user27232: Did Satoshi invent the UTXO model (the concept of "unspent transaction outputs" that are spent fully when invoked, leaving new UTXOs and "change"), or was the UTXO model based on prior research or any prior system?

user101191: If you read about Hal Finney's Reusable Proof-of-Work (RPOW), you'll see many similarities to UTXOs. RPOW was a prototype network where individuals created tokens using a similar PoW system to the one Bitcoin uses. These tokens could be signed over to other users (keys), just like bitcoin.

27232: <p>Did Satoshi invent the UTXO model (the concept of &quot;unspent transaction outputs&quot; that are spent fully when invoked, leaving new UTXOs and &quot;change&quot;), or was the UTXO model based on prior research or any prior system?</p>
 101191: <p>If you read about Hal Finney's <a href="https://nakamotoinstitute.org/finney/rpow/index.html" rel="nofollow noreferrer">Reusable Proof-of-Work (RPOW)</a>, you'll see many similarities to UTXOs. RPOW was a prototype network where individuals created tokens using a similar PoW system to the one Bitcoin uses. These tokens could be signed over to other users (keys), just like bitcoin.</p>
