Definition ∞ A hash based commitment is a cryptographic method where a party commits to a specific value by publishing its cryptographic hash, keeping the original value secret. The commitment is binding because changing the value would alter its hash, and hiding because the hash reveals no information about the original value until it is disclosed. This technique relies on the collision resistance property of hash functions.
Context ∞ Hash based commitments are foundational in various cryptographic protocols, including blockchain transactions, certain zero-knowledge proofs, and secure multi-party computations. They provide a simple yet effective way to ensure data integrity and privacy in decentralized systems. News often references the underlying cryptographic principles that secure blockchain operations, with hash functions being a primary component for data verification and immutability.
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