WGU C839 EXAM 100 REAL OA EXAM
(VERSION A & B) | NEWEST ACTUAL EXAM
COMPREHENSIVE QUESTIONS AND
VERIFIED ANSWERS GRADED A+ | 100%
CORRECT | 2024 UPDATE!!
What is the hidden message in a steganographic communication? -
✔✔✔ Correct Answer > Payload
Which cryptanalysis method involves a person being tricked into
encrypting a set of known messages? - ✔✔✔ Correct Answer >
Chosen plaintext attack
This is a 128 bit hash that is specified by RFC 1321. It was designed by
Ron Rivest in 1991 to replace an earlier hash function. - ✔✔✔ Correct
Answer > MD5
A cipher is defined as what - ✔✔✔ Correct Answer > The
algorithm(s) needed to encrypt and decrypt a message
AES is what type of system? - ✔✔✔ Correct Answer > Symmetric
systems
,This hash function uses 512-bit blocks and implements preset constants
that change after each repetition. Each block is hashed into a 256-bit
block through four branches that divides each 512 block into sixteen
32-bit words that are further encrypted and rearranged - ✔✔✔
Correct Answer > FORK256
Which technique does related-key cryptanalysis use to decipher a
message? - ✔✔✔ Correct Answer > Messages are encrypted using
different secrets, and the analyst compares the messages to figure out
how the algorithm works.
Which type of cryptography is being used when the author uses secret
inks? - ✔✔✔ Correct Answer > Steganography
How did the ATBASH cipher work? - ✔✔✔ Correct Answer > By
substituting each letter for the letter from the opposite end of the
alphabet (i.e. A becomes Z, B becomes Y, etc.)
DES has a key space of what? - ✔✔✔ Correct Answer > 2 to the 56th
power
Which of the following are valid key sizes for AES (choose three)? -
✔✔✔ Correct Answer > 128/192/256
, Which of the following algorithms uses three different keys to encrypt
the plain text? - ✔✔✔ Correct Answer > 3DES
AES is what type of cipher? - ✔✔✔ Correct Answer > Block Cipher
Which of the following is a type of encryption that has two different
keys. One key can encrypt the message and the other key can only
decrypt it? - ✔✔✔ Correct Answer > Asymmetric
Which of the following is an asymmetric cipher? - ✔✔✔ Correct
Answer > RSA
John is going to use RSA to encrypt a message to Joan. What key should
he use? - ✔✔✔ Correct Answer > Joan's public key
What advantage do symmetric algorithms have over asymmetric
algorithms - ✔✔✔ Correct Answer > They are faster
Which of the following is generally true about key sizes? - ✔✔✔
Correct Answer > Larger key sizes increase security
A _____ is a function and is not reversible. - ✔✔✔ Correct Answer >
Hash
(VERSION A & B) | NEWEST ACTUAL EXAM
COMPREHENSIVE QUESTIONS AND
VERIFIED ANSWERS GRADED A+ | 100%
CORRECT | 2024 UPDATE!!
What is the hidden message in a steganographic communication? -
✔✔✔ Correct Answer > Payload
Which cryptanalysis method involves a person being tricked into
encrypting a set of known messages? - ✔✔✔ Correct Answer >
Chosen plaintext attack
This is a 128 bit hash that is specified by RFC 1321. It was designed by
Ron Rivest in 1991 to replace an earlier hash function. - ✔✔✔ Correct
Answer > MD5
A cipher is defined as what - ✔✔✔ Correct Answer > The
algorithm(s) needed to encrypt and decrypt a message
AES is what type of system? - ✔✔✔ Correct Answer > Symmetric
systems
,This hash function uses 512-bit blocks and implements preset constants
that change after each repetition. Each block is hashed into a 256-bit
block through four branches that divides each 512 block into sixteen
32-bit words that are further encrypted and rearranged - ✔✔✔
Correct Answer > FORK256
Which technique does related-key cryptanalysis use to decipher a
message? - ✔✔✔ Correct Answer > Messages are encrypted using
different secrets, and the analyst compares the messages to figure out
how the algorithm works.
Which type of cryptography is being used when the author uses secret
inks? - ✔✔✔ Correct Answer > Steganography
How did the ATBASH cipher work? - ✔✔✔ Correct Answer > By
substituting each letter for the letter from the opposite end of the
alphabet (i.e. A becomes Z, B becomes Y, etc.)
DES has a key space of what? - ✔✔✔ Correct Answer > 2 to the 56th
power
Which of the following are valid key sizes for AES (choose three)? -
✔✔✔ Correct Answer > 128/192/256
, Which of the following algorithms uses three different keys to encrypt
the plain text? - ✔✔✔ Correct Answer > 3DES
AES is what type of cipher? - ✔✔✔ Correct Answer > Block Cipher
Which of the following is a type of encryption that has two different
keys. One key can encrypt the message and the other key can only
decrypt it? - ✔✔✔ Correct Answer > Asymmetric
Which of the following is an asymmetric cipher? - ✔✔✔ Correct
Answer > RSA
John is going to use RSA to encrypt a message to Joan. What key should
he use? - ✔✔✔ Correct Answer > Joan's public key
What advantage do symmetric algorithms have over asymmetric
algorithms - ✔✔✔ Correct Answer > They are faster
Which of the following is generally true about key sizes? - ✔✔✔
Correct Answer > Larger key sizes increase security
A _____ is a function and is not reversible. - ✔✔✔ Correct Answer >
Hash
