Financial Planning
What is Digital signature?
A digital signature is a mathematical technique used to validate the authenticity and integrity of a digital document, message or software. It’s the digital equivalent of a handwritten signature or stamped seal, but it offers far more inherent security. A digital signature is intended to solve the problem of tampering and impersonation in digital communications.
How do digital signatures work?
If the recipient can’t open the document with the signer’s public key, that indicates there’s a problem with the document or the signature. This is how digital signatures are authenticated.
Digital certificates, also called public key certificates, are used to verify that the public key belongs to the issuer. Digital certificates contain the public key, information about its owner, expiration dates and the digital signature of the certificate’s issuer. Digital certificates are issued by trusted third-party certificate authorities (CAs), such as DocuSign or GlobalSign, for example. The party sending the document and the person signing it must agree to use a given CA.
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