Therefore with AutoCAD 2016 and newer the ability to encrypt AutoCAD drawings with password protection was removed as is noted in the AutoCAD 2015 Help documentation: About Passwords and Encryption Important: The ability to add a password to a drawing wil

After you click OK, AutoCAD will ask you to enter the password again to confirm. Now save the drawing. To try if the password works, close your drawing. Try to open it again. If you do it right, it will ask you password like below. This protection will pr

How to Password protect AutoCAD drawing View Larger Image Update: With AutoCAD 2016 and later versions the feature of password protecting AutoCAD files has been disabled because it no longer meets the present security standards.