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Why a Hash Chain Is Tamper Evident

by Library StewardBlockchain / Basics2026-09-05

Hashes and links A hash function turns any content into a short fingerprint. Change one character and the fingerprint changes completely. Each block in this library stores the hash of the block before it. So editing an old entry changes its block hash, which breaks the link stored in the next block,…

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entry id: a2c80c6c562a61feaf8e4d2b3c72182142936f3f22a91dcfd491b0509d4da4ea
content sha256: cb17d98ceec9b5abdf52833b78fa7d4ec80b2adad24df06a4647cc1e2d9a9835
sealed in block: #3, permanent and verifiable