Consider the one-time pad encryption scheme to encrypt a 1-bit message m,
and assume m is chosen with uniform distribution from message space M={0,1}.
Let E1 be the event "message m is = 1" and let E2 be the event
"ciphertext c is = 0". What is the probability that both event E1 and
event E2 happen?
Answer
a.0
b.0.5
c.0.25
d.1