Walking Up a Merkle Tree: SHA-256 Proof Validation in Python
The article discusses how to verify a Merkle proof using SHA-256 in Python. It explains the structure of a Merkle proof and provides a step-by-step guide on how to walk up the Merkle tree to validate the proof. The author also shares code examples for combining hashes and verifying the proof against a file.
- ▪A Merkle proof consists of sibling hashes that allow reconstruction of the path from a file's hash to the Merkle root.
- ▪The order of concatenation in hash combinations is crucial for accurate verification.
- ▪The article includes Python code examples for both combining hashes and verifying a complete Merkle proof.
Opening excerpt (first ~120 words) tap to expand
try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3861408) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } Craig Solomon Posted on May 18 • Originally published at proofledger.io Walking Up a Merkle Tree: SHA-256 Proof Validation in Python #blockchain #insurance #legaltech #evidence You get a file hash and a Merkle proof that claims it's anchored in some blockchain transaction. How do you verify that claim without trusting the service that gave you the proof? I built ProofLedger to create these proofs, but the verification should work independently.
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