Reference no: EM13839134
Cryptography and Network Security: Principles and Practices, 6th Edition, by William Stalling,
Question 1:
Which parameters and design choices determine the actual algorithm of a Feistel cipher?
Question 2:
What is the difference between differential and linear cryptanalysis?
Question 3:
Review Question on page 125 of textbook
List three classes of polynomial arithmetic.
Question 4:
Does the set of residue classes modulo 3 form a group?
a. with respect to addition?
b. with respect to multiplication?
Question 5:
Find integers x such that:
a. 5x ≡4 (mod 3)
b. 7x≡6 (mod 5)
c. 9x ≡8 (mod 7)
Question 6:
In this text we assume that the modulus is a positive integer. But the definition of the expression a mod n also makes perfect sense if n is negative. Determine the following:
a. 5 mod 3
b. 5 mod -3
c. -5 mod 3
d. -5 mod -3
Question 7:
A modulus of 0 does not fit the definition, but is defined by convention as follows: a mod 0 = a. With this definition in mind, what does the following expression mean:
a ≡ b (mod 0)
Question 8:
Using the extended Euclidean algorithm, and find the multiplicative inverse of
a. 1234 mod 4321
b. 24140 mod 40902
c. 550 mod 1769
Question 9:
Develop a set of tables similar to Table 4.5 for GF(5).
Question 10:
Develop a set of tables similar to Table 4.7 for GF(4) with m(x) = x2+ x +1
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