She is. Maybe the parent wonders why A, B is not followed by C. E could stand for eavesdropper or just evil.
I believe E stands for Eve stands for "Eves"dropper.
Ha, I never made that connection.
And who is the man in the middle?
Michael.
Oh wait, my apologies, he's the man in the mirror.
Mallory, the malicious man in the middle.
Aw, you beat me to it. I had a meeting to run to and didn't respond. But adding to that there is a whole wiki (of course there is) about this. https://en.wikipedia.org/wiki/Alice_and_Bob