As snug--and smug--as OS X’s security may make us feel, your data’s safety is up to you. Smart practices and strong passwords help, but thanks to ubiquitous USB flash drives, cloud file storage, and ever-shrinking MacBooks, it’s easier than ever to share sensitive documents or misplace the drives and computers where they’re kept. That means more opportunities for bad guys to snoop through your important stuff. Knox is a utility that gives you an extra layer of protection from prying eyes by encrypting specific files, folders, or external drives on your Mac. While it’s suited for users who need easy encryption on a daily basis, Knox deserves a look from anyone seeking more flexibility in their daily security regimen.