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July 1970 (age 48–49)
London, England, UK
|Known for||hashcash, Blockstream|
In 1997, Back invented Hashcash, the proof-of-work system used by several[who?] anti-spam systems. A similar system is used 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 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.
Adam is currently the CEO of Blockstream, a technology company that seeks to further the development of bitcoin and blockchain technology. Blockstream provides funding for the development of Bitcoin Core, the predominant Bitcoin network client software.
- Back, Adam. "Hashcash - A Denial of Service Counter-Measure" (PDF). hashcash.org. Retrieved 29 May 2019.
- "Bitcoin: A Peer-to-Peer Electronic Cash System" (PDF).
- "hashcash.org - blog plugins". hashcash.org.
- "I2P's Threat Model". i2p2.de.
- "credlib - Credential Library". cypherspace.org.
- "Non-Interactive Forward Secrecy". cypherspace.org.
- "export-a-crypto-system sig". cypherspace.org.
- "Munitions T-shirt". cypherspace.org.
- "Blockstream". blockstream.com.