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((Short description|American cryptographer and security technologist))
((Multiple issues|
((BLP sources|date=October 2023))
((Like resume|date=October 2023))
))
((Infobox scientist
| name                    = Matthew Daniel Green
| image                   = File:Matthew Green.jpeg
| image_size              = 175px
| caption                 = Matthew Green
| birth_place             = [[Hanover, New Hampshire]], United States
| death_date              =
| death_place             = 
| citizenship             = American
| nationality             = 
| ethnicity               = 
| field                   = [[Computer Science]]<br>[[Cryptography]]
| work_institution        = [[Johns Hopkins University]]
| alma_mater              = [[Johns Hopkins University]]<br>[[Oberlin College]]
| doctoral_advisor        = 
| doctoral_students       = 
| known_for               = [[Zerocoin]], Zerocash, TrueCrypt Audit, Sealance
| author_abbreviation_bot = 
| author_abbreviation_zoo = 
| prizes                  = 
| religion                = 
| footnotes               =  
))

'''Matthew Daniel Green''' (born 1976) is an American cryptographer and security technologist. Green is an Associate Professor of Computer Science at the [[Johns Hopkins University|Johns Hopkins]] Information Security Institute. He specializes in applied cryptography, privacy-enhanced information storage systems, anonymous [[cryptocurrency|cryptocurrencies]], elliptic curve crypto-systems, and satellite television piracy. He is a member of the teams that developed the [[Zerocoin]] anonymous [[cryptocurrency]]<ref>((cite book|url=http://spar.isi.jhu.edu/~mgreen/ZerocoinOakland.pdf| chapter=Zerocoin: Anonymous Distributed E-Cash from Bitcoin|publisher=IEEE Computer Society Conference Publishing Services | date=May 2013 | pages=397–411 | doi=10.1109/SP.2013.34 | issn=1081-6011 | title=2013 IEEE Symposium on Security and Privacy | last1=Miers | first1=I. | last2=Garman | first2=C. | last3=Green | first3=M. | last4=Rubin | first4=A. D. | isbn=978-0-7695-4977-4 | s2cid=9194314 ))</ref> and Zerocash.<ref>((cite web|url=http://zerocash-project.org/media/pdf/zerocash-oakland2014.pdf |title=Zerocash: Decentralized Anonymous Payments from Bitcoin |website=Zerocash-project.org |access-date=2016-05-13))</ref>  He has also been influential in the development of the [[Zcash]] system. He has been involved in the groups that exposed vulnerabilities in [[RSA BSAFE]],<ref>((cite web|url=http://dualec.org/DualECTLS.pdf |title=On the Practical Exploitability of Dual EC in TLS Implementations |website=Dualec.org |access-date=2016-05-13))</ref> [[Speedpass]] and [[E-ZPass]].<ref>((cite news|url=https://www.nytimes.com/2005/01/29/national/29key.html|title=Graduate Cryptographers Unlock Code of 'Thiefproof' Car Key|newspaper=[[The New York Times]]|date=29 January 2005 |access-date=2016-05-13 |last1=Schwartz |first1=John ))</ref>
Green lives in Baltimore, MD with his wife, Melissa, 2 children and 2 miniature dachshunds.

==Education==
Green received a B.S. from [[Oberlin College]] (Computer Science), a B.M. from [[Oberlin College]] (Electronic Music), a Master's from [[Johns Hopkins University]] (Computer Science), and a PhD from [[Johns Hopkins University]] (Computer Science). His dissertation was titled "Cryptography for Secure and Private Databases: Enabling Practical Data Access without Compromising Privacy".

