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WGU C839 OBJECTIVE ASSESSMENT /WGU C839 INTRODUCTION TO CRYPTOGRAPHY OA ACTUAL EXAM 300 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RTIONALES|ALREADY GRADED A+ $27.99
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WGU C839 OBJECTIVE ASSESSMENT /WGU C839 INTRODUCTION TO CRYPTOGRAPHY OA ACTUAL EXAM 300 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RTIONALES|ALREADY GRADED A+
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WGU C839 OBJECTIVE ASSESSMENT
Institution
WGU C839 OBJECTIVE ASSESSMENT
WGU C839 OBJECTIVE ASSESSMENT /WGU C839
INTRODUCTION TO CRYPTOGRAPHY OA ACTUAL EXAM 300
QUESTIONS AND CORRECT DETAILED ANSWERS WITH
RTIONALES|ALREADY GRADED A+
WGU C839 OBJECTIVE ASSESSMENT /WGU C839
INTRODUCTION TO CRYPTOGRAPHY OA ACTUAL EXAM 300
QUESTIONS AND CORRECT DETAILED ANSWER...
WGU C839 OBJECTIVE ASSESSMENT 2023-2024 /WGU C839
INTRODUCTION TO CRYPTOGRAPHY OA ACTUAL EXAM 300
QUESTIONS AND CORRECT DETAILED ANSWERS WITH
RTIONALES|ALREADY GRADED A+
____ was designed to provide built in cryptography for the clipper chip.
A Blowfish
B Skipjack
C GOST
D 3DES - ANSWER-B
Which of the following uses an 80 bit key on 64 bit blocks?
A Twofish
B AES
C Skipjack
D DES - ANSWER-C
With _____, the message is divided into blocks and each block is encrypted separately. This is the most
basic mode for symmetric encryption.
A Electronic codebook (ECB)
B Cipher-block chaining (CBC)
C Cipher feedback (CFB)
D Output feedback (OFB) - ANSWER-A
Which of the following is an example of an unbalanced Feistel?
A 3DES
B Skipjack
C Twofish
D AES - ANSWER-B
,This process is done by having each block of plaintext is XORed with the previous ciphertext block before
being encrypted.
A Output feedback (OFB)
B Cipher-block chaining (CBC)
C Electronic codebook (ECB)
D Cipher feedback (CFB) - ANSWER-B
The process wherein the ciphertext block is encrypted then the ciphertext produced is XOR'd back with
the plaintext to produce the current ciphertext block is called what?
A Output feedback (OFB)
B Cipher-block chaining (CBC)
C Cipher feedback (CFB)
D Electronic codebook (ECB) - ANSWER-C
This is a method for turning a block cipher into a stream cipher by generating a keystream block, which
are then XORed with the plaintext blocks to get the ciphertext.
A Cipher feedback (CFB)
B Electronic codebook (ECB)
C Output feedback (OFB)
D Cipher-block chaining (CBC) - ANSWER-C
Which of the following modes can be used to turn a block cipher into a stream cipher?
A Propagating cipher-block chaining (PCBC) and Electronic codebook (ECB)
B Counter Mode (CTR) and Propagating cipher-block chaining (PCBC)
C Electronic codebook (ECB) and Output feedback (OFB)
D Output feedback (OFB) and Counter Mode (CTR) - ANSWER-D
A fixed-size pseudorandom number that is fed into a symmetric cipher to increase randomness is called
what?
,A IV
B Key
C Chain
D Salt - ANSWER-A
A number that is used only one time then discarded is called what?
A Nonce
B Chain
C Salt
D IV - ANSWER-A
Which of the following is a stream cipher that uses variable length key from 1 to 256 bytes?
A RC4
B AES
C DESx
D DES - ANSWER-A
This algorithm was published by the German engineering firm Seimans in 1993. It is a software based
stream cipher using Lagged Fibonacci generator along with a concept borrowed from the shrinking
generator ciphers.
A RC4
B Blowfish
C FISH
D Twofish - ANSWER-C
Which of the following is NOT required for a hash?
A Minimum key length of 256 bits
B Variable-length input, fixed-length output
C Non-reversible
, D Few collisions - ANSWER-A
A ______ refers to a situation where two different inputs yield the same output.
A Substitution
B Convergence
C Collision
D Transposition - ANSWER-C
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
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