In addition to what Rahul suggests, you can password-protect a file using Adobe Acrobat (choose File > Properties, and click the Security tab). If you don't have Acrobat, please feel free to download a 30-day trial from http://www.adobe.com/products/acrobat.html.
In addition to what Rahul suggests, you can password-protect a file using Adobe Acrobat (choose File > Properties, and click the Security tab). If you don't have Acrobat, please feel free to download a 30-day trial from http://www.adobe.com/products/acrobat.html.