91Ó°ÊÓ

Consider Kerckhoffs' principle. Provide at least two arguments in favor of Kerckhoffs' principle and at least two arguments against Kerckhoffs' principle. Thenstate and argue your view of the validity of Kerckhoffs' principle.

Consider a group of 30 people who wish to establish pair-wise secure communications using symmetric-key cryptography. How many keys need to be exchanged in total?