QUIZ 2 CECS 378 QUESTIONS AND ANSWERS
"The input to the encryption algorithm is the XOR of the next 64 bits of plaintext and the preceding 64
bits of ciphertext" is a description of the _____ mode of operation. - CORRECT ANSWER✅✅Cipher
Block Chaining (CBC) .
"Must support hash value lengths of 224, 256, 384, and 512 bits" and "algorithm must process small
blocks at a time instead of requiring the entire message to be buffered in memory before processing it"
are requirements for________. - CORRECT ANSWER✅✅SHA-3
Perhaps the most widely used public-key algorithms are _________ and Diffie-Hellman - CORRECT
ANSWER✅✅RSA
The security of any MAC function based on an embedded hash function depends in some way on the
_______ strength of the underlying hash function. - CORRECT ANSWER✅✅cryptographic
9. A __________ type of attack exploits properties of the RSA algorithm.
A. timing
B. brute-force
C. chosen ciphertext
D. mathematical - CORRECT ANSWER✅✅C. chosen ciphertext
With ____ encryption the encryption process is carried out at the two end systems. - CORRECT
ANSWER✅✅end-to-end
12. A ________ is a key used between entities for the purpose of distributing session keys.
A. permanent key
B. session key
C. distribution key
D. all of the above - CORRECT ANSWER✅✅A. permanent key
, 4. If the analyst is able to get the source system to insert into the system a message chosen by the
analyst,
then a ________ attack is possible.
A. known-plaintext
B. chosen-plaintext
C. chosen ciphertext D. chosen text - CORRECT ANSWER✅✅B. chosen-plaintext
11. __________ is a term that refers to the means of delivering a key to two parties that wish to
exchange data without allowing others to see the key.
A. Session key
B. Subkey
C. Key distribution technique
D. Ciphertext key - CORRECT ANSWER✅✅C. Key distribution technique
10. ______ mode is typically used for a general-purpose block-oriented transmission and is useful for
high-speed requirements.
A. ECB
B. OFB
C. CFB
D. CTR - CORRECT ANSWER✅✅D. CTR
9. For general-purpose stream-oriented transmission you would typically use _______ mode.
A. CTR
B. CFB
C. ECB
D. CBC - CORRECT ANSWER✅✅B. CFB
8. For general-purpose block-oriented transmission you would typically use _______ mode.
A. CBC
B. CTR
"The input to the encryption algorithm is the XOR of the next 64 bits of plaintext and the preceding 64
bits of ciphertext" is a description of the _____ mode of operation. - CORRECT ANSWER✅✅Cipher
Block Chaining (CBC) .
"Must support hash value lengths of 224, 256, 384, and 512 bits" and "algorithm must process small
blocks at a time instead of requiring the entire message to be buffered in memory before processing it"
are requirements for________. - CORRECT ANSWER✅✅SHA-3
Perhaps the most widely used public-key algorithms are _________ and Diffie-Hellman - CORRECT
ANSWER✅✅RSA
The security of any MAC function based on an embedded hash function depends in some way on the
_______ strength of the underlying hash function. - CORRECT ANSWER✅✅cryptographic
9. A __________ type of attack exploits properties of the RSA algorithm.
A. timing
B. brute-force
C. chosen ciphertext
D. mathematical - CORRECT ANSWER✅✅C. chosen ciphertext
With ____ encryption the encryption process is carried out at the two end systems. - CORRECT
ANSWER✅✅end-to-end
12. A ________ is a key used between entities for the purpose of distributing session keys.
A. permanent key
B. session key
C. distribution key
D. all of the above - CORRECT ANSWER✅✅A. permanent key
, 4. If the analyst is able to get the source system to insert into the system a message chosen by the
analyst,
then a ________ attack is possible.
A. known-plaintext
B. chosen-plaintext
C. chosen ciphertext D. chosen text - CORRECT ANSWER✅✅B. chosen-plaintext
11. __________ is a term that refers to the means of delivering a key to two parties that wish to
exchange data without allowing others to see the key.
A. Session key
B. Subkey
C. Key distribution technique
D. Ciphertext key - CORRECT ANSWER✅✅C. Key distribution technique
10. ______ mode is typically used for a general-purpose block-oriented transmission and is useful for
high-speed requirements.
A. ECB
B. OFB
C. CFB
D. CTR - CORRECT ANSWER✅✅D. CTR
9. For general-purpose stream-oriented transmission you would typically use _______ mode.
A. CTR
B. CFB
C. ECB
D. CBC - CORRECT ANSWER✅✅B. CFB
8. For general-purpose block-oriented transmission you would typically use _______ mode.
A. CBC
B. CTR
