Nitro PDF Professional User Guide
Nitro PDF Professional User Guide
Nitro PDF Professional User Guide
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<strong>Nitro</strong> <strong>PDF</strong> <strong>Professional</strong> <strong>User</strong> <strong>Guide</strong><br />
1. On the Secure and Sign tab, in the Digital IDs group, click My Digital IDs .<br />
2. Click Trusted Contacts.<br />
3. Highlight the contact to export, and then click Export.<br />
4. In the Save As dialog, name the certificate and click Save.<br />
To share public key certificates:<br />
1. On the Secure and Sign tab, in the Digital IDs group, click My Digital IDs .<br />
2. Highlight the contact to share with, click Request.<br />
3. Enter your contact details.<br />
4. Click the Include my certificate in email checkbox, and then select the certificate to share.<br />
5. Click Next.<br />
6. Enter the recipient’s email address, and then click Send.<br />
7. Once the information and certificate are moved to your email client, click Send.<br />
11. Digital signatures<br />
A digital signature is like a paper-based signature – each giving you a method for adding a unique identifier<br />
to a document. Both provide you with an easy way to show a person signed a particular document at a<br />
particular time, but a digital signature goes further as it can ensure that the document content has not been<br />
tampered with after it was signed. In addition, the document version history can let recipients see when a<br />
document was signed and see when any changes were made to it. This revision history is encrypted and<br />
stored inside the <strong>PDF</strong> and can be viewed at anytime via the Signatures pane.<br />
To digitally sign a <strong>PDF</strong> document, you must have a digital ID, and to verify other people’s signatures, you<br />
must first share your digital IDs and add each other to your Trusted Contacts list.<br />
· Edit signature fields<br />
· Insert blank signature field<br />
· Customizing signature appearance<br />
· Create a digital ID<br />
· Add people to your Trusted Contacts<br />
11.1 Using digital signatures<br />
Each time a signature is applied to a document, a new message digest is created. This digest stores an<br />
encrypted ‘hash’ version of the document (taken at the time of signing) and then embeds it along with the<br />
signature inside the document. When a recipient receives the file and validates the signature, another digest<br />
is generated and then compared with the original digest to confirm they have remained the same.<br />
Tip: The embedded certificate verifies the signer’s identity, while the message digest verifies<br />
the content has not changed.<br />
To digitally sign a document:<br />
1. On the Secure and Sign ribbon, in the Signatures group, click Sign .<br />
2. One a page, click and drag to place where you would like the signature to appear.<br />
3. In the Apply Digital Signature dialog, select the digital ID to use, and then click Next.<br />
4. Select the reason for signing from the list, or type your own reason for signing.<br />
5. Click the option to save the signed <strong>PDF</strong> as a new file or save it to the current document.<br />
6. Click Finish.<br />
© 2008 <strong>Nitro</strong> <strong>PDF</strong> Software