Security settings and improvements have been introduced in AutoCAD over several releases to help you avoid viruses and malware. The following is a list of the improvements made with each release along with the Help system topics that describe them in more detail.
Service Pack 1 for AutoCAD 2013 includes new security options that help prevent malware and viruses. Details can be found in the following document:
About Digital Signatures for Executable Files - New
CAD Manager Control Utility - Enhanced
DIGITALSIGN (Command) - New
LEGACYCODESEARCH (System Variable) - New
SAFEMODE (System Variable)
/Safemode Startup Switch (link to the Command Line Switch Reference topic)
/Six Startup Switch (link to the Command Line Switch Reference topic) - New
SECURELOAD (System Variable)
SECURITYOPTIONS (Command) - Revised
STARTINFOLDER (System Variable) - New
TRUSTEDDOMAINS (System Variable)
TRUSTEDPATHS (System Variable)
Additional features include control over verifying digitally signed binaries loaded from outside TRUSTEDPATHS, and trusting binaries loaded from outside TRUSTEDPATHS. The list of implicitly trusted folders has been updated.
Several security-related system variables can now be locked with the CAD Manager Control utility: LEGACYCODESEARCH, SECURELOAD, TRUSTEDDOMAINS, and TRUSTEDPATHS.
The Password Protection feature that was added in AutoCAD 2004 using RC4 Encryption was removed because it does not meet contemporary security standards. It is recommended that you use third-party encryption utilities instead.
Any files in the Program Files folder tree that are under the operating system’s UAC protection are now trusted. This trust is indicated by displaying the implicitly trusted paths in Trusted Paths UI and graying them out.