Ian Grigg is the inventor of Triple Entry Accounting (TEA), a groundbreaking framework that enhances traditional double-entry bookkeeping by introducing digitally signed receipts as a shared, immutable transaction record. His work revolutionized financial cryptography by providing a tamper-proof, trust-minimized accounting system, making fraud detection and transparent auditing far more effective. Ian is also the creator of the Ricardian Contract, a fundamental innovation in cryptographically secure financial agreements. Since the 1990s, he has been at the forefront of digital finance, advising major blockchain and fintech projects, including EOS, Knabu, Mattereum, and R3. His research continues to shape the evolution of accounting, governance, and decentralized financial systems.