How do you prove you own a private key without ever revealing it to the public network?
Through Digital Signatures (ECDSA).
✒️ Signing & Verification
- Signing: You hash the transaction data ($m$) and use your Private Key ($k$) to produce a signature pair $(r, s)$.
- Verification: Anyone with your Public Key ($K$), the transaction hash ($m$), and signature $(r, s)$ can verify mathematically that the signature was created by the corresponding private key.
This ensures transactions cannot be forged or altered in transit!
🧠 Today's Key Takeaway
- ECDSA signatures prove authorization without exposing private keys.
- Prevents transaction tampering and guarantees non-repudiation.
