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What is a digital signature?

A digital signature is a type of electronic signature (e-signature) that verifies the authenticity of a digital document or message. Before digital signatures, you could sign a document and then the document owner could modify or change the document after you signed.

However, with a digital signature, the signature is timestamped and a private key is inserted to the specific document. So if the document changes, your signature will no longer be valid and the document will need to be re-signed.

Types of digital signature software included DocuSign, Hello Sign, AdobeSign, etc. The private key is retained by the signor and anyone else will receive the public key which allows the anyone to review the signed document.

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