a) Give a ciphertext (encrypted under the same AES

a) Give a ciphertext (encrypted under the same AES key) in which 7:00 has been changed to 8:30 in the plaintext.

The primary theme of the paper is a) Give a ciphertext (encrypted under the same AES key) in which 7:00 has been changed to 8:30 in the plaintext. in which you are required to emphasize its aspects in detail. The cost of the paper starts from $229 and it has been purchased and rated 4.9 points on the scale of 5 points by the students. To gain deeper insights into the paper and achieve fresh information, kindly contact our support.

Questions 1. Altering a text encrypted with an AES key under CBC. [10%]

You are given an encryption of the message below, encrypted with an AES key (which you are not given) using CBC with PKCS5 padding. Advance 5km East with all due speed: 7:00 on 2nd

a) Give a ciphertext (encrypted under the same AES key) in which 7:00 has been changed to 8:30 in the plaintext. [4%]

b)State what other parts of the plaintext will change as a result of the change in (a). [2%]

c) Explain why you cannot use the approach used to solve part(a) to change the word speed to the word haste within the plaintext.

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