Adam Back

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Adam Back
Born
Adam Back

July 1970 (age 49)
London, England, UK
NationalityBritish
OccupationCryptographer
Known forhashcash, Blockstream
Websitehttp://www.cypherspace.org/adam/

Adam Back (born July 1970) is a British businessman and cryptographer.

Life[edit]

Back was born in London, England, United Kingdom, and he now resides in Sliema, Malta.

He has a computer science Ph.D. from University of Exeter in South West England.

Cryptography software[edit]

In 1997[1], Back invented Hashcash, the proof-of-work system used by several[who?] anti-spam systems.[citation needed] A similar system is used in Bitcoin.[2] Hashcash has also been used in a number of other protocols such as combating blog spam,[3] and defending against user namespace pollution.[4]

He also implemented credlib,[5] a library that implements the credential systems of Stefan Brands and David Chaum.

He was the first to formalize the "Non-Interactive Forward-Secrecy"[6] security property for email and to observe that any Identity Based Encryption scheme can be used to provide Non-Interactive Forward Secrecy.

He is also known for pioneering the use of ultra-compact code with his 3-line RSA in Perl[7] signature file and non-exportable T-shirts[8] to protest cryptography export regulations.

Business career[edit]

Adam is currently the CEO of Blockstream, a technology company that seeks to further the development of bitcoin and blockchain technology.[9] Blockstream provides funding for the development of Bitcoin Core, the predominant Bitcoin network client software.

See also[edit]

References[edit]

  1. ^ Back, Adam. "Hashcash - A Denial of Service Counter-Measure" (PDF). hashcash.org. Retrieved 29 May 2019.
  2. ^ "Bitcoin: A Peer-to-Peer Electronic Cash System" (PDF).
  3. ^ "hashcash.org - blog plugins". hashcash.org.
  4. ^ "I2P's Threat Model". i2p2.de.
  5. ^ "credlib - Credential Library". cypherspace.org.
  6. ^ "Non-Interactive Forward Secrecy". cypherspace.org.
  7. ^ "export-a-crypto-system sig". cypherspace.org.
  8. ^ "Munitions T-shirt". cypherspace.org.
  9. ^ "Blockstream". blockstream.com.

External links[edit]