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Crypto Class 101 - What is Cryptocurrency?  Wei Dai and b-money, Nick Szabo and Bit Gold, Hal Finney
Crypto Class 101 - What is Cryptocurrency? Wei Dai and b-money, Nick Szabo and Bit Gold, Hal Finney
Published: 2017/05/22
Channel: Crypto Class
Introducing Wei Dai
Introducing Wei Dai
Published: 2016/03/13
Channel: Encounters
Dai Wei on starting his bike sharing start up Ofo and global plans
Dai Wei on starting his bike sharing start up Ofo and global plans
Published: 2017/04/26
Channel: CGTN America
Wei Dai
Wei Dai's Video Abstract, ITA 2013
Published: 2013/02/10
Channel: ITAUCSD
The Legend of Hal Finney
The Legend of Hal Finney
Published: 2014/09/03
Channel: Patrick Likes Bitcoin
Arri SR 16mm by Wei Dai
Arri SR 16mm by Wei Dai
Published: 2017/04/20
Channel: Wei Dai
Dai Wei
Dai Wei's Visual Samples Long Version
Published: 2015/11/30
Channel: Wei Dai
If I
If I'm Lost - Now by Wei Dai
Published: 2014/01/11
Channel: Xin Gao
Thesis Final Presentation of Wei Dai
Thesis Final Presentation of Wei Dai
Published: 2017/03/31
Channel: Dai Wei
GREAT BATTLE!! Jigstyle vs Wei Dai
GREAT BATTLE!! Jigstyle vs Wei Dai
Published: 2013/01/02
Channel: JiGSTYLE Prod.
Die Mayrhofner - Schei-wi-dei-wi-du (HQ)
Die Mayrhofner - Schei-wi-dei-wi-du (HQ)
Published: 2011/03/25
Channel: VolksmusikFan2
BODY TALK 3 Jigsaw VS Wei Dai
BODY TALK 3 Jigsaw VS Wei Dai
Published: 2013/01/04
Channel: SOFLODTV
Where I
Where I'm From by Wei Dai
Published: 2017/02/12
Channel: Wei Dai
DAI Three Pieces for String Quartet
DAI Three Pieces for String Quartet
Published: 2017/11/07
Channel: Curtis Institute of Music
Discovering Satoshi: Dr. Adam Back
Discovering Satoshi: Dr. Adam Back
Published: 2018/05/10
Channel: Crypto Tips
LONDON SCHOOL - Large dimensional data analysis
LONDON SCHOOL - Large dimensional data analysis
Published: 2017/06/09
Channel: SCAVENGE ETN
What Happens to Stocks When Interest Rates Change?
What Happens to Stocks When Interest Rates Change?
Published: 2017/06/26
Channel: Dimensional Fund Advisors
Video Presentation By Wei Dai Shuhang Liu Ningyu Sun
Video Presentation By Wei Dai Shuhang Liu Ningyu Sun
Published: 2016/12/17
Channel: wei Dai
Reading response by Wei Dai(American born chinese )
Reading response by Wei Dai(American born chinese )
Published: 2017/02/05
Channel: Wei Dai
Agravic - Alto Saxophone and tape, by Wei Dai
Agravic - Alto Saxophone and tape, by Wei Dai
Published: 2014/04/04
Channel: Xin Gao
Section 001: Wei, Dai & Jane, Chen
Section 001: Wei, Dai & Jane, Chen
Published: 2017/11/19
Channel: Davee Dai
body talk 3 Wei VS Jigsaw
body talk 3 Wei VS Jigsaw
Published: 2012/12/16
Channel: Wei Dai
Wei Dai JOSHUA SPRAWL
Wei Dai JOSHUA SPRAWL
Published: 2014/11/14
Channel: Wei Dai
Wei Dai Video Resume
Wei Dai Video Resume
Published: 2016/11/08
Channel: jiali guo
Wei Dai - Alchemy
Wei Dai - Alchemy
Published: 2014/07/16
Channel: Fifth House Ensemble
Wei Dai Final Project Video
Wei Dai Final Project Video
Published: 2015/12/23
Channel: wei dai
Final Presentation by Dai Wei
Final Presentation by Dai Wei
Published: 2016/12/19
Channel: Wei Dai
E lucevan le stelle - Tosca - 2015 by by Dai Yuqiang, Wei Song and Warren Mok
E lucevan le stelle - Tosca - 2015 by by Dai Yuqiang, Wei Song and Warren Mok
Published: 2016/10/04
Channel: Opera Hong Kong 香港歌劇院
Thesis project prototype of Wei Dai
Thesis project prototype of Wei Dai
Published: 2017/03/31
Channel: Dai Wei
Andy Hui - Wei Du Ni Shi Bu Ke Qu Dai
Andy Hui - Wei Du Ni Shi Bu Ke Qu Dai
Published: 2010/10/12
Channel: Hombun
Wei Dai
Wei Dai's 2nd song
Published: 2012/02/13
Channel: Bin Gao
Dai Wei
Dai Wei's Visual Samples 15'
Published: 2015/11/29
Channel: Wei Dai
Wei Dai Live Stream
Wei Dai Live Stream
Published: 2017/07/30
Channel: Wei Dai
Dai Wei
Dai Wei's Visual Samples 30'
Published: 2015/11/30
Channel: Wei Dai
Wei Dai Live Stream
Wei Dai Live Stream
Published: 2017/07/24
Channel: Wei Dai
Wei Dai
Wei Dai's fisrt song Hey Guniang
Published: 2012/02/13
Channel: Bin Gao
Binghamton Singing Chinese 2013 - 敖包相会 Muxing Wang,Wei Dai
Binghamton Singing Chinese 2013 - 敖包相会 Muxing Wang,Wei Dai
Published: 2013/12/20
Channel: xyznumber1
Wei Dai - Float with the Wind
Wei Dai - Float with the Wind
Published: 2014/07/16
Channel: Fifth House Ensemble
Wei Dai - Sticky Rice
Wei Dai - Sticky Rice
Published: 2014/07/16
Channel: Fifth House Ensemble
Huang jin shi dai Official US International Trailer (2014) - Wei Tang, Shaofeng Feng HD
Huang jin shi dai Official US International Trailer (2014) - Wei Tang, Shaofeng Feng HD
Published: 2014/10/15
Channel: Cinema Movies
Luke& Wei from Gainesville Poppin Department suddenly want to dance
Luke& Wei from Gainesville Poppin Department suddenly want to dance
Published: 2012/11/02
Channel: Wei Dai
The door. Dai Wei
The door. Dai Wei's Sample
Published: 2015/11/30
Channel: Wei Dai
Overheard by Dai Wei
Overheard by Dai Wei
Published: 2017/03/02
Channel: Wei Dai
Actuality Film by Dai Wei
Actuality Film by Dai Wei
Published: 2017/02/09
Channel: Wei Dai
BILL GATES  NOBODY CAN STOP BITCOIN
BILL GATES NOBODY CAN STOP BITCOIN
Published: 2017/09/28
Channel: francilito tabigue
Founder video-David Dai (Wei)
Founder video-David Dai (Wei)
Published: 2017/08/24
Channel: dai wei
guqin chanson de la cité de Wei by Dai Xiaolian  戴晓莲 古琴曲 阳关三叠
guqin chanson de la cité de Wei by Dai Xiaolian 戴晓莲 古琴曲 阳关三叠
Published: 2010/12/26
Channel: yun tao
Extraordinary CNY Series - Shen Dai Wei
Extraordinary CNY Series - Shen Dai Wei's Violin
Published: 2015/01/26
Channel: Jack Estabrook
Deng Dai Shi Yin Wei You Ai#duet smule
Deng Dai Shi Yin Wei You Ai#duet smule
Published: 2016/06/01
Channel: aloy cung
20170128 - South Daytona Beach, Florida - 5.5 Minute Dai Wei & Troupe Tai Chi Practice Session Video
20170128 - South Daytona Beach, Florida - 5.5 Minute Dai Wei & Troupe Tai Chi Practice Session Video
Published: 2017/01/30
Channel: Chet Karwowski
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WIKIPEDIA ARTICLE

