WGU INTRODUCTION TO CRYPTOGRAPHY C839 COMPREHENSIVE SCRIPT 2026 QUESTIONS AND SOLUTIONS

WGU INTRODUCTION TO CRYPTOGRAPHY
C839 COMPREHENSIVE SCRIPT 2026
QUESTIONS AND SOLUTIONS

◉ What is a salt?


A Key rotation


B Random bits intermixed with a hash to increase randomness and
reduce collisions.


C Random bits intermixed with a symmetric cipher to increase
randomness and make it more secure.


D Key whitening. Answer: B


◉ RFC 1321 describes what hash?


A RIPEMD
B SHA1
C GOST
D MD5. Answer: D

,◉ What size block does FORK256 use?


A 256
B 128
C 512
D 64. Answer: C


◉ In 1977 researchers at MIT described what asymmetric
algorithm?


A RSA
B AES
C DH
D EC. Answer: A


◉ What is the formula (M^e)(%n) related to?


A Encrypting with EC
B Generating Mersenne primes
C Decrypting with RSA
D Encrypting with RSA. Answer: C

,◉ Which of the following equations is related to EC?


A P = Cd%n
B Me%n
C y2 = x3 + Ax + B
D Let m = (p-1)(q-1). Answer: C


◉ U.S. Patent 5,231,668 and FIPS 186 define what algorithm?


A AES
B RSA
C Elliptic Curve (EC)
D Digital Signature Algorithm (DSA). Answer: D


◉ What is X.509?


A The standard for PGP certificates
B The standard for encrypting email
C The standard for FIPS 186
D The standard for digital certificates. Answer: D

, ◉ What is contained in a CRL?


A Keys for RSA
B New certificates
C Revoked certificates
D Keys for AES. Answer: C


◉ What does the Online Certificate Status Protocol (OCSP) provide?


A Revoked certificates
B Hashing
C VPN connectivity
D Encryption. Answer: A


◉ In terms of cryptanalysis, what does it mean to break a cipher?


A finding a method to decrypt a message that is at least twice as
efficient as brute force


B trying every possible key until you can decrypt the message


C deploying an algorithm that uses a 228 bit key