Definition ∞ A key-value commitment is a cryptographic primitive that allows a party to commit to a set of key-value pairs without revealing them, and later selectively disclose and prove the correctness of specific pairs. This commitment scheme enables efficient verification of data subsets while preserving the privacy of the entire dataset. It is a fundamental building block for various privacy-preserving protocols and verifiable databases. This mechanism offers both data integrity and selective disclosure.
Context ∞ News related to zero-knowledge proofs and confidential transactions often references key-value commitments for their role in enhancing privacy and scalability in blockchain systems. Debates focus on the computational overhead and the security assumptions underlying different commitment schemes. Advancements in this area are critical for developing more private and efficient decentralized applications.
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