From Wikipedia, the free encyclopedia
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Wei Dai
Alma mater Bachelor of Science degree from the University of Washington in computer science, with a minor in mathematics.
Known for b-money, Crypto++, VMAC
Website www.weidai.com

Wei Dai (Chinese: 戴维[1]) is a computer engineer best known as the creator of the Bitcoin predecessor "b-money" and as the developer of the Crypto++ library.

Education and career[edit]

Mr. Dai graduated from the University of Washington with a degree in computer science[2] and is described as an "intensely private computer engineer".[3] His profile as a member of the advisory board[4] for the (now defunct) VoteHere.net indicated:

"Mr. Dai worked in the Cryptography Research Group at Microsoft Corporation in Redmond, Washington. While at Microsoft, he was involved in the study, design and implementation of cryptosystems for specialized applications. Prior to joining Microsoft, Mr. Dai was a programmer with TerraSciences of Acton, Massachusetts. Mr. Dai holds a Bachelor of Science degree from the University of Washington in computer science, with a minor in mathematics."

Cryptography[edit]

Dai has made numerous contributions to the field of cryptography and has identified critical Cipher Block Chaining (CBC) vulnerabilities affecting SSH2[5] and the browser exploit against SSL/TLS known as BEAST (Browser Exploit Against SSL/TLS).[6][7]

Crypto++[edit]

Crypto++ (also known as CryptoPP, libcrypto++, and libcryptopp) is a free and open source C++ class library of cryptographic algorithms and schemes originally written by Wei Dai. Crypto++ has been widely used in academia, student projects, open source and non-commercial projects, as well as businesses.

