1. In the network of seven nodes shown below, a one-on-one secure communication has to be established between every pair of nodes. That is, A and B have to securely communicate with each other, B and C have to securely communicate with each other, and so on. F A- D B E a. What is the total number of keys required if symmetric key cryptography is used? b. What is the total number of keys required if asymmetric key cryptography is used?
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