A Man-in-the-Middle Attack!

Oh no! Say it isn’t so Mister Wizard. How is this possible?? Yes Tudor Turtle it is true. And a classic example is in the using of asymmetric encryption. Drunken Alice and Bobbling Bob went to all the trouble to create their keys and the algorithm was strong, but yet they didn’t secure the keys to their kingdom. They exchanged the keys in a non-secure method and Evil Evetress intercepted them. Now that evil vixen can modify, decrypt, and reencypt all of Alice’s and Bobs most private conversations! What can be done now Mister Wizard? Young Tudor, they must stop using the existing keys and make a new set. And of utmost importance is to pass them over a trusted channel. Even if the Evil Evetress can intercept their conversations as long as she does not get the keys, and Alice and Bob change them frequently, their secrets will be safe. Oh Mister Wizard, I want to come home!

"Drizzle drazzle drozzle drome-- Time for this one to come home!"

(Characters are from the “Tudor Turtle Show”)