Security
What is Digital signature?
A digital signature is a value produced with a private key that can be checked against a corresponding public key and message. It can show that the signer controlled a key for that message; it does not prove that the message is true, safe, authorized by policy, or settled.
Verification must use the exact canonical message, expected algorithm, signer, domain, and freshness rules. Transaction signatures need additional inspection of chain, recipient, value, data, and authorization context before a system treats them as permitted.
Never reveal or log a private signing key. Rotate or revoke credentials according to the protocol if exposure is suspected, and preserve enough audit metadata to identify which public key verified an action.
Related
Definitions are educational and general. Nothing here is financial, legal or tax advice, and regulatory descriptions summarise frameworks that change — check the current rules for your jurisdiction before relying on them.