David A. Wagner (born 1974) is a

professor Professor (commonly abbreviated as Prof.) is an academic rank at universities and other post-secondary education and research institutions in most countries. Literally, ''professor'' derives from Latin as a "person who professes". Professor ...

computer science Computer science is the study of computation, automation, and information. Computer science spans theoretical disciplines (such as algorithms, theory of computation, information theory, and automation) to practical disciplines (includin ...

at the

University of California, Berkeley The University of California, Berkeley (UC Berkeley, Berkeley, Cal, or California) is a public land-grant research university in Berkeley, California. Established in 1868 as the University of California, it is the state's first land-grant u ...

and a well-known researcher in

cryptography Cryptography, or cryptology (from grc, , translit=kryptós "hidden, secret"; and ''graphein'', "to write", or ''-logia'', "study", respectively), is the practice and study of techniques for secure communication in the presence of adve ...

and

computer security Computer security, cybersecurity (cyber security), or information technology security (IT security) is the protection of computer systems and networks from attack by malicious actors that may result in unauthorized information disclosure, t ...

. He is a member of the

Election Assistance Commission The Election Assistance Commission (EAC) is an independent agency of the United States government created by the Help America Vote Act of 2002 (HAVA). The Commission serves as a national clearinghouse and resource of information regarding elec ...

's Technical Guidelines Development Committee, tasked with assisting the EAC in drafting the Voluntary Voting System Guidelines. He is also a member of the ACCURATE project. Wagner received an A.B. in mathematics from

Princeton University Princeton University is a private research university in Princeton, New Jersey. Founded in 1746 in Elizabeth as the College of New Jersey, Princeton is the fourth-oldest institution of higher education in the United States and one of the n ...

in 1995, an M.S. in

from Berkeley in 1999, and a Ph.D. in computer science from Berkeley in 2000. He has published two books and over 90 peer-reviewed scientific papers. His notable achievements include: * 2007 Served as principal investigator for the source code review and also the documentation review of the historic California state Top-to-Bottom review of electronic voting systems certified for use. Flaws found with vendor-supplied

voting machine A voting machine is a machine used to record votes in an election without paper. The first voting machines were mechanical but it is increasingly more common to use '' electronic voting machines''. Traditionally, a voting machine has been defi ...

s resulted in decertification and provisional recertification by the Secretary of State. * 2001 Cryptanalysis of WEP, the security protocol used in 802.11 "

WiFi Wi-Fi () is a family of wireless network protocols, based on the IEEE 802.11 family of standards, which are commonly used for local area networking of devices and Internet access, allowing nearby digital devices to exchange data by radio wa ...

" networks (with Nikita Borisov and

Ian Goldberg Ian Avrum Goldberg (born March 31, 1973) is a cryptographer and cypherpunk. He is best known for breaking Netscape's implementation of SSL (with David Wagner), and for his role as chief scientist of Radialpoint (formerly Zero Knowledge Sys ...

). * 2000 Cryptanalysis of the

A5/1 A5/1 is a stream cipher used to provide over-the-air communication privacy in the GSM cellular telephone standard. It is one of several implementations of the A5 security protocol. It was initially kept secret, but became public knowledge through l ...

stream cipher stream cipher is a symmetric key cipher where plaintext digits are combined with a pseudorandom cipher digit stream ( keystream). In a stream cipher, each plaintext digit is encrypted one at a time with the corresponding digit of the keystream ...

used in GSM

cellphone A mobile phone, cellular phone, cell phone, cellphone, handphone, hand phone or pocket phone, sometimes shortened to simply mobile, cell, or just phone, is a portable telephone that can make and receive calls over a radio frequency link whi ...

s (with Alex Biryukov and Adi Shamir). * 1999 Cryptanalysis of

Microsoft Microsoft Corporation is an American multinational corporation, multinational technology company, technology corporation producing Software, computer software, consumer electronics, personal computers, and related services headquartered at th ...

PPTP The Point-to-Point Tunneling Protocol (PPTP) is an obsolete method for implementing virtual private networks. PPTP has many well known security issues. PPTP uses a TCP control channel and a Generic Routing Encapsulation tunnel to encapsulate P ...

tunnelling protocol (with

Bruce Schneier Bruce Schneier (; born January 15, 1963) is an American cryptographer, computer security professional, privacy specialist, and writer. Schneier is a Lecturer in Public Policy at the Harvard Kennedy School and a Fellow at the Berkman Klein Ce ...

and " Mudge"). * 1999 Invention of the slide attack, a new form of cryptanalysis (with Alex Biryukov); also the

boomerang attack In cryptography, the boomerang attack is a method for the cryptanalysis of block ciphers based on differential cryptanalysis. The attack was published in 1999 by David Wagner, who used it to break the COCONUT98 cipher. The boomerang attack has ...

and mod n cryptanalysis (the latter with Bruce Schneier and John Kelsey). * 1998 Development of

Twofish In cryptography, Twofish is a symmetric key block cipher with a block size of 128 bits and key sizes up to 256 bits. It was one of the five finalists of the Advanced Encryption Standard contest, but it was not selected for standardization. Two ...

block cipher In cryptography, a block cipher is a deterministic algorithm operating on fixed-length groups of bits, called ''blocks''. Block ciphers are specified cryptographic primitive, elementary components in the design of many cryptographic protocols and ...

, which was a finalist for

NIST The National Institute of Standards and Technology (NIST) is an agency of the United States Department of Commerce whose mission is to promote American innovation and industrial competitiveness. NIST's activities are organized into physical sc ...

's Advanced Encryption Standard competition (with

, John Kelsey,

Doug Whiting Doug is a male personal name (or, depending on which definition of "personal name" one uses, part of a personal name). It is sometimes a given name (or "first name"), but more often it is hypocorism (affectionate variation of a personal name) which ...

, Chris Hall, and

Niels Ferguson Niels T. Ferguson (born 10 December 1965, Eindhoven) is a Dutch cryptographer and consultant who currently works for Microsoft. He has worked with others, including Bruce Schneier, designing cryptographic algorithms, testing algorithms and protoco ...

). * 1997 Cryptanalyzed the CMEA algorithm used in many U.S.

s (with

). * 1995 Discovered a flaw in the implementation of

SSL SSL may refer to: Entertainment * RoboCup Small Size League, robotics football competition * ''Sesame Street Live'', a touring version of the children's television show * StarCraft II StarLeague, a Korean league in the video game Natural language ...

Netscape Navigator Netscape Navigator was a web browser, and the original browser of the Netscape line, from versions 1 to 4.08, and 9.x. It was the flagship product of the Netscape Communications Corp and was the dominant web browser in terms of usage share in ...

(with

).Netscape SSL implementation cracked
news posting to hks.lists.cypherpunks on 18 Sep 1995

References

External links

Professor Wagner's home page

David Wagner election research papers

Some of Wagner's publications
*
->

{{DEFAULTSORT:Wagner, David A. 1974 births Living people Modern cryptographers Princeton University alumni UC Berkeley College of Engineering alumni People associated with computer security UC Berkeley College of Engineering faculty American computer scientists Election technology people