Changing encryption settings for Microsoft Office 2010/2013

Before I tell you how, let me first repeat the advice from... everywhere... and say don't. Unless you have a really, really good reason, don't change the encryption settings from the default, because it's going to cause you a lot of headaches, and probably not provide much benefit.

Having said that, the encryption behavior in Office is controlled through the registry, so that's where you need to go.

1. You can use the Office Customization Tool.
   • The Office Customization Tool (OCT) reference for Office 2013 is here.
     • The OCT is available only with volume licensed versions of Windows Installer-based Office 2013, Office 2010, and the 2007 Office system.
     • The document you quoted in your question is referencing options in the OCT, so that's probably why you can't find them - they're not configured through any particular Office application.
       
       
2. Download and use the Office 2013 Administrative Template files.
   • The documentation for your available settings and what they do is here.
     
     
3. You can edit the registry.
   • The registry key that controls the Office encryption settings is: HKCU\Software\Policies\Microsoft\Office\14.0\Common\Security
     • It's a REG_SZ data type, and the value should be something like: Microsoft Enhanced RSA and AES Cryptographic Provider,AES 128,128
       • The formatting of the key value is comma separated values for the cryptographic provider, the encryption algorithm and key length.
     • Changes to this key only take effect if you don't have crypto compatibility mode set (HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\\Security\Crypto\CompatMode - a value of 1 means compatibility mode is on, a value of 0 means it's off).