Don Coppersmith is a cryptographer and mathematician. He was involved in the design of the Data Encryption Standard block cipher at IBM, particularly the design of the S-boxes, strengthening them against differential cryptanalysis^[1]. He has also worked on algorithms for computing discrete logarithms, the cryptanalysis of RSA, methods for rapid matrix multiplication (see Coppersmith-Winograd algorithm) and IBM's MARS cipher. Don is also a codesigner of the SEAL and Scream ciphers. 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. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... The Data Encryption Standard (DES) is a cipher (a method for encrypting information) selected as an official Federal Information Processing Standard (FIPS) for the United States in 1976, and which has subsequently enjoyed widespread use internationally. ... 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. ... now. ... Differential cryptanalysis is a general form of cryptanalysis applicable primarily to block ciphers, but also to stream ciphers and cryptographic hash functions. ... Flowcharts are often used to graphically represent algorithms. ... In mathematics, specifically in abstract algebra and its applications, discrete logarithms are group-theoretic analogues of ordinary logarithms. ... Cryptanalysis (from the Greek kryptós, hidden, and analýein, to loosen or to untie) is the study of methods for obtaining the meaning of encrypted information, without access to the secret information which is normally required to do so. ... In cryptography, RSA is an algorithm for public-key encryption. ... This article gives an overview of the various ways to multiply matrices. ... In the mathematical discipline of linear algebra, the Coppersmith-Winograd algorithm is the fastest currently known algorithm for square matrix multiplication. ... Note: This article contains special characters. ... SEAL (Software-Optimized Encryption Algorithm) is a very fast stream cipher optimised for machines with a 32-bit word size and plenty of RAM. The first version was published by Phil Rogaway and Don Coppersmith in 1994. ... The Scream cipher is a word-based stream cipher developed by Shai Halevi, Don Coppersmith and Charanjit Jutla from IBM. The cipher is designed as a software efficient stream cipher. ...

In 1972, Coppersmith obtained a Bachelor's degree in mathematics at the Massachusetts Institute of Technology, and a Masters and PhD in mathematics from Harvard University in 1975 and 1977 respectively^[1]. He was a Putnam Fellow each year from 1968–1971, becoming the first four-time Putnam Fellow in history. In 1998, he started Ponder This, an online monthly column on mathematical puzzles and problems. In October 2005, the column was taken over by James Shearer^[2]. 1972 (MCMLXXII) was a leap year starting on Saturday. ... Euclid, Greek mathematician, 3rd century BC, known today as the father of geometry; shown here in a detail of The School of Athens by Raphael. ... The Massachusetts Institute of Technology, or MIT, is a private research university located in the city of Cambridge, Massachusetts, USA. Its mission and culture are guided by an emphasis on teaching and research grounded in practical applications of science and technology. ... Harvard redirects here. ... 1975 (MCMLXXV) was a common year starting on Wednesday. ... For the album by Ash, see 1977 (album). ... The William Lowell Putnam Mathematical Competition, often abbreviated to Putnam Competition, is an annual mathematics competition for undergraduate college students, awarding scholarships and cash prizes ranging from $2,500 to $250 for the top 25 students and $25,000 to $5,000 for the top five schools. ... 1968 (MCMLXVIII) was a leap year starting on Monday (the link is to a full 1968 calendar). ... 1971 (MCMLXXI) was a common year starting on Friday (the link is to a full 1971 calendar). ... 1998 (MCMXCVIII) was a common year starting on Thursday of the Gregorian calendar, and was designated the International Year of the Ocean. ... Mathematical games include many topics which are a part of recreational mathematics, but can also cover topics such as the mathematics of games, and playing games with mathematics. ...

In 2002, Coppersmith won the RSA Security Award for Mathematics^[3].

Coppersmith is currently employed at the Center for Communications Research in Princeton, a division of the Institute for Defense Analyses. The Institute for Defense Analyses (IDA) is a weapons research think-tank that administers three federally funded research and development centers to assist the United States Government in addressing important national security issues, particularly those requiring scientific and technical expertise. ...

References

1. ^ ^a b Coppersmith, Don (May 1994). "The Data Encryption Standard (DES) and its strength against attacks" (PDF). IBM Journal of Research and Development 38 (3): 243.
2. ^ http://researchweb.watson.ibm.com/ponder/
3. ^ Don Coppersmith Wins RSA Security Award for Mathematics

External links

• The Ponder This column
• List of publications