digital signature
mathematical scheme for verifying the authenticity of digital documents
AI overview
A digital signature is a mathematical tool that proves a digital document is genuine and hasn't been tampered with, similar to how a handwritten signature verifies a paper document. It matters because it lets people and organizations confirm that files, emails, and online transactions actually come from who they claim to come from.
AI-generated from the Wikipedia summary — may contain errors.
Article
Alice signs a message—"Hello Bob!"—by appending a signature which is computed from the message and her private key.
Bob receives both the message and signature. He uses Alice's public key to verify the authenticity of the signed message.