For the remaining questions, consider a 4 bit block cipher, described in hexadecimal by the following table e C a 0 Plaintext Ciphertext Plaintext Ciphertext 8 1 9 d 2 f 6 b 3 5 d b 6 4 9 7 2 f 1 7 3 4 5 8 9 hD 6 6 pts) For this question, you will perform encryption and decryption using the same cipher described above, but in CTR mode a Encrypt the message deal using the above block cipher in CTR mode, with a counter that starts from 0 (Don't use any IV ) b Decrypt the ciphertext 5628 using the above block cipher in CTR mode, with a counter that starts from 0 (Don't use any IV ) c Was this easier or more difficult than encrypting decrypting in CBC mode Do you suspect any difference in security Why or why not For the remaining questions, consider a 4 bit block cipher, described in hexadecimal by the following table e C a 0 Plaintext Ciphertext Plaintext Ciphertext 8 1 9 d 2 f 6 b 3 5 d b 6 4 9 7 2 f 1 7 3 4 5 8 9 hD 6 6 pts) For this question, you will perform encryption and decryption using the same cipher described above, but in CTR mode a Encrypt the message deal using the above block cipher in CTR mode, with a counter that starts from 0 (Don't use any IV ) b Decrypt the ciphertext 5628 using the above block cipher in CTR mode, with a counter that starts from 0 (Don't use any IV ) c Was this easier or more difficult than encrypting decrypting in CBC mode Do you suspect any difference in security Why or why not

Question

For the remaining questions, consider a 4 bit block cipher, described in hexadecimal by the following table  e C a 0 Plaintext Ciphertext Plaintext Ciphertext 8 1 9 d 2 f 6 b 3 5 d b 6 4 9 7 2 f 1 7 3 4 5 8 9 hD 6  6 pts) For this question, you will perform encryption and decryption using the same cipher described above, but in CTR mode  a  Encrypt the message deal using the above block cipher in CTR mode, with a counter that starts from 0  (Don't use any IV ) b  Decrypt the ciphertext 5628 using the above block cipher in CTR mode, with a counter that starts from 0  (Don't use any IV ) c  Was this easier or more difficult than encrypting decrypting in CBC mode  Do you suspect any difference in security  Why or why not  For the remaining questions, consider a 4 bit block cipher, described in hexadecimal by the following table  e C a 0 Plaintext Ciphertext Plaintext Ciphertext 8 1 9 d 2 f 6 b 3 5 d b 6 4 9 7 2 f 1 7 3 4 5 8 9 hD 6  6 pts) For this question, you will perform encryption and decryption using the same cipher described above, but in CTR mode  a  Encrypt the message deal using the above block cipher in CTR mode, with a counter that starts from 0  (Don't use any IV ) b  Decrypt the ciphertext 5628 using the above block cipher in CTR mode, with a counter that starts from 0  (Don't use any IV ) c  Was this easier or more difficult than encrypting decrypting in CBC mode  Do you suspect any difference in security  Why or why not

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Question

For the remaining questions, consider a 4-bit block cipher, described in hexadecimal by the following table: e C a 0 Plaintext Ciphertext Plaintext Ciphertext 8

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