Adobe acrobat reader 7.0 User Manual

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Building a list of trusted identities 
You can keep a copy of other users' digital ID certificates in a list of trusted identities. 
Your list of trusted identities is like an address book that stores digital ID certificates. The 
list lets you validate the signatures of these users on any documents you receive.
The preferred method of adding another user's certificate to your list of trusted identities is 
by importing the certificate from an FDF file that the user sends to you. You can also add 
a certificate directly from the PDF document signed by someone who used a self-signed 
digital ID, although this method may not be trustworthy.
To request a certificate from another user:
1.  Choose Document > Trusted Identities. 
2.  Click Request Contact.
3.  Type your name, email address, and contact information. 
4.  To allow other users to add your certificate to their list of trusted identities, select Include 
My Certificates.
5.  Select whether you want to email the request or save it as a file so that you can email it 
later, and then click Next.
6.  Select the digital ID file to use, and then click Select.
7.  Do one of the following:
●     
If the Compose Email dialog box appears, type the email address of the person you are 
requesting a certificate from, and type a subject. Click Email. A new email message 
appears in your default email application with the certificate request attached. Send this 
message in your email application.
●     
If the Export Data As dialog box appears, choose a location for the certificate file in the 
Save In box, type a file name, click Save, and then click OK.
To add a certificate from email to your list of trusted identities:
1.  After a user sends you certificate information, open the email attachment in Adobe 
Reader, and then click Set Contact Trust in the dialog box that appears.
2.  Select trust settings, and then click OK. Click OK again, and then click Close.
To add a certificate from a file to your list of trusted identities:
1.  If you're using the Certificates feature in Windows to organize certificates, select the 
Enable Import And Use Of Identities From The Windows Certificate Store option in the 
Security preferences. Click the Windows Integration tab in the Digital Signatures 
Advanced Preferences, select the desired options, click OK, and then click OK again. (See 
.) 
2.  Choose Document > Trusted Identities. 
3.  Click Add Contacts.
4.  Do any of the following:
●     
If Windows Certificate digital IDs are allowed, select the appropriate directory and group.
●     
If you configured an identity search directory, select the appropriate directory and group. 
You can then search for specific digital ID certificates. (See 
●     
Click Browse, locate the certificate file, and then click Open.
5.  Click Add To Contacts List. 
6.  Select the added certificate in the Contact To Add list, and then click Details. 
7.  In the Certificate Viewer dialog box, note the MD5 Fingerprint and the SHA-1 Fingerprint 
numbers. Confirm with the certificate's originator that the information is correct. If the 
information isn't correct, the certificate shouldn't be trusted. Click OK.
8.  After you verify that the information is correct, select the certificate, click Trust, specify 
trust options, and then click OK. 
To add a certificate using a signature in a PDF document:
1.  Open the PDF document containing the user's self-signed signature.
2.  Click the signature in the document to check whether it's valid.
3.  Click Signature Properties, and then click Show Certificate.
4.  In the Certificate Attributes dialog box, note the MD5 Fingerprint and the SHA-1 
Fingerprint numbers. Confirm with the certificate's originator that the information is 
correct.
5.  After you verify that the certificate information is correct, click Close, click Trust Identity, 
click OK, specify trust options, and then click Import.
To delete a certificate from the list of trusted certificates:
1.  Choose Document > Trusted Identities.
2.  Select the certificate, and click Delete.