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Cryptography · medium

36. ECDSA Signature Verification

secp256k1 signature verification.

1 min read2 questionsup to 50 XPtopic 36/50

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`secp256k1-recover?` recovers the uncompressed public key from a 32-byte message hash and a 65-byte recoverable signature.

clarity
(secp256k1-recover? msg-hash signature)

How to study this topic

  1. 1. Read the explanation once end to end, skipping the code.
  2. 2. Re-read the code snippets and say out loud what each line does.
  3. 3. Answer the quiz without scrolling back — that is the real check.
  4. 4. Read every explanation, even for the answers you got right.

Scoring

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Check your understanding

  1. 1. What curve is used for Stacks and Bitcoin signatures?

  2. 2. What is returned by secp256k1-recover? on success?

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