From wikipedia:

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. 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 is also known for pioneering the use of ultra-compact code with his 3-line RSA in Perl signature file and non-exportable T-shirts to protest the (now relaxed) United States cryptography export regulations.

Today he is CEO of Blockstream, a company that seeks to further the development of bitcoin and blockchain technology.

Links

• Adam Back on Wikipedia
• @adam3us on Twitter
• Hashcash on Wikipedia
• hashcash.org
• Hashcash white paper - mirror
• Blockstream on Wikipedia
• Blockstream.com
• 03-Feb-2015 Epicenter Bitcoin on Youtube - EB65 – Adam Back & Greg Maxwell: Sidechains Unchained with Gregory Maxwell
• 07-Sep-2015 Epicenter Bitcoin on Youtube - EB95 – Adam Back: Why Bitcoin Needs A Measured Approach To Scaling
• 09-Oct-2016 Kristov Atlas on Youtube - Fungibility Overview by Adam Back and Matt Corallo (Scaling Bitcoin Milan 2016) with Matt Corallo
• 17-Mar-2017 Medium.com - Adam Back and Greg Maxwell aren’t the kings of Bitcoin by Chris Stewart