There are very sound technical reasons why this doesn't work. If you send a set of bits to someone on a device they control, they have a copy of that set of bits. Even if you do a bunch of work and make it so that they have to use a device you control to access the message they can still get to it ( the "analog hole"), even if at slightly less than perfect resolution.

And honestly Snapchat for the Enterprise does not sound like a worthwhile endeavor.