard. ... General Designer(s) IBM First published 1975 (January 1977 as the standard) Derived from Lucifer (cipher) Cipher(s) based on this design Triple DES, G-DES, DES-X, LOKI89, ICE Algorithm detail Block size(s) 64 bits Key size(s) 56 bits Structure Feistel network Number of rounds 16 Best... Encryption Decryption In cryptography, a block cipher is a symmetric key cipher which operates on fixed-length groups of bits, termed blocks, with an unvarying transformation. ...


Feistel lent his name to the Feistel network construction — a common method for constructing block ciphers. In cryptography, a Feistel cipher is a block cipher with a particular structure, named after IBM cryptographer Horst Feistel; it is also commonly known as a Feistel network. ...


Feistel obtained a bachelor's degree at MIT, and his master's at Harvard, both in physics. He married Leona in 1945, with whom he had a daughter. The examples and perspective in this article or section may not represent a worldwide view. ... The Massachusetts Institute of Technology, or MIT, is a university located in the city of Cambridge, Massachusetts, USA. MIT is one of the worlds leading research institutions in science and technology, as well as in numerous other fields, including management, economics, mathematics, linguistics, political science, and philosophy. ... A masters degree is an academic degree usually awarded for completion of a postgraduate or graduate course of one to three years in duration. ... Harvard University is a private university in Cambridge, Massachusetts, USA, and a member of the Ivy League. ... A Superconductor demonstrating the Meissner Effect. ... 1945 (MCMXLV) was a common year starting on Monday (the link is to a full 1945 calendar). ...


References

Whitfield Diffie Bailey Whitfield Whit Diffie (born June 5, 1944) is a US cryptographer and one of the pioneers of public-key cryptography. ... Scientific American is a popular-science magazine, published monthly since August 28, 1845, making it the oldest continuously published magazine in the United States. ... Steven Levy is an American journalist who has written several books on computers, technology, cryptography, the Internet, cyber security and privacy. ... Crypto: How the Code Rebels Beat the Government Saving Privacy in the Digital Age (ISBN 0140244328) is a book written by Steven Levy about cryptography, and was published in 2001. ...

External links

  • Short Biography and Photo (Provided by IBM)
  • Genealogical notes for Horst Feistel

Notes

(1) Both (Diffie and Landau, 1998), and (Levy, 2001) give Feistel's birth year as 1914. The dates included here are based on the genealogical notes. 1914 (MCMXIV) was a common year starting on Thursday. ...


 
 

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