Some Kweschuns

Assuming that we do manage to invent teleportation, what would happen if there was a man in the middle attack during the process?

And if the teleported packets also take random paths to reach their destination, you know, like data packets on the internet, what if you try to teleport a human and there is data loss on the way? Will he get splinched? Is it how JK Rowling came up with the idea?