Nick Szabo: the cypherpunk who invented smart contracts

Nick Szabo is one of the most significant figures in the history of digital money — and also one of the least publicly known outside the crypto space. While Satoshi Nakamoto gets credit for launching Bitcoin, Szabo built much of the conceptual foundation that made Bitcoin and everything after it possible.

Smart contracts — 1994

In 1994, Szabo published a paper introducing the concept of "smart contracts" — self-executing agreements written in code that automatically enforce their own terms. He described them as "a set of promises, specified in digital form, including protocols within which the parties perform on these promises."

This was a decade before Ethereum, 15 years before Bitcoin. The concept was ahead of the infrastructure to implement it. When Vitalik Buterin built Ethereum in 2015, he built the platform Szabo had conceptually described in 1994. The term "smart contract" came directly from Szabo's work.

Bit Gold — 1998

In 1998, Szabo designed Bit Gold — a decentralized digital currency with several properties that would later appear in Bitcoin:

• Users solve computational puzzles (proof-of-work) to create new units
• Solutions are timestamped and published to a distributed register
• Each solution references the previous one, creating a chain
• Fixed supply — scarcity built into the design

Bit Gold was never launched — Szabo couldn't solve the double-spend problem without a trusted third party. That was the missing piece Satoshi's blockchain mechanism later provided. Bit Gold remains the closest direct technical predecessor to Bitcoin.

Is Nick Szabo Satoshi Nakamoto?

This is the most persistent theory about Satoshi's identity. The circumstantial evidence is substantial: Szabo had the technical depth, the conceptual history, the cypherpunk background, and the ideological motivation. A linguistic analysis of Bitcoin's whitepaper by researchers at Aston University found Szabo's writing style was the closest match among all proposed candidates.

Szabo has consistently denied being Satoshi. He said in 2014: "I'm afraid you got it wrong doxing me as Satoshi, but I'm used to it." He has never moved any coins that would prove the claim either way.

Whether or not he is Satoshi, the intellectual debt Bitcoin owes to Szabo's work is undeniable.

His ideas about money and property rights

Szabo's writing extends well beyond technical papers. His essays on the history of money, property rights, and the evolution of trust are widely read in the Bitcoin community. His "Shelling Out" essay traces the origins of money to collectibles and proto-money in pre-historic human societies — making the case that the human impulse to store value in scarce, difficult-to-produce objects is ancient and fundamental. Bitcoin, he argues, is the digital realization of that same impulse.