Question: 2. (6 Points) We conduct a known-plaintext attack on an LFSR-based stream cipher. We know that the plaintext sent was: 1001 0010 0110 1101 1001

2. (6 Points) We conduct a known-plaintext attack on an LFSR-based stream cipher. We know that the plaintext sent was: 1001 0010 0110 1101 1001 0010 0110 By tapping the channel we observe the following stream (ciphertext): 1011 1100 0011 0001 0010 1011 0001 (a) What is the degree m of the key stream generator? (b) What is the IV (initialization vector)? (c) Determine the feedback coefficients of the LFSR. (d) Draw a circuit diagram and verify the output sequence of the LFSR. Hint: Once you retrieve the key stream, see if you can detect a repeated pattern

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