1. ENCRYPTION
Tutorial: Symmetric Key Cryptography
Cipher Block Chaining (CBC)
Given the binary representation of a plain text message (m), compute for its cipher text using CBC. Assume that the message is processed in blocks of 3 bits, and that the initial random number is equal to 010. Fill‐up the following table with the details of your solution.
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Table representing Ks()
m = 110110110
m(i) r(i) c(i) INFORMATION TO
2. DECRYPTION
Using your answer in Item#1 (information to send), decrypt the message using CBC. Fill‐ up the table with the details of your solution.
Ks(c(i)) m(i)
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