Digital Signature
Security
Cryptographic proof that a message was authorized by a key holder.
A digital signature proves that a specific account approved a specific message. It uses a private key to sign and a public key to verify. Apps can rely on signatures without ever seeing the private key.
Frequently asked questions
How does a signature verify identity?
Only someone with the private key can produce a valid signature. Others can verify it with the public key.What is message signing used for?
Logging in without passwords, approving actions, or attesting to data, without revealing the private key.Can signatures be forged?
Not with secure algorithms and key handling. Leaks and phishing are the real risks, so protect your keys.