Timeline 00 - 1600 AD 3rd cent. Leiden papyrus: medical information gets enciphered to stop abuses 8th cent. - Abu 'Abd al-Rahman al-Khalil ibn Ahmad ibn 'Amr ibn Tammam al Farahidi al-Zadi al Yahmadi finds the solution for a Greek cryptogram by first of all finding out the plaintext behind the encryption, a method which never got out of date. Afterwards he writes a book on cryptography. - cipher alphabets for magicians are published 1250 the English monk Roger Bacon writes cipher-descriptions. At that time the art of enciphering was a popular game in monasteries 1379 Gabrieli di Lavinde develops the nomenclature-code for Clement VII (114); a code-system made out of ciphers and codes, which kept being irreplaceable until the 19th century 1392 (probably) the English poet Geoffrey Chaucer writes the book The Equatorie of the Planetis, which contains several passages in ciphers made out of letters, digits and symbols 1412 for the first time ciphers including different substitutions for each letter are developed (in Arabic) ~1467 invention of the "Captain Midnight Decoder Badge", the first polyalphabetic cipher (disk); the inventor, Leon Battista Alberti, also called the father of Western cryptography, uses his disk for enciphering and deciphering at the same time 15th/16th century nearly every state, especially England and France, has people working on en- and deciphering for them 1518 the first printed book on cryptology is written by the German monk Johannes Trithemius. He also changes the form of polyalphabetic cipher from disks into rectangulars 1533 the idea to take a pass-phrase as the key for polyalphabetic cipher is realized by Giovan Batista Belaso 1563 Giovanni Battista Porta suggests to use synonyms and misspellings to irritate cryptoanalysts 1585 Blaise de Vigenère has the idea to use former plaintexts or ciphertexts as new keys; he invents the Vigenère tableau. David Kahn points out that this technique had been forgotten soon afterwards (until the end of the 19th century) 1587 Mary, Queen of Scots, is beheaded for the attempt to organize the murder of Queen Elisabeth I., whose agents find out about Mary's plans with the help of decryption 1588 the first book in shorthand is published

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Timeline 1970-2000 AD 1971 IBM's work on the Lucifer cipher and the work of the NSA lead to the U.S. Data Encryption Standard (= DES) 1976 Whitfield Diffie and Martin Hellman publish their book New Directions in Cryptography, playing with the idea of public key cryptography 1977/78 the RSA algorithm is developed by Ron Rivest, Adi Shamir and Leonard M. Adleman and is published 1984 Congress passes Comprehensive Crime Control Act - The Hacker Quarterly is founded 1986 Computer Fraud and Abuse Act is passed in the USA - Electronic Communications Privacy Act 1987 Chicago prosecutors found Computer Fraud and Abuse Task Force 1988 U.S. Secret Service covertly videotapes a hacker convention 1989 NuPrometheus League distributes Apple Computer software 1990 - IDEA, using a 128-bit key, is supposed to replace DES - Charles H. Bennett and Gilles Brassard publish their work on Quantum Cryptography - Martin Luther King Day Crash strikes AT&T long-distance network nationwide 1991 PGP (= Pretty Good Privacy) is released as freeware on the Internet, soon becoming worldwide state of the art; its creator is Phil Zimmermann - one of the first conferences for Computers, Freedom and Privacy takes place in San Francisco - AT&T phone crash; New York City and various airports get affected 1993 the U.S. government announces to introduce the Clipper Chip, an idea that provokes many political discussions during the following years 1994 Ron Rivest releases another algorithm, the RC5, on the Internet - the blowfish encryption algorithm, a 64-bit block cipher with a key-length up to 448 bits, is designed by Bruce Schneier 1990s work on quantum computer and quantum cryptography - work on biometrics for authentication (finger prints, the iris, smells, etc.) 1996 France liberates its cryptography law: one now can use cryptography if registered - OECD issues Cryptography Policy Guidelines; a paper calling for encryption exports-standards and unrestricted access to encryption products 1997 April European Commission issues Electronic Commerce Initiative, in favor of strong encryption 1997 June PGP 5.0 Freeware widely available for non-commercial use 1997 June 56-bit DES code cracked by a network of 14,000 computers 1997 August U.S. judge assesses encryption export regulations as violation of the First Amendment 1998 February foundation of Americans for Computer Privacy, a broad coalition in opposition to the U.S. cryptography policy 1998 March PGP announces plans to sell encryption products outside the USA 1998 April NSA issues a report about the risks of key recovery systems 1998 July DES code cracked in 56 hours by researchers in Silicon Valley 1998 October Finnish government agrees to unrestricted export of strong encryption 1999 January RSA Data Security, establishes worldwide distribution of encryption product outside the USA - National Institute of Standards and Technologies announces that 56-bit DES is not safe compared to Triple DES - 56-bit DES code is cracked in 22 hours and 15 minutes 1999 May 27 United Kingdom speaks out against key recovery 1999 Sept: the USA announce to stop the restriction of cryptography-exports 2000 as the German government wants to elaborate a cryptography-law, different organizations start a campaign against that law - computer hackers do no longer only visit websites and change little details there but cause breakdowns of entire systems, producing big economic losses for further information about the history of cryptography see: http://www.clark.net/pub/cme/html/timeline.html http://www.math.nmsu.edu/~crypto/Timeline.html http://fly.hiwaay.net/~paul/cryptology/history.html http://www.achiever.com/freehmpg/cryptology/hocryp.html http://all.net/books/ip/Chap2-1.html http://cryptome.org/ukpk-alt.htm http://www.iwm.org.uk/online/enigma/eni-intro.htm http://www.achiever.com/freehmpg/cryptology/cryptofr.html http://www.cdt.org/crypto/milestones.shtml for information about hacker's history see: http://www.farcaster.com/sterling/chronology.htm:

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David Kahn David Kahn can be considered one of the most important historians on cryptography. His book The Codebreakers. The comprehensive history of secret Communication from Ancient Times to the Internet, written in 1996 is supposed to be the most important work on the history of cryptography.

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Whitfield Diffie Whitfield Diffie is an Engineer at Sun Microsystems and co-author of Privacy on the Line (MIT Press) in 1998 with Susan Landau. In 1976 Diffie and Martin Hellman developed public key cryptography, a system to send information without leaving it open to be read by everyone.

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