Public Key Cryptosystem (PKC) Bob Alice communication channel encrypt decrypt C=PA(M) M PA SA >M eavesdropper 间题7： 你能香解释一下这个系统的工作原 理？它最明显的好处是什么？ This removes the requirement that the encoding key be kept secretPublic Key Cryptosystem (PKC) This removes the requirement that the encoding key be kept secret