He was the first to describe the "non-interactive forward secrecy"[12][13][14] security property for email and to observe that any
identity-based encryption scheme can be used to provide non-interactive forward secrecy.
Back was one of the first two people to receive an email from
Satoshi Nakamoto.[22][2] In 2016, the Financial Times cited Back as a potential Nakamoto candidate, along with
Nick Szabo and
Hal Finney.[23]Craig Wright had sued Back for stating that Wright was not Nakamoto, with Wright subsequently dropping the suit.[2]
Back has promoted the use of satellites and mesh networks to broadcast and receive bitcoin transactions, as a backup for the traditional internet.[24]
Business career
On 3 October 2016, Back was appointed as CEO of
Blockstream.[25] Since then he has introduced products such as the Liquid sidechain, Blockstream Mining Notes, mining colocation services, the Jade hardware wallet, and the Core Lightning implementation.
^Narayanan, Arvind; Bonneau, Joseph; Felten, Edward; Miller, Andrew; Goldfeder, Steven (2016). Bitcoin and Cryptocurrency Technologies: A Comprehensive Introduction. Princeton and Oxford: Princeton University Press.
ISBN978-0-691-17169-2.
^Judmayer, Aljosha; Stifter, Nicholas (2017).
"Before bitcoin". Blocks and Chains: Introduction to Bitcoin, Cryptocurrencies, and Their Consensus Mechanisms (Synthesis Lectures on Information Security, Privacy, and Tru). Morgan & Claypool Publishers. p. 17.
ISBN9781627057165.
^Blanchette, Jean-François (2012).
"On the brink of revolution". Burdens of Proof: Cryptographic Culture and Evidence Law in the Age of Electronic Documents. MIT Press. p. 50.
ISBN978-0262017510.
^Brunton, Finn (2019).
"On the brink of revolution". Digital Cash: The Unknown History of the Anarchists, Utopians, and Technologists Who Created Cryptocurrency. Princeton Press. p. 97.
ISBN9780691179490.