a. Using a straightforward scheme to store the internal state, how many bits are used? b. Suppose we think of it from the point of view of how much information is represented by the state. In that case, we need to determine how may different states there are, then take the log to the base 2 to find out how many bits of information this represents. Using this approach, how many bits would be needed to represent the state?

Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
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RC4 has a secret internal state which is a permutation of all the possible values of the vector S and the two
indices i and j
a. Using a straightforward scheme to store the internal state, how many bits are used?
b. Suppose we think of it from the point of view of how much information is represented by the state. In
that case, we need to determine how may different states there are, then take the log to the base 2 to
find out how many bits of information this represents. Using this approach, how many bits would be
needed to represent the state?
Transcribed Image Text:RC4 has a secret internal state which is a permutation of all the possible values of the vector S and the two indices i and j a. Using a straightforward scheme to store the internal state, how many bits are used? b. Suppose we think of it from the point of view of how much information is represented by the state. In that case, we need to determine how may different states there are, then take the log to the base 2 to find out how many bits of information this represents. Using this approach, how many bits would be needed to represent the state?
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