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8. One Time Pad and its cryptanalysis. Answer the following questions and justify your answers (6 points) a. Given a plaintext message m = 10001000
8. One Time Pad and its cryptanalysis. Answer the following questions and justify your answers (6 points) a. Given a plaintext message m = "10001000 00010001" and a key k = 11100001 01010101, what is the resultant ciphertext if One Time Pad is used. b. You observe three ciphertexts all resulting from encryption of ASCII plaintexts containing English letters and spaces only, using the one-time pad and the same key. The 10th byte of the three ciphertexts are OxA8, OxED and OxBD respectively. What is the 10th ASCII character of the third plaintext? C. Consider the one-time pad over the message space of 5-bit strings, where Pr[M=00100) = 0.1 and Pr[M=11011] = 0.9. What is Pr[C=00000]? 8. One Time Pad and its cryptanalysis. Answer the following questions and justify your answers (6 points) a. Given a plaintext message m = "10001000 00010001" and a key k = 11100001 01010101, what is the resultant ciphertext if One Time Pad is used. b. You observe three ciphertexts all resulting from encryption of ASCII plaintexts containing English letters and spaces only, using the one-time pad and the same key. The 10th byte of the three ciphertexts are OxA8, OxED and OxBD respectively. What is the 10th ASCII character of the third plaintext? C. Consider the one-time pad over the message space of 5-bit strings, where Pr[M=00100) = 0.1 and Pr[M=11011] = 0.9. What is Pr[C=00000]
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