In Figure 31.9 we have a swapper in each round. What is the use of this swapper?
Question:
In Figure 31.9 we have a swapper in each round. What is the use of this swapper?
Figure 31.9
Transcribed Image Text:
64-bit plaintext DES 32 bits 32 bits 41 Initial permutation K1 Round I 48-bit f( R1. K ) K; Round i 56-bit 48-bit cipher key K16 Round 16 48-bit Final permutation 32 bits 32 bits Each round 64-bit ciphertext
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Answer rating: 86% (15 reviews)
DES applies the key and the function fK to only t...View the full answer
Answered By
Anjali Arora
Having the experience of 16 years in providing the best solutions with a proven track record of technical contribution and appreciated for leadership in enhancing team productivity, deliverable quality, and customer satisfaction. Expertise in providing the solution in Computer Science, Management, Accounting, English, Statistics, and Maths.
Also, do website designing and Programming.
Having 7 yrs of Project Management experience.
100% satisfactory answers.
5.00+
3+ Reviews
10+ Question Solved
Related Book For
Question Posted:
Students also viewed these Computer science questions
-
In Figure 31.10 in the text, why do we need an expansion P-box? Why cant we use a straight or a compression P-box? Figure 31.10 In 32 bits Expansion P-box 48 bits XOR 4 - K; (48 bits) [48 bits f(R1....
-
In Figure 10.22, assume we have 100 packets. We have created two sets of packets with high and low resolutions. Each high-resolution packet carries on average 700 bits. Each low-resolution packet...
-
Each round in a block cipher should be invertible to make the whole block invertible. Modern block ciphers use two approaches to achieve this. In the first approach, each component is invertible; in...
-
Considerations that affect the selection of an inventory costing method do not include: (a) tax effects. (b) balance sheet effects. (c) income statement effects. (d) perpetual vs. periodic inventory...
-
There are a number of practical issues when considering how to put a campaign into practice. Discuss at least one method of arriving at expenditure levels for a product of your choice.
-
Income from the mining of mineral deposits usually decreases as the resource becomes more difficult to extract. Determine the future worth in year 10 of a mineral lease that yielded income of $14,000...
-
What are the characteristics of data required to generate knowledge about corporate eco-efficiency?
-
Tower Corp. had the following stock outstanding and Retained Earnings at December 31, 2015: Common Stock (par $ 8; outstanding, 30,000 shares).. $ 240,000 Preferred Stock, 8% (par $ 10; outstanding,...
-
Question #3 (10 marks) 0.25kg of air in a frictionless piston cylinder at 100kPa and 700K is cooled to a final temperature of 22C by heat rejection to the surroundings which are at a temperature of...
-
Frankfurt Clinic is considering investing in new heart-monitoring equipment. It has two options. Option A would have an initial lower cost but would require a significant expenditure for rebuilding...
-
A permutation block (P-box) in a modern block cipher has five inputs and five outputs. This is a _____ permutation? a. Straight b. Compression c. Expansio
-
According to the definitions of stream and block ciphers, find which of the following ciphers is a stream cipher. a. Additive b. Monoalphabetic c. Autokey
-
Sheinhardt Wig Company is considering a project that has the following cash flows: If the appropriate discount rate is 10 percent, what is the projects discounted payback? PROJECT YEAR CASH FLOW...
-
Panama Ltd provides one-day training programs in accounting. It charges $7000 per day. The following events occurred for the company in the month of June 2016. a. Received $30 000 from accounts...
-
Greenfingers Ltd opened a gardening consulting company on 1 August 2016 with each of the two owners contributing $10 000 cash. A one-year bank loan of $40 000 at 12 percent per annum was obtained...
-
Select Harvests Limited is an agricultural company, the core operations of which involve orchard development and, orchard management, as well as supply of almonds to the Australian and overseas...
-
Take the transactions for Hoad Ltd (Problem 3.2 in Chapter 3) and: 1. Prepare journal entries 2. Post to the ledger accounts 3. Prepare a trial balance 4. Prepare closing entries 5. Prepare an income...
-
The accountant for Super Office Supplies Ltd (SOS) is reviewing the year-end unadjusted trial balance and considering the following items of information. For each item, decide if an adjustment to the...
-
a. Distinguish between omnidirectional and dish antennas in terms of operation. b. Under what circumstances would you use an omnidirectional antenna? 6b.) The other wireless device is near but in an...
-
Test your confidence in the following Project Decisions: SI. # Question 01 02 03 04 05 06 07 08 09 10 How many years did it take to construct the largest Egyptian Pyramid- Pyramid of Cheops? When was...
-
State whether each of the following is true or false. If false, explain why. a) toggles auto-hide for a window. b) The toolbar icons represent various menu commands. c) The toolbar contains icons...
-
Fill in the blanks in each of the following statements: a) When an ellipsis button is clicked, a(n)_______ is displayed. b) Using _______help immediately displays a relevant help article. c) GUI is...
-
State whether each of the following is true or false. If false, explain why. a) You can add a control to a Form by double clicking its control icon in the Toolbox. b) The Form, Label and Picture Box...
-
Many complex organizations use parallel career tracks for employees. Give a (short) example of what such a program might look like and describe why an organization might implement such a program. .
-
Technology has been identified as the main factor in the future success of public administration within public service organizations; however, there are some risks and limitations associated with the...
-
4. (25 pt: Dublin Company has a beginning inventory of $60,000 using LIFO. During the third quarter, they sell inventory which cost $120,000, or $22,000 more than they purchased, thus eroding away...
Study smarter with the SolutionInn App