2011

Table Of Contents
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.
Add a Comment and Time Stamp
You can add a comment and time stamp to a digital signature.
Servers are used to obtain the current time when adding a time stamp to a
digital signature. When you send drawing files over the Internet or work on
collaborative projects, you can use a specific server to create an accurate,
consistent time stamp.
Several government operations (such as the National Institute of Standards
and Technology, or the US Naval Observatory) and public systems (such as
California Institute of Technology) offer accurate time values. You can also
use your own server to create a time stamp by modifying the timesrvr.txt file
or creating a custom text file that contains the servers you want to use when
adding a time stamp to a digital signature.
The timesrvr.txt file is located in the programs install directory. By default the
install directory for the program is located at \Program Files\AutoCAD 2011.
To add a new server, open the timesrvr.txt file with a text editor like Notepad
and add the required information for the server. The information that you
need to add to the timesrvr.txt file when you want to added your own server
is a description and the name of the server. The description that is provided
is the value that appears in the drop-down and the name of the server is the
URL (Uniform Resource Locator) to the server. The information for each server
listed in the timesrvr.txt file must be in the following format:
Description (server_name)
For example:
National Institute of Standards and Technology (time.nist.gov)
NOTE Each server that you add needs to be on a separate line in the text file used.
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1934 | Chapter 40 Protect and Sign Drawings