Steps 1 has been solved . Need a continuos on to Steps 2 -Steps 3.2. W Symmetric-key

Steps 1 has been solved . Need a continuos on to Steps 2 -Steps 3.2.

  
 
 
 
 
 
 
 

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W Symmetric-key ciphers: DES decryption (100 points) The second lab is all about traditional and modern symmetric-key ciphers. Please read the lecture notes on traditional symmetric-key ciphers, modern symmetric- key ciphers and DES, and then complete the following lab question. The standard DES algorithm has 16 rounds to come up with an encrypted message. In this lab, we just suppose the DES has only one round with the round 48-bit key E0BE6E662267 (note here the key is 48 bits long instead of 64 bits because we actually skip the step of key generation and just assume we already got the round key). Given the cipher text 266E2A7732713036, what is its plaintext using the key EOBE6E662267 with one round? The standard DES encryption procedure is briefly summarized in figure 1 below and one of the most significant features for standard DES algorithm is that both encryption and decryption follow the same procedure. The only different is the key in decryption is from K16 to K1 from round 1 to round 16. W Symmetric-key ciphers: DES decryption (100 points) The second lab is all about traditional and modern symmetric-key ciphers. Please read the lecture notes on traditional symmetric-key ciphers, modern symmetric- key ciphers and DES, and then complete the following lab question. The standard DES algorithm has 16 rounds to come up with an encrypted message. In this lab, we just suppose the DES has only one round with the round 48-bit key E0BE6E662267 (note here the key is 48 bits long instead of 64 bits because we actually skip the step of key generation and just assume we already got the round key). Given the cipher text 266E2A7732713036, what is its plaintext using the key EOBE6E662267 with one round? The standard DES encryption procedure is briefly summarized in figure 1 below and one of the most significant features for standard DES algorithm is that both encryption and decryption follow the same procedure. The only different is the key in decryption is from K16 to K1 from round 1 to round 16.