Problem 3: Consider the modes of operations covered in Lecture 5 and the following two statements. Let AES-CBC denote th

[answerhappygod]

Problem 3 Consider The Modes Of Operations Covered In Lecture 5 And The Following Two Statements Let Aes Cbc Denote Th 1 (186.59 KiB) Viewed 31 times

Problem 3: Consider the modes of operations covered in Lecture 5 and the following two statements. Let AES-CBC denote the new cipher obtained by using the AES in the CBC mode. (1) The AES-CBC and the AES-CFB with t = 128 have the same encryption and decryption function when the two initial values are the same and the two keys of the AES-CBC and the AES-CFB with t= 128 are the same. (2) The AES-CBC and the AES-OFB with t = 128 have the same encryption and decryption function when the two initial values are the same and the two keys of the AES-CBC and the AES-OFB with t = 128 are the same. 1 Which of the following statements is true? 10 marks (A) Statement (1) is true, but Statement (2) is false. (B) Statement (2) is true, but Statement (1) is false. (C) Both Statements (1) and (2) are true. (D) Both Statements (1) and (2) are false.