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Nick Szabo

From wikipedia:

Nick Szabo is a computer scientist, legal scholar and cryptographer known for his research in digital contracts and digital currency. He graduated from the University of Washington in 1989 with a degree in computer science. He holds an honorary professorship at the Universidad Francisco Marroquín.

The phrase and concept of "smart contracts" was developed by Szabo with the goal of bringing what he calls the "highly evolved" practices of contract law and practice to the design of electronic commerce protocols between strangers on the Internet. Smart contracts are a major feature of cryptocurrency and the programming language E.

Szabo influentially argued that a minimum granularity of micropayments is set by mental transaction costs.

In 1998, Szabo designed a mechanism for a decentralized digital currency he called "bit gold". Bit gold was never implemented, but has been called "a direct precursor to the Bitcoin architecture."

In Szabo’s bit gold scheme, a participant would dedicate computer power to solving cryptographic puzzles. In a bit gold network, solved puzzles would be sent to the Byzantine fault-tolerant public registry and assigned to the public key of the solver. Each solution would become part of the next challenge, creating a growing chain of new property. This aspect of the system provided a way for the network to verify and time-stamp new coins, because unless a majority of the parties agreed to accept new solutions, they couldn’t start on the next puzzle.

When attempting to design transactions with a digital coin, you run into the "double-spending problem." Once data have been created, reproducing them is a simple matter of copying and pasting. Most digital currencies solve the problem by relinquishing some control to a central authority, which keeps track of each account’s balance. This was an unacceptable solution for Szabo. "I was trying to mimic as closely as possible in cyberspace the security and trust characteristics of gold, and chief among those is that it doesn’t depend on a trusted central authority," he said.

In 2008, a mysterious figure who wrote under the name Satoshi Nakamoto released a proposal for bitcoin. Nakamoto’s true identity remained a secret, which led to speculation about a long list of people suspected to be Nakamoto. Although Szabo has repeatedly denied it, people have speculated that he is Nakamoto.

Research by financial author Dominic Frisby provided circumstantial evidence but, as he admits, no proof that Satoshi is Szabo. Speaking on RT's Keiser Report, he said "I've concluded there is only one person in the whole world that has the sheer breadth but also the specificity of knowledge and it is this chap...". In a July 2014 email to Frisby, Szabo said "Thanks for letting me know. I'm afraid you got it wrong doxing me as Satoshi, but I'm used to it."

Nathaniel Popper wrote in The New York Times that "the most convincing evidence pointed to a reclusive American man of Hungarian descent named Nick Szabo." In 2008, prior to the release of bitcoin, Szabo wrote a comment on his blog about the intent of creating a live version of his hypothetical currency.

In 2015, the subsequent blockchain Ethereum named a subunit of the Ethereum value token the "Szabo".

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