C839- Cryptography Exam Questions with Correct Answers| Latest Update
Guaranteed Success
What defines a prime number? Only has factors of itself and 1
What is 29 mod 12? 5
What happens to the hash of a file if it is rehashed after the first character of the file is
changed? The entire hash is different.
What is the length (in bits) of an MD5 hash output? 128
How many characters are used in an LM hash password? 14
A Windows credential is identified as follows:
user:FDA95FBABC199D22LLD3B435B51876KK:199DDFD4EF0E9CD9KMNC6FE771IL124B8:::Wha
t is used to store this password? NTLM
What is a rainbow table? Precompiled list of hash values
Which mode encrypts each group with the same key, leaving each group independent of the
others? ECB
Which mode of block encryption results in the same outcome for matching blocks of a plaintext
message? Electronic Code Book (ECB)
How does CBC mode encryption function? Uses an initialization vector (IV) to encrypt the
first block, then uses the result of the encryption to encrypt the next block
, Which encryption mode always produces the same result for the same plaintext? ECB
Which information protection method has an 80-bit key and operates on 64-bit data blocks?
Skipjack
How many transformation rounds does AES use with a 192-bit key? 12
How many transformation rounds does AES use with a 128-bit key? 10
Which encryption algorithm did the National Institute of Standards and Technology (NIST)
designate as a specification for the encryption of electronic information? AES
A security analyst decrypted a data set with the same key that originally encrypted the data
set.Which cryptographic operation did the analyst use? symmetric
What should be used when large amounts of data need to be encrypted and decrypted for
secure storage based on groupings of 128, 192, or 256 bits? symmetric block
Why is symmetric stream used to encrypt video when speed is a major concern? It uses the
same key to encrypt and decrypt large amounts of media.
Why should an asymmetric public key be used to encrypt a symmetric key that is being sent to
one person? It encrypts a small amount of information, which is decrypted with the
corresponding private key.
Which type of attacks are Diffie-Hellman methods vulnerable to? Man-in-the-middle
Guaranteed Success
What defines a prime number? Only has factors of itself and 1
What is 29 mod 12? 5
What happens to the hash of a file if it is rehashed after the first character of the file is
changed? The entire hash is different.
What is the length (in bits) of an MD5 hash output? 128
How many characters are used in an LM hash password? 14
A Windows credential is identified as follows:
user:FDA95FBABC199D22LLD3B435B51876KK:199DDFD4EF0E9CD9KMNC6FE771IL124B8:::Wha
t is used to store this password? NTLM
What is a rainbow table? Precompiled list of hash values
Which mode encrypts each group with the same key, leaving each group independent of the
others? ECB
Which mode of block encryption results in the same outcome for matching blocks of a plaintext
message? Electronic Code Book (ECB)
How does CBC mode encryption function? Uses an initialization vector (IV) to encrypt the
first block, then uses the result of the encryption to encrypt the next block
, Which encryption mode always produces the same result for the same plaintext? ECB
Which information protection method has an 80-bit key and operates on 64-bit data blocks?
Skipjack
How many transformation rounds does AES use with a 192-bit key? 12
How many transformation rounds does AES use with a 128-bit key? 10
Which encryption algorithm did the National Institute of Standards and Technology (NIST)
designate as a specification for the encryption of electronic information? AES
A security analyst decrypted a data set with the same key that originally encrypted the data
set.Which cryptographic operation did the analyst use? symmetric
What should be used when large amounts of data need to be encrypted and decrypted for
secure storage based on groupings of 128, 192, or 256 bits? symmetric block
Why is symmetric stream used to encrypt video when speed is a major concern? It uses the
same key to encrypt and decrypt large amounts of media.
Why should an asymmetric public key be used to encrypt a symmetric key that is being sent to
one person? It encrypts a small amount of information, which is decrypted with the
corresponding private key.
Which type of attacks are Diffie-Hellman methods vulnerable to? Man-in-the-middle
