In each round of DES, we have all components defined in Figure 31.8 in the text. Which
Question:
In each round of DES, we have all components defined in Figure 31.8 in the text. Which components use a key and which components do not?
Figure 31.8
Transcribed Image Text:
4 2. 3. Straight permutation Compression permutation Expansion permutation Transposition n bits n bits b7|b6 bs|b4|b3|b2|b1|bo ... A predefined Key (n bits) function Shift left (3 bits) bab3 b2b bolb7 b6 b5 m bits n bits Substitution Exclusive-OR Shift b7 b6 bs b4 b3 b2 b1 bo b7 b6 bs b4 b3 b2 bi bo b7 be bs ba b3|b2b||bo b3 b2 bbob7 b6 bs b4 b7 b6 bs b4 b3 b2b1 bo b7 b6 bs b4 b3 b2 bi bo Swap Split Combine nナ サー M一
Fantastic news! We've Found the answer you've been seeking!
Step by Step Answer:
Answer rating: 75% (12 reviews)
In DES all ...View the full answer
Answered By
Munir Ahmed Jakhro
I am professional Tutor of of Business Courses, I did my four years Bachelor Degree from one of the Top Business schools of World "Institute of Business Administration" in year 2013. Since then I have been working as Tutor of Accounting, Finance tutor on different online platforms like this website. I am have experience of 6 years teaching business courses to students online and offline my professional job at national savings also helped me in accounting understanding .
4.90+
8+ Reviews
10+ Question Solved
Related Book For
Question Posted:
Students also viewed these Computer science questions
-
In Figure 31.9 we have a swapper in each round. What is the use of this swapper? Figure 31.9 64-bit plaintext DES 32 bits 32 bits 41 Initial permutation K1 Round I 48-bit f( R1. K ) K; Round i 56-bit...
-
In Figure 31.9, we have two straight permutation operations: initial permutation and final permutation. Experts believe these operations are useless and do not help to make the cipher stronger. Can...
-
In Figure 17.5, do we have a loop problem if we change each hub in the LANs to a link-layer switch? Figure 17.5 Figure 17.5 Loop problem in a learning switch a. Station A sends a frame to station D...
-
The reconciling item in a bank reconciliation that will result in an adjusting entry by the depositor is: (a) outstanding checks. (b) deposit in transit. (c) a bank error. (d) bank service charges.
-
Discuss the brand management and its relationship with marketing communication campaigns using examples to illustrate.
-
Laker Company reported the following January purchases and sales data for its only product. The Company uses a periodic inventory system. For specific identification, ending inventory consists of 214...
-
Event A: Randomly select a female badminton player. Event B: Randomly select a badminton player who is 25 years old. Determine whether the events are mutually exclusive. Explain your reasoning.
-
Air France-KLM (AF), a Franco-Dutch company, prepares its financial statements according to International Financial Reporting Standards. AF's financial statements and disclosure notes for the year...
-
Discuss the principles of structured catalysts and reactors in process intensification, analyzing the design and performance characteristics of structured packing, monolithic reactors, and...
-
a) Why is the external load resistor (RL) of the LM 741 set at 1 k? in Fig. 2? What will happen if RL= 100 ? and Vo= 10 Vp? b) The LM 741 is connected to a DC source of?12 V. What is the maximum...
-
A cryptographic hash function needs to be second preimage resistant, which means that given the message M and the message digest d, we should not be able to find any other message, M, whose digest is...
-
In RSA, given p = 107, q = 113, e = 13, and d = 3653, encrypt the message THIS IS TOUGH using 00 to 26 (A: 00 and space: 26) as the encoding scheme. Decrypt the ciphertext to find the original...
-
What are the three most important decisions managers must make regarding the budgeting process?
-
Illustrate the GDP gap using the AD-AS Model and the AE Model, if the natural level of income is estimated as $490,000 million. Part (11) If the government wants to close the existing GDP gap (use...
-
2. Calculate the WACC for the Company XYZ. It has a capital structure that consists of 80% equity and 20% debt. The company's long-term bonds have a before-tax yield to maturity of 8.4 percent. The...
-
Write a function (reverse sentence.m) that takes a single input argument which is a string containing a sentence (a sequence of words) and returns a single output argument which is a string...
-
explain the role of mitochondria in aerobic respiration, including the electron transport chain and oxidative phosphorylation?
-
Asset A has an annual return of 10% and a standard deviation of 15%. Asset B has an annual return of 8% and a standard deviation of 10%. The portfolio consists of these two assets in different...
-
How does discounting, as used in determining present value, relate to compounding, as used in determining future value? How would present value ever be used?
-
You are thinking of investing in one of two companies. In one annual report, the auditors opinion states that the financial statements were prepared in accordance with generally accepted accounting...
-
Fill in the blanks in each of the following statements: a) The programs that run on a computer are referred to as ________. b) Systems such as smartphones, appliances, game controllers, cable set-top...
-
Fill in the blanks in each of the following statements: a) Although many different OOAD processes exist, a single graphical language for communicating the results of any OOAD process has come into...
-
State whether each of the following is true or false. If false, explain why. a) The smallest data item in a computer can assume the value 1 or the value 2. Such a data item is called a bit (short for...
-
Large-scale industrial production - accompanied by massive technological change, expanding international communication networks, and pro-growth government policies-generated rapid economic...
-
How can this relate to individuals who have had a TBI and are currently homeless or marginally housed?
-
1. According to Marxian theory, are crises an economic process inherent to the accumulation dynamics of current capitalism? Justify your answer. 2. According to Marxian theory, what do you consider...
Study smarter with the SolutionInn App