The standard DES algorithm has 16 rounds to come up with an encrypted message. In this...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
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 EOBE6E662267 (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. 32 bits LI-1 Mixer Swapper r(RJ-11) LI 32 bits 32 bits R1-1 Each round RI 32 bits 64-bit plaintext Initial permutation Round 11 Round 2 : Round 16 Final permutation 64-bit ciphertext K 48-bit K 48-bit K16 48-bit IP 585042 34 26 18102 60 5244 36 28 20 124 62 5446 3830 22 146 64 564840 32 24 168 574941 33 25 17 91 595143352719113 61 53 45 37 29 21 135 63 55473931 23 157 DES Round-key generator 56-bit cipher key What to be submitted and included in the lab report for this question: The following steps are illustrated in more details to come up with the plaintext, Step 1: Show the result after the original 64-bit plaintext is re-ordered by the table IP (initial permutation), in which IP is illustrated below: 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 EOBE6E662267 (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. 32 bits LI-1 Mixer Swapper r(RJ-11) LI 32 bits 32 bits R1-1 Each round RI 32 bits 64-bit plaintext Initial permutation Round 11 Round 2 : Round 16 Final permutation 64-bit ciphertext K 48-bit K 48-bit K16 48-bit IP 585042 34 26 18102 60 5244 36 28 20 124 62 5446 3830 22 146 64 564840 32 24 168 574941 33 25 17 91 595143352719113 61 53 45 37 29 21 135 63 55473931 23 157 DES Round-key generator 56-bit cipher key What to be submitted and included in the lab report for this question: The following steps are illustrated in more details to come up with the plaintext, Step 1: Show the result after the original 64-bit plaintext is re-ordered by the table IP (initial permutation), in which IP is illustrated below:
Expert Answer:
Answer rating: 100% (QA)
Solutions Step 1 To decrypt the given ciphertext with the provided DES key in a single round you can ... View the full answer
Related Book For
Modern Systems Analysis And Design
ISBN: 9780134204925
8th Edition
Authors: Joseph Valacich, Joey George
Posted Date:
Students also viewed these programming questions
-
Solve the recurrence a n = n a n 1 + n ! a n = na n 1 + n ! for n > 0 n > 0 with a 0 = 1 a 0 = 1 . Give a simple expression for a n a n .
-
Planning is one of the most important management functions in any business. A front office managers first step in planning should involve determine the departments goals. Planning also includes...
-
Natureview Farm It was a crisp Vermont morning in February 2000. Christine Walker, vice president of marketing for Natureview Farm, Inc., a small yogurt manufacturer, paused to collect her thoughts...
-
A particle of mass m moves along the x-axis under a force F = ??m?2x. The amplitude is b. Show that the period is given by 4. T= dx, (11.83) where (11.84) Y =1+ 2c2 (2-2).
-
A large rocket engine delivers hydrogen at 1500C and 3 MPa, k = 1.41, R = 4124 J/kgK, to a nozzle which exits with gas pressure equal to the ambient pressure of 54 kPa. Assuming isentropic flow, if...
-
Twelve points are placed on the circumference of a circle and all the chords connecting these points are drawn. What is the largest number of points of intersection for these chords?
-
The engine is working on ideal Otto cycle. The temperature at the beginning and at the end of compression is \(60^{\circ} \mathrm{C}\) and \(400^{\circ} \mathrm{C}\). Calculate the air standard...
-
Oakwood Hospital is considering using ABC analysis to classify laboratory SKUs into three categories: those that will be delivered daily from their supplier (Class A items), those that will be...
-
Some managers argue that international joint ventures/alliances are more costly than beneficial in terms of problems, making these ventures almost doomed to failure before beginning. Do you agree...
-
Assuming Jay and JoAnn have this same business that they run as a partnership, prepare their joint Federal income tax return for 2022. Attached is the copy of the partnership K-1 for each of them....
-
Which of the following is LEAST likely to be a health problem for someone with cystic fibrosis O frequent infections O diabetes O obesity Onutritional deficiencies Submit Part B Request Answer The...
-
AllRoutes Ltd. and SpeedyWay Ltd. entered a strategic alliance five years ago to save on delivery charges related to cross-border transport. In the first four years, both companies enjoyed profits...
-
Morning Dove Company manufactures one model of birdbath, which is very popular. Morning Dove sells all units it produces each month. The relevant range is 0 to 1,600 units, and monthly production...
-
Periodic inventory by three methods; cost of goods sold The units of an item available for sale during the year were as follows: Jan. 1 Mar. 10 Inventory Purchase 40 units at $130 60 units at $140...
-
Adam Cook formed Great Cookies, LLC as a single-member LLC in 2019. The company uses the calendar year as deadline for Adam to File Form 2553 to make this election? December 31, 2022. March 15, 2023....
-
A paper company needs to ship paper to a large printing business. The paper will be shipped in small boxes and large boxes. The volume of each small box is 6 cubic feet and the volume of each large...
-
Evaluate the analysis they have performed on the deal structure. What principles should guide the structuring of the deal used to raise equity capital? What specific deal structure and terms for...
-
Does log 81 (2401) = log 3 (7)? Verify the claim algebraically.
-
Briefly describe the role of a content management system and its benefits.
-
Convert the class diagram in Figure 8-37 to the equivalent E-R diagram. Compare the two diagrams. Describe what different system specifications are shown in each diagram. Figure 8-37
-
Reexamine the data you collected in the interview in Field Exercise 1. This time, analyze the data from a political perspective. How well does the political model explain how the organization dealt...
-
For the attached flows over slender delta wings, show that at low angles of attack Eqs. 1.11 and 1.33 are identical. Eq 1.11 Eq 1.13 = 1 2 AR CL=
-
The ellipsoid given in Problem 2.3 is also undergoing a pulsative major axis change with the same period but with phase difference \(\phi\). Express the equation of surfaces. Problem 2.3 An oblate...
-
Express the components of stress tensor in generalized coordinates in terms ofvelocity gradients.
Study smarter with the SolutionInn App