Here is another scenario from the same author, but a different book:Graham Seymour handed him a new BlackBerry and recited an eight-digit number for the MI6 encryption. Recite the number back to me, hesaid. Keller did. Whatever you do, said Seymour, dont write it down.Why would I do something as foolish as that?What is the maximum possible key length of an eight-digit number like this? Whatis the most probable key length? State any assumptions you must make.