==Blog==
Green is the author of the blog, "A Few Thoughts on Cryptographic Engineering". In September 2013, a blog post by Green summarizing and speculating on [[National Security Agency|NSA]]'s programs to weaken cryptography, titled "On the NSA", was controversially taken down by Green's academic dean at Johns Hopkins for "contain[ing] a link or links to classified material and also [using] the NSA logo".<ref>((cite web|author=Nate Anderson |url=https://arstechnica.com/security/2013/09/crypto-prof-asked-to-remove-nsa-related-blog-post/ |title=Crypto prof asked to remove NSA-related blog post |publisher=Ars Technica |date=2013-09-09 |access-date=2016-05-13))</ref> As [[Ars Technica]] notes, this was "a strange request on its face", as this use of the NSA logo by Green was not "reasonably calculated to convey the impression that such use is approved, endorsed, or authorized by the National Security Agency", and linking classified information published by news organizations is legally entirely uncontroversial. The university later apologized to Green, and the blog post was restored (sans NSA logo), with a Johns Hopkins spokesman saying that "I'm not saying that there was a great deal of legal analysis done" as explanation for the legally unmotivated takedown.<ref>((cite web|author=Nate Anderson |url=https://arstechnica.com/security/2013/09/university-apologizes-for-censoring-crypto-prof-over-anti-nsa-post/ |title=University apologizes for censoring crypto prof over anti-NSA post |publisher=Ars Technica |date=2013-09-10 |access-date=2016-05-13))</ref>

In addition to general blog posts about NSA, encryption, and security, Green's blog entries on NSA's backdoor in [[Dual_EC_DRBG]], and [[RSA Security]]'s usage of the backdoored [[cryptographically secure pseudorandom number generator]] (CSPRNG), have been widely cited in the mainstream news media.<ref>((cite web|author=Fink, Erica |url=https://money.cnn.com/video/technology/2013/06/07/t-prism-what-nsa-could-know-about-you.cnnmoney/ |title=Prism: What the NSA could know about you - Video - Technology |website=Money.cnn.com |date=2013-06-07 |access-date=2016-05-13))</ref><ref>((cite news|url=https://www.nytimes.com/2013/09/06/us/nsa-foils-much-internet-encryption.html?pagewanted=all|title=.S.A. Able to Foil Basic Safeguards of Privacy on Web|newspaper=[[The New York Times]]|date=5 September 2013 |access-date=2016-05-13 |last1=Perlroth |first1=Nicole |last2=Larson |first2=Jeff |last3=Shane |first3=Scott ))</ref><ref>((cite news|url=http://www.newyorker.com/tech/elements/how-the-n-s-a-cracked-the-web |title=How the N.S.A. Cracked the Web |newspaper=[[The New Yorker]] |date=2013-09-06 |access-date=2016-05-13))</ref><ref>((cite web|author= |url=https://www.wired.com/2014/02/gotofail/ |title=Behind iPhone's Critical Security Bug, a Single Bad 'Goto' |publisher=WIRED |date=2014-02-22 |access-date=2016-05-13))</ref><ref>((cite web|author=Joshua Brustein |url=http://www.businessweek.com/articles/2014-04-09/why-heartbleed-the-latest-cybersecurity-scare-matters |archive-url=https://web.archive.org/web/20140409184906/http://www.businessweek.com/articles/2014-04-09/why-heartbleed-the-latest-cybersecurity-scare-matters |url-status=dead |archive-date=April 9, 2014 |title=Why Heartbleed, the Latest Cybersecurity Scare, Matters - Bloomberg |website=Businessweek.com |date=2014-04-09 |access-date=2016-05-13))</ref>

==Work==
Green currently holds the position of Associate Professor at the Johns Hopkins Information Security Institute. He teaches courses pertaining to practical cryptography.

