No files with prefix com.apple.security in Library?
On my iMac the com.apple.security.plist is located in the Preferences folder in the Local Domain:

    /Library/Preferences


but you were looking in the Preferences folder in the User Domain: 

    ~/Library/Preferences   (aka: /Users/[username]/Library Preferences)


There was no com.apple.security.revocation.plist file in any of the  Preferences folders on my iMac. If one did exist I'd expect it to be in the same Preferences folder as the above plist file.

Check your /Library/Preferences folder for either or both of those plist files.

If you aren't familiar with domains in OS X and how they affect the use of files then you can see Apple's documentation for an overview: About the OS X File System