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Public-key
ECDSA sign & verify
Generate a real P-256 key pair, sign a message, verify it — then tamper with the message and watch verification reject it.
What's happening under the hood →·Read the Elliptic Curve Cryptography (ECC / ECDSA) module for the full explanation →
1. Generate a key pair
A real P-256 (secp256r1) ECDSA key pair.
2. Sign a message
3. Verify — edit the message, signature, or public key and see what happens