2011

System Variables
SIGWARN
Controls whether a warning is presented when a file with an attached digital
signature is opened.
Utilities
Attach Digital Signatures
Attaches a digital signature to files.
Personally Sign Drawings
When you attach a digital signature to a file, anyone who views the file is
notified if modifications were made after you signed it. Modifications invalidate
a digital signature.
Obtain a Digital ID
To attach a digital signature to a file, you must have a digital ID (certificate),
which is issued by a certificate authority. A digital ID identifies either an
individual or an organization.
A digital ID contains a name, serial number, expiration date, and other
information that certifies the digital signature. From a certificate authority,
you can obtain digital IDs with a security level of Low, Medium, or High.
■ Low. Use a Low security level if you want to sign multiple files quickly. A
digital signature is automatically attached to all file types that are valid for
a digital signature.
■ Medium. Use a Medium security level if you want to be informed when
an application is trying to create a signature with your digital ID. You are
notified each time a digital signature containing your digital ID is attached
to a file.
■ High. Use a High security level if the signature is very sensitive and you
do not want your computer to be misused in the signing of a file. You are
prompted for a password each time you sign a file.
You can set an option to automatically attach your signature to a drawing
whenever you save it. You also can sign many drawings at once, in a batch,
and you can sign transmittal packages of drawings.
1320 | Chapter 35 Protect and Sign Drawings