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3. Encryption Algorithm The encryption algorithm shall consist of two parts: (1) substitution, and (2) encryption on blocks of size 4 x 4 characters. The detailed description of the steps is as follows: a) Preprocessing Remove any punctuation and whitespace characters from the input. o Example: Input Text: ENCRYPT THIS MESSAGE USING THE ALGORITHM DESCRIBED BELOW. Output Text: ENCRYPTTHISMESSAGEUSINGTHEALGORITHMDESCRIBEDBELOW b) Substitution

3. Encryption Algorithm The encryption algorithm shall consist of two parts: (1) substitution, and (2) encryption on blocks of size 4 x 4 characters. The detailed description of the steps is as follows: a) Preprocessing Remove any punctuation and whitespace characters from the input. o Example: Input Text: ENCRYPT THIS MESSAGE USING THE ALGORITHM DESCRIBED BELOW. Output Text: ENCRYPTTHISMESSAGEUSINGTHEALGORITHMDESCRIBEDBELOW b) Substitution

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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in the image below, create the c++ code for each function labeled a through c

Remove any punctuation and whitespace characters from the input. o Example: 3. Encryption Algorithm The encryption algorithm shall consist of two parts: (1) substitution, and (2) encryption on blocks of size 4 x 4 characters. The detailed description of the steps is as follows: a) Preprocessing Input Text: Output Text: ENCRYPTTHISMESSAGEUSINGTHEALGORITHMDESCRIBEDBELOW b) Substitution Perform a polyalphabetic substitution using the Vigenère cipher on the input file with the key provided in the key input file. Example: Key: Input Text: Output Text: WVOGJTXQHUHXICWYYMGHTRKQHQPWKYVGLPYSPWGOINTOFOPMO Example: Input: WVOG JTXQ HUHX ICWY ENCRYPT THIS MESSAGE USING THE ALGORITHM DESCRIBED BELOW YMGH TRKQ HQPW KYVG LPYS PWGO SIMPLEEXAMPLEKEY c) Padding Steps d) - f) are performed on blocks of size 4 x 4 characters formed from the output of step b (i.e., substitution). They are parts of AES and as in any block cipher, the input has to be padded. In this particular case, pad the output from the previous step with A's so that the length of the message is divisible by 16. Page ENCRYPTTHISMESSAGEUSINGTHEALGORITHMDESCRIBEDBELOW Output: WVOG JTXQ HUHX ICWY YMGH TRKQ HQPW KYVG LPYS PWGO hp 2 > o
Transcribed Image Text:Remove any punctuation and whitespace characters from the input. o Example: 3. Encryption Algorithm The encryption algorithm shall consist of two parts: (1) substitution, and (2) encryption on blocks of size 4 x 4 characters. The detailed description of the steps is as follows: a) Preprocessing Input Text: Output Text: ENCRYPTTHISMESSAGEUSINGTHEALGORITHMDESCRIBEDBELOW b) Substitution Perform a polyalphabetic substitution using the Vigenère cipher on the input file with the key provided in the key input file. Example: Key: Input Text: Output Text: WVOGJTXQHUHXICWYYMGHTRKQHQPWKYVGLPYSPWGOINTOFOPMO Example: Input: WVOG JTXQ HUHX ICWY ENCRYPT THIS MESSAGE USING THE ALGORITHM DESCRIBED BELOW YMGH TRKQ HQPW KYVG LPYS PWGO SIMPLEEXAMPLEKEY c) Padding Steps d) - f) are performed on blocks of size 4 x 4 characters formed from the output of step b (i.e., substitution). They are parts of AES and as in any block cipher, the input has to be padded. In this particular case, pad the output from the previous step with A's so that the length of the message is divisible by 16. Page ENCRYPTTHISMESSAGEUSINGTHEALGORITHMDESCRIBEDBELOW Output: WVOG JTXQ HUHX ICWY YMGH TRKQ HQPW KYVG LPYS PWGO hp 2 > o
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