Consider the following mutual authentication and key establishment protocol, which uses a timestamp T and public key cryptography. For each of the following cases, explain whether or not the resulting...

Consider the following mutual authentication and key establishment protocol, which uses a timestamp T and public key cryptography.

For each of the following cases, explain whether or not the resulting protocol provides an effective means for secure mutual authentication and a secure session key K. Ignore replay attacks based solely on the clock skew.

a. Message 1: {[T,Ä"]_Alice}_Bob

b. Message 1

c. Message 1

d. Message 1

e. Message 1

{"Alice", [T^_Alice}_Bob

"Alice", {[T,jq_Alice}_Bob

T, "Alice", {[K]_Alice}_Bob

"Alice", {[TUiicebob and let K = h{T)