sha2, keccak, ed25519-dalek and k256 cover the primitives used on-chain. Prefer audited crates over hand-rolled maths, use constant-time comparison via the subtle crate, and zeroize secret material after use.
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Blockchain · hard
42. Cryptography Crates
Hashes, signatures and constant time.
Check your understanding
1. Which curve library suits Ethereum secp256k1?
2. Comparing secrets should be…