WGU Course C839 - Intro to
Cryptography Exam Study
Guide– Practice Questions with
Verified Answers. GRADED A+.
What type of encryption uses different keys to encrypt and decrypt the message?
,A Symmetric
B Private key
C Secure
D Asymmetric - Answer D
The most widely used asymmetric encryption algorithm is what?
A RSA
B Vigenere
C DES
D Caesar Cipher - Answer A
Original, unencrypted information is referred to as .
A text
B plaintext
C cleantext
D ciphertext - Answer B
Which of the following is NOT an asymmetric system?
A PGP
B RSA
C SSL
D DES - Answer D
In order for User A to send User B an encrypted message that only User B can read,
User A must encrypt message with which of the following keys?
A User A's public key
B User A's private ke y
C User B's public key
D User B's private key - Answer C
The greatest weakness with symmetric algorithms is .
A They are less secure than asymmetric
B The problem of key exchange
C They are slower than asymmetric
D The problem of generating keys - Answer B
Which of the following is generally true about block sizes?
,A Smaller block sizes increase security
B Block sizes must be more than 256 bits to be secure
C Block size is irrelevant to security
D Larger block sizes increase security - Answer D
A is a function that takes a variable -size input m and returns a fixed-size
string.
A Symmetric cipher
B Hash
C Asymmetric cipher
D Feistel - Answer B
Which of the following is a cryptographic protocol that allows two parties to establish
a shared key over an insecure channel?
A Elliptic Curve
B RSA
C MD5
D Diffie-Hellman - Answer D
A is a digital representation of information that identifies you as a
relevant entity by a trusted third party?
A Digital Signature
B Hash
C Ownership stamp
D Digest - Answer A
What is the standard used by most digital certificates?
A X.509
B CRL
C RFC 2298
D OCSP - Answer A
DES uses keys of what size?
A 56 bits
B 192 bits C 128 bits
D 64 bits - Answer A
Which of the following is NOT a key size used by AES?
A 512 bits
, B 128
bits
C 192
bits
D 256 bits
- Answer A
Which of the following
was a multi alphabet
cipher widely used
from the 16th century
(1553) to the
early 20th
century
(1900s)?
A It is the same length as the original text
Cryptography Exam Study
Guide– Practice Questions with
Verified Answers. GRADED A+.
What type of encryption uses different keys to encrypt and decrypt the message?
,A Symmetric
B Private key
C Secure
D Asymmetric - Answer D
The most widely used asymmetric encryption algorithm is what?
A RSA
B Vigenere
C DES
D Caesar Cipher - Answer A
Original, unencrypted information is referred to as .
A text
B plaintext
C cleantext
D ciphertext - Answer B
Which of the following is NOT an asymmetric system?
A PGP
B RSA
C SSL
D DES - Answer D
In order for User A to send User B an encrypted message that only User B can read,
User A must encrypt message with which of the following keys?
A User A's public key
B User A's private ke y
C User B's public key
D User B's private key - Answer C
The greatest weakness with symmetric algorithms is .
A They are less secure than asymmetric
B The problem of key exchange
C They are slower than asymmetric
D The problem of generating keys - Answer B
Which of the following is generally true about block sizes?
,A Smaller block sizes increase security
B Block sizes must be more than 256 bits to be secure
C Block size is irrelevant to security
D Larger block sizes increase security - Answer D
A is a function that takes a variable -size input m and returns a fixed-size
string.
A Symmetric cipher
B Hash
C Asymmetric cipher
D Feistel - Answer B
Which of the following is a cryptographic protocol that allows two parties to establish
a shared key over an insecure channel?
A Elliptic Curve
B RSA
C MD5
D Diffie-Hellman - Answer D
A is a digital representation of information that identifies you as a
relevant entity by a trusted third party?
A Digital Signature
B Hash
C Ownership stamp
D Digest - Answer A
What is the standard used by most digital certificates?
A X.509
B CRL
C RFC 2298
D OCSP - Answer A
DES uses keys of what size?
A 56 bits
B 192 bits C 128 bits
D 64 bits - Answer A
Which of the following is NOT a key size used by AES?
A 512 bits
, B 128
bits
C 192
bits
D 256 bits
- Answer A
Which of the following
was a multi alphabet
cipher widely used
from the 16th century
(1553) to the
early 20th
century
(1900s)?
A It is the same length as the original text
