CRYPTOGRAPHY STUDY SHEET SOLUTIONS
2026 CORRECT ANSWERS VERIFIED
◍ 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
◍ 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)?
2026 CORRECT ANSWERS VERIFIED
◍ 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
◍ 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)?
