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Browser-based Merkle tree and inclusion proof demo — build trees up to 16 leaves with real SHA-256, generate O(log n) membership proofs, tamper any leaf and watch the root change, with Git, Bitcoin, and Certificate Transparency walkthroughs. Part of crypto-lab.
A complete C implementation of the Kelsey-Schneier second preimage attack on Merkle-Damgård hash functions using Speck48/96 cipher and Davies-Meyer compression