Adobe Acrobat 9 PRO Extended - Manual (Page 256)

250 USING ACROBAT 9 PRO EXTENDED
Security
Last updated 9/30/2011
2 Choose Advanced > Security > Adobe LiveCycle Rights Management > Revoke Document.
3 From the menu on the web page, choose an option that explains why you’re revoking the document or type a
message. If you’re replacing the revoked document, type the URL location of the new document.
4 Click OK to save your changes.
Creating or obtaining digital IDs
About digital IDs
Digital IDs include a private key that you safeguard and a public key (certificate) that you share.
A digital ID is like a driver’s license or passport. It proves your identity to people and institutions that you
communicate with electronically. A digital ID usually contains your name and email address, the name of the company
that issued your digital ID, a serial number, and an expiration date.
Digital IDs contain two keys: the public key locks, or encrypts, data; the private key unlocks, or decrypts, that data.
When you sign PDF documents, you use the private key to apply your digital signature. You distribute the certificate
that contains your public key and other identifying information to those who need to validate your signature, verify
your identity, or encrypt information for you. Only your private key can unlock information that was encrypted using
your certificate, so be sure to store your digital ID in a safe place.
You must have a digital ID to sign, certify, and apply certificate encryption to PDFs. You can get a digital ID from a
third-party provider, or you can create a self-signed digital ID. Self-signed digital IDs may be adequate for many
situations. However, to prove your identity in most business transactions, you may need a digital ID from a trusted
third-party provider, called a certificate authority. Because the certificate authority is responsible for verifying your
identity to others, choose one that is trusted by major companies doing business on the Internet. See the Adobe website
for information about Adobe security partners that offer digital IDs and other security solutions.
You can have multiple digital IDs that you use for different purposes, particularly if you sign documents in different
roles or using different certification methods. Digital IDs are usually password protected and can be stored on your
computer in PKCS #12 file format, on a smart card or hardware token, in the Windows certificate store, or on a signing
server (for roaming IDs). Acrobat includes a default signature handler that can access digital IDs from any of these
following locations. (You must register the digital ID in Acrobat for it to be available for use.)