Alice and Bob wish to generate a string 1273,... of ones and zeroes that they can...
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Alice and Bob wish to generate a string 1273,... of ones and zeroes that they can use as a key for a one-time pad. They decide to do so in the following way. They initialise ₁ to be 0, ₂ to be 1, 3 to be 1, and ₁ to be 0. Then they define +4 to be x₂ + x₁+2+₁+3 (mod 2) for all i 20. (i) Generate the string ₁,15 (ii) Give a reason why this cryptosystem is not secure. Alice and Bob wish to generate a string 1273,... of ones and zeroes that they can use as a key for a one-time pad. They decide to do so in the following way. They initialise ₁ to be 0, ₂ to be 1, 3 to be 1, and ₁ to be 0. Then they define +4 to be x₂ + x₁+2+₁+3 (mod 2) for all i 20. (i) Generate the string ₁,15 (ii) Give a reason why this cryptosystem is not secure.
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aThe string x1x15 is generated as follows x1 0 x2 1 x3 1 x4 0 x5 1 x6 ... View the full answer
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