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Topic: David Chaum

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	David Chaum - Wikipedia, the free encyclopedia
		David Chaum is the inventor of many cryptographic protocols and has contributed to the advancement of electronic cash.
		Chaum founded DigiCash in 1990, an electronic cash company, and is currently a member of the board of directors.
		Chaum gained a doctorate in Computer Science and Business Administration from the University of California at Berkeley.
	en.wikipedia.org /wiki/David_Chaum (123 words)

	David Chaum
		David Chaum’s basic idea rests on the premise that individuals have a right to control their own information and privacy when using technology.
		David Chaum, is a renowned authority in Cryptology, he built up the Center for Information Science in Amsterdam, and founded the International Association for Cryptographic Research.
		David Chaum is also a driving force in the application of theoretical advancements in real-world electronic commerce systems.
	webfoot.csom.umn.edu /faculty/kauffman/courses/8420/Projects/ECash/e-money/chaum.html (362 words)

	How DigiCash Blew Everything (complete)
		David Chaum The name of one man stands out way above anyone else in the history of DigiCash: David Chaum, US citizen, born into a wealthy family, brilliant mathematition and one who had to always have things his own way (2).
		David Chaum was a control freak, someone who couldn't delegate anything to anyone else, and insisted upon watching over everybodys' shoulders.
		David Chaum refused to sell it for less than 1 or 2 dollars per sold copy and that stubborn attitude killed another agreement.
	www.shmoo.com /mail/cypherpunks/feb99/msg00113.html (3460 words)

	David Chaum - Encyclopedia, History, Geography and Biography (Site not responding. Last check: 2007-11-07)
		David Chaum is the inventor of many cryptographic protocols.
		Chaum is widely recognised as the inventor of electronic cash.
		Chaum also founded the International Association for Cryptologic Research (IACR).
	www.arikah.net /encyclopedia/David_Chaum (165 words)

	Undeniable signature - Wikipedia, the free encyclopedia
		Undeniable signatures are a form of digital signature invented by David Chaum and Hans van Antwerpen in 1989.
		To prevent this we have the second property, a method to prove that a given signature is a forgery.
		David Chaum, Hans van Antwerpen: Undeniable Signatures; Crypto'89, LNCS 435, SpringerVerlag, Berlin 1990, 212-216.
	en.wikipedia.org /wiki/Undeniable_signature (175 words)

	dgOnline NEWS > Internet Visionary Travels Back to the Future - E-cash pioneer revisits electronic voting (Site not responding. Last check: 2007-11-07)
		And Chaum was indisputably the pioneer, the first to take e-cash out of the science fiction realm and turn it into cold mathematical truth.
		Chaum renewed his interest in electronic voting in early 2000, when he started to think about how elections in emerging democracies could be internationally validated.
		Chaum's latest idea is for a fool-proof voter receipt that assures the voter his ballot was cast corrently without violating his privacy.
	www.digitalgovernment.org /news/stories/2002/0402/0402chaum_holland.jsp (915 words)

	Business 2.0 - Magazine Article - Printable Version - Tilting at the Ballot Box
		It is, Chaum claims, "the first electronic mechanism that ensures both integrity and privacy." Indeed, as far as I can see, Chaum's invention has only one conceivable drawback: It won't be on the market in time to save us on Nov. 2.
		Chaum's system, Votegrity, produces a paper trail too -- except Chaum throws cryptography into the mix, and that changes the equation.
		For Chaum, who's in the process of rounding up investors and hiring executives for the firm he's starting around Votegrity, such a conflagration would be, perversely, the best news imaginable.
	www.radwin.org /michael/blog/archives/0,17925,683182,00.html (1474 words)

	Numbers That Are Money (Site not responding. Last check: 2007-11-07)
		Chaum is generally agreed to be the father of something called "digital cash," which is like regular cash in that it can be spent with privacy but unlike regular cash in that it has no physical presence.
		Chaum expressed the situation most powerfully in his seminal article on the subject in the August, 1992, Scientific American: "The choice between keeping information in the hands of individuals or of organizations is being made each time any government or business decides to automate another set of transactions.
		In Chaum's system, a bank note is nothing more than a randomly generated number, the validation of which depends on the well-established concept of the "digital signature." This signature has two halves, called keys: a public key, available to everyone, and a private key, which an individual would share with no one.
	www.akst.com /digital.htm (4514 words)

	2.12: E-Money (That's What I Want)
		Chaum's first major papers, published in 1979 when he was a graduate student at the University of California at Berkeley, are indicative of his strong focus in his work: devising cryptographic means of assuring privacy.
		Chaum developed a prototype by which smart cards holding a certain amount of verified cash value could be slipped into a gadget affixed to the windshield, and high-speed scanning devices would subtract the tolls as the cars whizzed by.
		Chaum is not the only person working this turf: building on his ideas, researchers at Sandia Labs have been working on a scheme that attempts to balance anonymity with law enforcement's need to trace criminal transactions.
	www.wired.com /wired/archive/2.12/emoney_pr.html (7620 words)

