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Problem 4. (20 marks) Let a message M of 128 bits be encrypted with 1.pdf

The document presents a problem involving the encryption of a 128-bit message using AES in cipher feedback (CFB) mode, with a s-value of 32. It asks to draw diagrams for both the encryption and decryption processes. Additionally, it requires identifying the number of output ciphertext blocks produced during encryption.

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Problem 4. (20 marks) Let a message M of 128 bits be encrypted with 128-bit AES using cipher feedback (CFB) mode with s=32. Draw a diagram for both encryption and decryption. Identify the number of output ciphertext blocks in encryption part.

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Problem 4. (20 marks) Let a message M of 128 bits be encrypted with 1.pdf

  • 1.
    Problem 4. (20marks) Let a message M of 128 bits be encrypted with 128-bit AES using cipher feedback (CFB) mode with s=32. Draw a diagram for both encryption and decryption. Identify the number of output ciphertext blocks in encryption part.