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". Professors ...

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 (includi ...

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 adver ...

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's

Technical Guidelines Development Committee The Technical Guidelines Development Committee (TGDC) of the National Institute of Standards and Technology supports the Election Assistance Commission in the United States by providing recommendations on voluntary standards and guidelines related ...

, tasked with assisting the EAC in drafting the Voluntary Voting System Guidelines. He is also a member of the

ACCURATE Accuracy and precision are two measures of '' observational error''. ''Accuracy'' is how close a given set of measurements ( observations or readings) are to their ''true value'', while ''precision'' is how close the measurements are to each ot ...

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 ...

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 IEEE 802.11 is part of the IEEE 802 set of local area network (LAN) technical standards, and specifies the set of media access control (MAC) and physical layer (PHY) protocols for implementing wireless local area network (WLAN) computer com ...

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 Nikita Borisov is a cryptographer and computer security researcher, currently an associate professor at the University of Illinois at Urbana-Champaign (UIUC). His notable work includes one of the first cryptanalyses of the WEP wireless encryptio ...

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 Syste ...

). * 2000 Cryptanalysis of the A5/1 stream cipher used in

GSM The Global System for Mobile Communications (GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation ( 2G) digital cellular networks used by mobile devices such ...

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 Adi Shamir ( he, עדי שמיר; born July 6, 1952) is an Israeli cryptographer. He is a co-inventor of the Rivest–Shamir–Adleman (RSA) algorithm (along with Ron Rivest and Len Adleman), a co-inventor of the Feige–Fiat–Shamir identifi ...

). * 1999 Cryptanalysis of

Microsoft Microsoft Corporation is an American multinational technology corporation producing computer software, consumer electronics, personal computers, and related services headquartered at the Microsoft Redmond campus located in Redmond, Washin ...

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 PP ...

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 Cente ...

and " Mudge"). * 1999 Invention of the

slide attack The slide attack is a form of cryptanalysis designed to deal with the prevailing idea that even weak ciphers can become very strong by increasing the number of rounds, which can ward off a differential attack. The slide attack works in such a way ...

, 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 ...

and

mod n cryptanalysis In cryptography, mod ''n'' cryptanalysis is an attack applicable to block and stream ciphers. It is a form of partitioning cryptanalysis that exploits unevenness in how the cipher operates over equivalence classes (congruence classes) modulo '' ...

(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. T ...

block cipher, which was a finalist for NIST's

Advanced Encryption Standard competition The Advanced Encryption Standard (AES), the symmetric block cipher ratified as a standard by National Institute of Standards and Technology of the United States (NIST), was chosen using a process lasting from 1997 to 2000 that was markedly more ...

(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). * 1997 Cryptanalyzed the CMEA algorithm used in many

U.S. The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...

s (with

). * 1995 Discovered a flaw in the implementation of SSL in

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