Crypto Protocol refers to the set of rules and procedures that govern how participants interact in a decentralized blockchain network. These protocols use cryptography to secure transactions and maintain trustless operations, meaning users can transact without intermediaries like banks.

For example, Bitcoin is a crypto protocol based on Proof of Work (PoW), where miners validate transactions by solving complex puzzles. Most crypto protocols are open-source, ensuring transparency and security. They form the foundation of decentralized finance (DeFi), enabling financial systems and applications that rival traditional banking.