WGU INTRODUCTION TO CRYPTOGRAPHY
C839 COMPREHENSIVE STUDY GUIDE
◉ 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 key
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
C839 COMPREHENSIVE STUDY GUIDE
◉ 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 key
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
