Bob is arguing that if you use Electronic Codebook (ECB) mode twice in a row to encrypt a long message, M, using the same key each time, that it will be more secure. Explain why Bob is wrong in the case of using a binary one-time pad encryption scheme

What will be an ideal response?


Xor-ing the message M with the same pad twice will give the same message M
back again if you are using ECB.

Computer Science & Information Technology

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