	Twinning: David Chaum
		David Chaum is the founder and chief technology officer of DigiCash, a pioneering company in electronic cash innovations, and a global leader in smart card technology and secure Internet payment software.
		Chaum founded DigiCash in 1990, and he simultaneously built up a cryptography research group at the Center for Mathematics and Computer Science (CWI) in Amsterdam.
		Chaum makes frequent appearances in popular and trade media, and he is widely consulted on matters of payments system policies and technology direction.
	www.okapi.nl /twinningsite/partners/chaum.htm (232 words)

	Industry Standard, The: The Secret Legacy of David Chaum - People
		A former computer science professor, Chaum started thinking about privacy and financial transactions 20 years ago when he became convinced that vendors didn't need to know buyers' birth dates to verify their purchases.
		Chaum took his passion to the Web about a decade ago, when he invented the world's first digital currency.
		Chaum's dreams of anonymous action also survive in companies like Canada's Zero-Knowledge Systems, which bases parts of its online-privacy software on his innovations.
	www.findarticles.com /p/articles/mi_m0HWW/is_2001_Feb/ai_70909229 (460 words)

	Wired 2.12: E-Money (That's What I Want) (Site not responding. Last check: 2007-11-07)
		My fellow passenger and tour guide is David Chaum, the bearded and ponytailed founder of DigiCash, and the inventor of cryptographic protocols that could catapult our currency system into the 21st century.
		David Chaum has devoted his life, or at least his life's work, to creating cryptographic technology that liberates individuals from the spooky shadows of those who gather digital profiles.
		In the process, he has become the central figure in the evolution of electronic money, advocating a form of it that fits neatly into a privacy paradigm, whereby the details of people's lives are shielded from the prying eyes of the state, the corporation, and various unsavory elements.
	www.wired.com /wired/archive/2.12/emoney.html (757 words)

	Financial cryptography - Wikipedia, the free encyclopedia
		Financial cryptography (FC) is the use of cryptography in applications with strong financial motivation.
		The field found its original inspiration in the work of Dr David Chaum who invented the blinded signature.
		This special form of a cryptographic signature permitted a coin to be signed without the signer seeing the actual coin, and permitted a form of digital token money that offered untraceability.
	en.wikipedia.org /wiki/Financial_cryptography (253 words)

	Who is who @ Mediamatic - David Chaum
		Who is who @ Mediamatic - David Chaum
		David appears on line with us since he presented his stirring cybercash concepts at Doors of Perception 2 @Home, where it (once again) triggered an at times emotional anonymity/privacy debate.
		David Chaum is Managing Director of DigiCash bv in Amsterdam, a firm pioneering electronic cash payment systems, and is chairman of the European Union Research Project CAFE, which is investigating electronic money.
	www.mediamatic.nl /whoiswho/chaum (145 words)

	David Chaum -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-11-07)
		David Chaum is the inventor of many (Click link for more info and facts about cryptographic) cryptographic protocols.
		Chaum is widely recognised as the inventor of (Click link for more info and facts about electronic cash) electronic cash.
		Chaum also founded the (Click link for more info and facts about International Association for Cryptologic Research) International Association for Cryptologic Research (IACR).
	www.absoluteastronomy.com /encyclopedia/d/da/david_chaum.htm (283 words)

	DBLP: David Chaum
		David Chaum, Bert den Boer, Eugène van Heyst, Stig Fr.
		David Chaum, Jan-Hendrik Evertse, Jeroen van de Graaf: An Improved Protocol for Demonstrating Possession of Discrete Logarithms and Some Generalizations.
		David Chaum, Jan-Hendrik Evertse: Crytanalysis of DES with a Reduced Number of Rounds: Sequences of Linear Factors in Block Ciphers.
	www.vldb.org /dblp/db/indices/a-tree/c/Chaum:David.html (628 words)

	Sec w/o ID
		The author is pleased to thank Jan-Hendrik Evertse, Wiebren de Jonge, and Ronald L. Rivest for discussions during the early development of some of the ideas herein presented, as well as everyone who showed interest in and commented on this work.
		Chaum, D. The dining cryptographers problem: Unconditional sender and recipient untraceability.
		Chaum, D. Showing credentials without identification: Transferring signatures between unconditionally unlinkable pseudonyms.
	www.chaum.com /articles/Security_Wthout_Identification.htm (10110 words)

	AnonEquity.org (Site not responding. Last check: 2007-11-07)
		Chaum is a world renowned cryptographer, famous for the development of eCash, an electronic cash application that aims to preserve a user’s anonymity.
		Applied to an online payment transaction, this new protocol assured a bank or merchant that payments were not forged, while also assuring users that information about them and their purchases could not be traced.
		Chaum originally developed SureVote for use in emerging countries where elections are often thrown out after their integrity is called into question.
	anonequity.org /en3/members.bio.php?ID=58 (719 words)

	Fwd: David Chaum speaking at an ITL Seminar Next Week - VOTING!
		David is one of the world's leading cryptographers, with tons of clever inventions, more or less the father of blind signatures and group signatures.
		David Chaum is a pioneer in electronic cash and is also known for proposing cryptographic techniques that allow individuals to protect their identity while securely interacting with others.
		David has over 50 original publications in the area of cryptography and dozens of patents issued and pending.
	cio.nist.gov /esd/emaildir/lists/pki-twg/msg00634.html (663 words)

