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Consider a cryptosystem applies left shift operation, XOR and Initial permutation for encryption. Use the following IP for bit mapping as shown in following Table II. Table II Initial Permutation 58 50 42 34 26 18 10 2 60 52 44 36 28 20 12 4 54 46 38 30 22 | 146 64 56 48 40 32 | 24 16 8 57 49 41 33 25 17 9 159 51 43 35 27 19 11 3 61 53 45 37 29 21 13 5 63 55 47 39 31 23 15 7 Note: The positions of IP follows the row-maior order

Consider a cryptosystem applies left shift operation, XOR and Initial permutation for encryption. Use the following IP for bit mapping as shown in following Table II. Table II Initial Permutation 58 50 42 34 26 18 10 2 60 52 44 36 28 20 12 4 54 46 38 30 22 | 146 64 56 48 40 32 | 24 16 8 57 49 41 33 25 17 9 159 51 43 35 27 19 11 3 61 53 45 37 29 21 13 5 63 55 47 39 31 23 15 7 Note: The positions of IP follows the row-maior order

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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Consider a cryptosystem applies left shift operation, XOR and Initial permutation for encryption. Use the following IP for bit mapping as shown in following Table II. Table II Initial Permutation 58 50 42 34 26 18 10 | 2 60 | 52 | 44 36 28 20 12 | 4 62 54 46 38 30 22 14 6 64 56 48 40 32 24 16 8 49 41 33 25 17 53 45 37 29 21 57 9. 1 59 51 43 35 27 19| 11 3 61 13 5 63 55 47 39 31 23 15 7 Note: The positions of IP follows the row-major order. Input M, is taken as hex code "“A000000100000000" Stage 1: Convert the input into binary (M)2. Stage 2: Then apply XOR using the hex code "0010000100000010". Stage 3: Find the output of the IP. Represent the output of the each stage in Hex code and display in Table III. Table III Stage 1 Output (Hex code) 3
Transcribed Image Text:Consider a cryptosystem applies left shift operation, XOR and Initial permutation for encryption. Use the following IP for bit mapping as shown in following Table II. Table II Initial Permutation 58 50 42 34 26 18 10 | 2 60 | 52 | 44 36 28 20 12 | 4 62 54 46 38 30 22 14 6 64 56 48 40 32 24 16 8 49 41 33 25 17 53 45 37 29 21 57 9. 1 59 51 43 35 27 19| 11 3 61 13 5 63 55 47 39 31 23 15 7 Note: The positions of IP follows the row-major order. Input M, is taken as hex code "“A000000100000000" Stage 1: Convert the input into binary (M)2. Stage 2: Then apply XOR using the hex code "0010000100000010". Stage 3: Find the output of the IP. Represent the output of the each stage in Hex code and display in Table III. Table III Stage 1 Output (Hex code) 3
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