With FIPS mode disabled, users have three selections of encryption levels:
* Acrobat 6.0 and later compatibility (128-bit RC4)
* Acrobat 7.0 and later compatibility (128-bit AES)
* Acrobat X and later compatibility (256-bit AES)

There is concern amongst our security community that 128-bit RC4 is not a very strong encryption method. We would like to be able to prevent users from choosing this option. It would be helpful if there were a security policy or registry setting that would allow us to hide this encryption selection from all menus.