Definition ∞ A Sigma Protocol is a class of interactive zero-knowledge proofs that allows one party to demonstrate knowledge of a secret to another party without revealing the secret itself. These protocols involve three steps: commitment, challenge, and response. They provide a verifiable method for proving statements cryptographically, ensuring privacy and security in digital interactions. Sigma protocols are foundational for more complex zero-knowledge proof systems.
Context ∞ Sigma protocols are fundamental building blocks for privacy-enhancing technologies in blockchain and decentralized applications. They are critical for implementing features like confidential transactions and verifiable credentials without exposing underlying data. Developments in these protocols are essential for advancing privacy and scalability solutions in Web3, impacting areas such as identity management and secure computation.
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