	CFP 2004 / Computer Freedom & Privacy Conference
		David Culler is a Professor of Computer Science at the University of California, where he has been on the faculty at Berkeley since 1989 and has served as Vice Chair for Industrial Relations and Vice Chair for Computing and Networking.
		David received his B.A. from Berkeley in 1980, M.S. from MIT in 1985 and Ph.D. from MIT in 1989.
		David W. Maher is Chairman of the Board of Public Interest Registry, a nonprofit corporation responsible for management of the registry of the.org top level domain.
	www.cfp2004.org /program/speakers.html (17893 words)

	[No title] (Site not responding. Last check: 2007-11-07)
		Date: Wed, 28 Nov 2001 00:04:46 -0500 I must report that David Chaum, who was to have spoken at CMU this week and had appointments with some of you, came down with a serious case of flu and has not made th trip from California.
		David Chaum is the founder and a member of the Board of Directors of DigiCash Inc., a company that has pioneered electronic cash innovations.
		Chaum is a highly recognized expert in computerized voting.
	www.cs.cmu.edu /~cpsr/events/2001_11_29_voting_technology.txt (374 words)

	Financial Cryptography: Secret Ballot Receipts and Transparent Integrity
		Professor David Chaum is working on the voting problem.
		On the face of it, this is an intractable problem given the requirement of voter secrecy.
		Yet David Chaum is one of the handful of cryptographers who have changed the game - his blinded tokens invention remains one of the half dozen seminal discoveries of the last half-century....
	www.financialcryptography.com /mt/archives/000131.html (603 words)

	Re: Full text of David Chaum's Congressional speech (Site not responding. Last check: 2007-11-07)
		William S. Powell, who holds the patent on the electronic cashwatch and whose patent has been stomped on by numerous and various others because he doesn't have the money to defend it.
		David Chaum's published work was more than 7 years later than the issue date of the Powell patent.
		David's technology notwithstanding, the only way the government can do this is by eliminating the anonymity associated with cash in favor of a fully audited system in which all of the transactions are known to the government.
	cypherpunks.venona.com /date/1995/07/msg00944.html (436 words)

	EFF: Privacy/Online Commerce - Digital Money & Transactions
		David Chaum's August 1992 article from Scientific America describing "blind signature' technology and the possibilities of enhanced digital privacy and electronic cash.
		October 1993 paper attempting to describe Chaum's digital cash in lay terms, and outlining how Chaum avoids the notorious "double-spending" problem.
		Chaum's 1994 paper explaining the technique of prepaid smartcards which contains stored value (in terms of dollars) which a user might exchange with a vendor rather than cumbersome cash.
	www.eff.org /Privacy/Digital_money (544 words)

	Encyclopedia: David Chaum
		Electronic money (or digital money) refers to cash and transactions using electronic means, encompassing the use of computer networks (such as the Internet) and digital stored value systems.
		The International Association for Cryptologic Research (IACR) is a non-profit scientific organization whose purpose is to further research in cryptology and related fields.
		Computer scientists Bruce Schneier Bruce Schneier (born January 15, 1963) is an American cryptographer, computer security expert, and writer.
	www.nationmaster.com /encyclopedia/David-Chaum (284 words)

	Cyphernomicon 12.5: David Chaum's "DigiCash"
		The simplest system I know of that is anonymous is the one by Chaum, Fiat, and Naor, which we have discussed here a few times.
		The idea is that the bank chooses an RSA modulus, and a set of exponents e1, e2, e3,..., where each exponent ei represents a denomination and possibly a date.
		+ Chaum is also centrally invovled in "CAFE," a European committee investigating ways to deploy digital cash in Europe - mostly standards, issues of privacy, etc. - toll roads, ferries, parking meters, etc. - http://digicash.support.nl/ - info@digicash.nl - People have been reporting that their inquiries are not being answered; could be for several reasons.
	www.slimy.com /crypto/cyphernomicon/chapter12/12.5.html (685 words)

	Blind Signature patent expiry party - Jim's blog (Site not responding. Last check: 2007-11-07)
		I got David Chaum's autograph on a plaque of the blind signature patent.
		We did not hear the usual moronic suggestions that we lobby the government to ban badness and make goodness compulsory - those who believed such crap were silenced by the presence of this august company - at least during the discussion led by David Chaum, though they chattered after and before.
		David Chaum is working on voting, party political voting, which of course most of us disagreed with.
	blog.jim.com /?postid=30 (433 words)

	VotersUnite!
		As a graduate student at the University of California at Berkeley in the late 1970s, he wrote the first papers on the topic then moved on to other things.
		Chaum's system, Votegrity, produces a paper trail too except Chaum throws cryptography into the mix, and that changes the equation.
		By letting voters take receipts, Chaum's system would erect formidable hurdles to election fraud while simultaneously, through encryption, preserving the sacrosanct anonymity of the ballot box.
	www.votersunite.org /article.asp?id=2549 (1449 words)

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