David A. Wagner (1974) is an Associate Professor of Computer Science at the University of California, Berkeley and a well-known researcher in cryptography and computer security. He is a member of the Election Assistance Commission's Technical Guidelines Development Committee, tasked with assisting the EAC in drafting the Voluntary Voting System Guidelines. blank">David Wagner biography, from the _National Institute of Standards and Technology

Wagner received an A.B. in Mathematics from Princeton University in 1995, an M.S. in Computer Science 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:

• 1995 Discovered a flaw in the implementation of SSL in Netscape Navigator (with Ian Goldberg) blank">http://www.cs.berkeley.edu/~daw/my-posts/netscape-cracked-0.
• 1997 Cryptanalyzed the CMEA algorithm used in many _U.S. cellphones (with Bruce Schneier).
• 1998 Development of Twofish block cipher as a submission for NIST's AES competition (with Bruce Schneier, John Kelsey, Doug Whiting, Chris Hall, and Niels Ferguson).
• 1999 Invention of the slide attack, a new form of cryptanalysis (with Alex Biryukov); also the boomerang attack and mod n cryptanalysis (the latter with Bruce Schneier and John Kelsey).
• 1999 Cryptanalysis of Microsoft's PPTP tunnelling protocol (with Bruce Schneier and "Mudge").
• 2000 Cryptanalysis of the A5/1 stream cipher used in GSM cellphones (with Alex Biryukov and Adi Shamir).
• 2001 Cryptanalysis of WEP, the security protocol used in 802.11 "WiFi" networks (with Nikita Borisov and Ian Goldberg).

David Wagner (born October 10, 1971) is a U.S / German soccer player born to an American father and a German mother.

Wagner grew up in Germany, playing soccer from a young age. He eventually found himself playing at Schalke 04 with Thomas Dooley, who, like Wagner, had an American father and German mother and grew up in Germany.

On the recommendation of Dooley, Steve Sampson brought Wagner into the US national team in 1996 despite never having never seen him play. Wagner had a U.S. passport, but had played for Germany’s U-18 and U-21 teams. This gave him additional credibility with Sampson but posed a problem as he could be considered ineligible to play for the United States.

In April 1997, after Canada lost to the U.S. in a World Cup qualifying match in which Wagner played, the Canadian Soccer Federation complained to FIFA that Wagner should be ineligible to play for the U.S. based on his appearances for Germany's youth teams. On May 2, 1997, FIFA announced that Wagner was eligible to play for the U.S. because his games with the German teams were exhibitions, not official matches.