VMAC[edit]

VMAC is a block cipher-based message authentication code (MAC) algorithm using a universal hash proposed by Ted Krovetz and Wei Dai in April 2007. The algorithm was designed for high performance backed by a formal analysis.[8]

b-money[edit]

In 1998, Dai helped to spark interest in cryptocurrencies[9] with the publication of "b-money, an anonymous, distributed electronic cash system".[10] In the paper, Dai outlines the basic properties of all modern day cryptocurrency systems: "...a scheme for a group of untraceable digital pseudonyms to pay each other with money and to enforce contracts amongst themselves without outside help".[11]

Influence on the development of Bitcoin[edit]

Described as "money which is impossible to regulate",[12] Dai's b-money described the core concepts later implemented in Bitcoin[13] and other cryptocurrencies:

  • Requires a specified amount of computational work (aka Proof of work).
  • The work done is verified by the community who update a collective ledger book.
  • The worker is awarded funds for their effort.
  • Exchange of funds is accomplished by collective bookkeeping and authenticated with cryptographic hashes.
  • Contracts are enforced through the broadcast and signing of transactions with digital signatures (i.e., public key cryptography).

Relationship with Satoshi Nakamoto[edit]

Wei Dai and Adam Back were the first two people contacted by Satoshi Nakamoto as he was developing Bitcoin in 2008[3] and the b-money paper was referenced in the subsequent Bitcoin whitepaper.[14]

In a May 2011 article, noted cryptographer Nick Szabo states:

Myself, Wei Dai, and Hal Finney were the only people I know of who liked the idea (or in Dai's case his related idea) enough to pursue it to any significant extent until Nakamoto (assuming Nakamoto is not really Finney or Dai).[15]

However Dai questions b-money's influence on Bitcoin:

...my understanding is that the creator of Bitcoin, who goes by the name Satoshi Nakamoto, didn't even read my article before reinventing the idea himself. He learned about it afterward and credited me in his paper. So my connection with the project is quite limited.[16]

There has been much speculation as to the identity of Satoshi Nakamoto, with suspects including Wei Dai, Nick Szabo, Hal Finney and accompanying denials.[17][18][9][19]

External links[edit]

References[edit]

  1. ^ Wei Dai (January 12, 2014). "Wei Dai Answers About His Name in His Blog "Ask any LessWronger anything"". ETA: Since Pinyin is a many to one mapping, and as a result most Chinese articles about Bitcoin put the wrong name down for me, I'll take this opportunity to mention that my name is written logographically as 戴维. 
  2. ^ Morgen E. Peck (May 30, 2012). "Bitcoin: The Cryptoanarchists' Answer to Cash". IEEE Spectrum. 
  3. ^ a b Popper, Nathaniel (May 15, 2015). "Decoding the Enigma of Satoshi Nakamoto and the Birth of Bitcoin". New York Times. Retrieved 31 August 2015. 
  4. ^ Kerry Alexander (April 19, 2000). "B-Money". 
  5. ^ ZiJie, Xu. "Some Fixes To SSH" (PDF). International Association for Cryptologic Research. Retrieved 16 September 2015. 
  6. ^ Goodin, Dan (Sep 21, 2011). "Google preps Chrome fix to slay SSL-attacking BEAST". The Register. Retrieved 16 September 2015. 
  7. ^ Bard, Gregory V. "A Challenging but Feasible Blockwise-Adaptive Chosen-Plaintext Attack on SSL". University of Maryland, Department of Mathematics. Retrieved 16 September 2015. 
  8. ^ Krovetz, Ted; Dai, Wei (2007). "VHASH Security". SiteSeerX. Retrieved 16 September 2015. 
  9. ^ a b Peterson, Andrea (January 3, 2014). "Hal Finney received the first Bitcoin transaction. Here's how he describes it". The Washington Post. Retrieved 16 September 2015. 
  10. ^ Dai, Wei. "B-Money". Archived from the original on |archive-url= requires |archive-date= (help). 
  11. ^ Wei Dai (1998). "B-Money". 
  12. ^ Daniel Cooper (May 8, 2013). "The rise (and rise?) of Bitcoin". Engadget. 
  13. ^ DuPont, Quinn (2014). "The politics of cryptography: Bitcoin and the ordering machines". Journal of Peer Production (1.4). 
  14. ^ Satoshi Nakamoto. "Bitcoin: A Peer-to-Peer Electronic Cash System" (PDF). 
  15. ^ Nick Szabo (2011-05-28). "Bitcoin, what took ye so long?". Unenumerated. Retrieved 2014-03-12. 
  16. ^ Wei Dai. "Wei_Dai comments on Making money with Bitcoin?". 
  17. ^ "Satoshi Nakamoto is (probably) Nick Szabo". LikeInAMirror. WordPress. Archived from the original on 2014-04-13. Retrieved 5 December 2013. 
  18. ^ Weisenthal, Joe (19 May 2013). "Here's The Problem With The New Theory That A Japanese Math Professor Is The Inventor Of Bitcoin". Business Insider. Archived from the original on 2013-11-03. Retrieved 19 May 2013. 
  19. ^ Vigna, Paul (Apr 16, 2014). "Bitcoin Creator 'Satoshi Nakamoto' Unmasked–Again?". Wall Street Journal. Retrieved 16 September 2015. 

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