Answered: Encrypt the 4-block message fea1 using…

Encrypt the 4-block message fea1 using the above block cipher in CBC mode with an IV of 6 (0110 in binary). Decrypt the ciphertext db70 using the above cipher in CBC mode with an IV of 6

Management Of Information Security

6th Edition

ISBN:9781337405713

Author:WHITMAN, Michael.

Publisher:WHITMAN, Michael.

Chapter12: Protection Mechanisms

Section: Chapter Questions

Problem 16RQ

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Question

Encrypt and decrypt using the cipher, but in CBC mode. Recall that you can convert hexadecimal digits to binary to do the XOR operation.

1. Encrypt the 4-block message fea1 using the above block cipher in CBC mode with an IV of 6 (0110 in binary).
2. Decrypt the ciphertext db70 using the above cipher in CBC mode with an IV of 6.

Plaintext Ciphertext Plaintext Ciphertext
a
8
e
1
9
d
2
f
a
3
b
7
4
3
5
8
d
b
4
e
7
f
1

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