Adam Back
| Adam Back | |
|---|---|
| Born |
Adam Back July 1970 (age 46) London, England, UK |
| Residence | Sliema, Malta |
| Nationality | British |
| Occupation | Cryptographer |
| Known for | hashcash |
| Website | http://www.cypherspace.org/adam/ |
Adam Back (born July 1970) is a British cryptographer and crypto-hacker.
He is the inventor of hashcash, the proof-of-work system used by several anti-spam systems which inspired a similar system in bitcoin. Hashcash has also been used in a number of other protocols such as combating blog spam, and defending against user namespace pollution.
He implemented credlib, a library that implements the credential systems of Stefan Brands and David Chaum.
He was the first to formalize the Non-Interactive Forward-Secrecy 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 Perlsignature file and non-exportable T-shirts to protest the (now relaxed) United States cryptography export regulations.
Today he is President of Blockstream, a company that seeks to further the development of bitcoin and blockchain technology.
He has a computer science Ph.D. from University of Exeter.
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