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Advanced information, computation, communication II
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Question 4b
are valid exponents.
Question 4a
are valid exponents.
Question 3c
Show that and find and expression for in terms of . What is the coefficient of in the expression of ?
Question 3b
Is the source stationary?
Question 3a
Calculate the marginal distribution of . What is the value of ?
Question 2
Passing on secrets:Alice has posted her RSA credentials as , with the modulus and the encoding exponent. As required by RSA, she keeps her decoding exponent $d$ preciously secret.Bob has a message , RSA-encrypts it using and passes the resulting cryptogram on to Carlos.Carlos has a message , RSA-encrypts it using to obtain the cryptogram . Then, Carlos multiplies the two cryptograms, and passes this to Alice.Alice applies her regular RSA decryption to Under what condition is the result of this decryption exactly equal to the product ?
Question 1
Consider the group . Find how many elements are in the group.
Question 5
Find all solutions of in the range . How many different solutions are there?Question 4
Find such that .
Question 3.2
Eve can tell for sure if Alice and/or Bob received full points.