William "Will" Entriken (/ˈɛn.trə.kɪn/) also known by the online monikerFulldecent, is a solutions architect, cybersecurity specialist, financial analyst, general manager, and civic hacker best known for his contributions in blockchain technology and open sourced solutions. He is recognized as the lead author of the landmark Ethereum paper ERC-721: Non-Fungible Token Standard,[1] published in 2018. This paper is recognized for pioneering the foundation of the digital collectibles eco-system by establishing a programming standard called "ERC-721" to create NFTs (a type of digital "deed" to prove ownership of assets) via smart contracts on Ethereum.[2] It also first formalized and defined the term Non-Fungible Token (NFT) into blockchain nomenclature[3] which was made popular by the blockchain game CryptoKitties; the CTO of that game, Dieter Shirley, is also a fellow co-author of the published paper.[4]
His contributions as a civic hacker local to his community in Philadelphia has earned him recognition including from an open source project supporting the SEPTA train system.[5] As a cybersecurity professional, he has actively collaborated with Apple, FINRA, SEC and the FBI and currently holds an active Department of Defense Security Clearance.[6]