A Serial number PDF is a unique sequence of numbers assigned to the completed users Â» Training and support Â» “How to” documents Â» How to create a serial number
The receiver then decrypts the signature with the public key to verify that it matches the attachment.
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Anybody wishing to check the signature and see the document simply uses the signer's public key to decrypt the document.
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The signer encrypts the document with his private key.