Green is part of the group which developed [[Zerocoin]], an anonymous [[cryptocurrency]] protocol.<ref>((cite web|author= |url=http://articles.baltimoresun.com/2014-02-01/news/bs-md-hopkins-bitcoin-20140201_1_virtual-currencies-bitcoin-foundation-ross-william-ulbricht |title=Hopkins researchers are creating an alternative to Bitcoin - tribunedigital-baltimoresun |website=Articles.baltimoresun.com |date=2014-02-01 |access-date=2016-05-13))</ref><ref>((cite web|author= |url=https://www.forbes.com/sites/andygreenberg/2014/01/13/bitcoin-anonymity-upgrade-zerocoin-to-become-its-own-cryptocurrency/ |title=Bitcoin Anonymity Upgrade Zerocoin To Become An Independent Cryptocurrency |website=Forbes.com |date= |access-date=2016-05-13))</ref><ref>((cite news|url=http://bits.blogs.nytimes.com/2013/11/18/researchers-work-to-add-more-anonymity-to-bitcoin/|title=Researchers Work to Add More Anonymity to Bitcoin|newspaper=[[The New York Times]]|date=19 November 2013 |access-date=2016-05-13))</ref><ref>((cite web|last=Peck |first=Morgen E. |url=https://spectrum.ieee.org/computing/networks/whos-who-in-bitcoin-zerocoin-hero-matthew-green/ |title=Who's Who in Bitcoin: Zerocoin Hero Matthew Green - IEEE Spectrum |website=Spectrum.ieee.org |date=2013-10-24 |access-date=2016-05-13))</ref><ref>((cite web|author= |url=https://www.forbes.com/sites/andygreenberg/2013/04/12/zerocoin-add-on-for-bitcoin-could-make-it-truly-anonymous-and-untraceable/ |title='Zerocoin' Add-on For Bitcoin Could Make It Truly Anonymous And Untraceable |website=Forbes.com |date= |access-date=2016-05-13))</ref> Zerocoin is a proposed extension to the [[Bitcoin network|Bitcoin protocol]] that would add [[anonymity]] to [[Bitcoin]] transactions. Zerocoin provides anonymity by the introduction of a separate ''zerocoin'' cryptocurrency that is stored in the Bitcoin block chain. Though originally proposed for use with the Bitcoin network, zerocoin could be integrated into any [[cryptocurrency]]. His research team has exposed flaws in more than one third of  [[Transport Layer Security|SSL/TLS]] encrypted web sites as well as vulnerabilities in encryption technologies, including [[RSA BSAFE]], Exxon/Mobil [[Speedpass]], [[E-ZPass]], and automotive security systems. In 2015, Green was a member of the research team that identified the [[Logjam (computer security)|Logjam]] vulnerability in the TLS protocol.

Green started his career in 1999 at [[AT&T Laboratories]] in Florham Park, New Jersey. At AT&T Labs he worked on a variety of projects including audio coding/secure content distribution, streaming video and wireless localization services. As a graduate student he co-founded Independent Security Evaluators (ISE) with two fellow students and Avi Rubin in 2005. Green served as CTO of ISE until his departure in 2011. He also co-founded Security Companies: Zeutro and Sealance.

Green is a member of the technical advisory board for the Linux Foundation Core Infrastructure Initiative, formed to address critical Internet security concerns in the wake of  the [[Heartbleed]] security bug disclosed in April 2014 in the [[OpenSSL]] cryptography library. He sits on the technical advisory boards for [[CipherCloud]], Overnest and Mozilla Cybersecurity Delphi. Green co-founded and serves on the Board for Directors of the Open Crypto Audit Project (OCAP), which undertook a [[security audit]] of the [[TrueCrypt]] software.<ref name=OCAPPeople>((cite web|title=Technical Advisory Board|url=http://opencryptoaudit.org/people|work=Open Crypto Audit Project|access-date=30 May 2014))</ref><ref name=ITCAY>((cite web|last=White|first=Kenneth|title=Is TrueCrypt Audited Yet?|url=http://istruecryptauditedyet.com/|website=Istruecryptaudiedyet.com|access-date=30 May 2014|author2=Green, Matthew))</ref>

== See also ==

* [[Crypto naming controversy]]

==References==
((Reflist|30em))

==External links==
* [http://spar.isi.jhu.edu/~mgreen Matthew D. Green]((snd)) his personal page at Johns Hopkins University
* [https://blog.cryptographyengineering.com/ A Few Thoughts on Cryptographic Engineering]((snd)) his personal crypto blog
* [http://cryptoengineers.com/ CE' website]((snd)) his company page

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[[Category:1976 births]]
[[Category:Living people]]
[[Category:Oberlin College alumni]]
[[Category:Johns Hopkins University alumni]]
[[Category:Johns Hopkins University faculty]]
[[Category:Modern cryptographers]]
[[Category:InfoSec Twitter]]

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