Adobe acrobat reader 7.0 Manuale Utente

 

You can use the Security panel of the Preferences dialog box to change the appearance of 
your signature, specify a default security method, change validation settings, and specify 
other advanced preferences. (See also 

1.  In the Preferences dialog box, select Security on the left, and then click Advanced 

Preferences.

2.  To require certificates to be checked against a list of excluded certificates during 

validation, select Require That Certificate Revocation Checking Be Done Whenever 
Possible When Verifying Signatures. The Online Certificate Status Protocol (OCSP) and 
the Certificate Revocation List (CRL) are common schemes that maintain security of a 
network server, containing lists of revoked but unexpired certificates. If this option is not 
selected, the revocation status for nonauthor signatures is ignored.

3.  Under Verification Time, select an option to determine whether the time that appears in 

the digital signature reflects the time the signature was validated (Current Time), the time 
set by the default Time Stamp Server specified in the Security Settings, or the time the 
signature was created. 

4.  Click the Windows Integration tab, and do the following:

●     

Specify whether you can import identities from the Windows Certificates feature into the 
list of trusted identities. (See 

.)

●     

Specify whether to trust all root certificates in the Windows Certificates feature when 
validating signatures. Be aware that selecting this option might compromise security.