Question 1

Unlike RSA,DSS cannot be used for encryption or key exchange.

Accepted Answer

A) True 
 B)False

Question 2

RSA is a block cipher in which the plaintext and ciphertext are integers
between 0 and n - 1 for some n.

Accepted Answer

A) True 
 B)False

Question 3

A ________ attack involves trying all possible private keys.

Accepted Answer

A) mathematical 
B) timing 
C) brute-force 
D) chosen ciphertext

Question 4

SHA-3 algorithms must be designed to resist any potentially
successful attack on SHA-2 functions.

Accepted Answer

A) True 
 B)False

Question 5

The operations performed during a round consist of circular
shifts,and primitive Boolean functions based on DSS,MD5,SHA,and RSA.

Accepted Answer

A) True 
 B)False

Question 6

The evaluation criteria for the new hash function are: security,_______,and algorithm and implementation characteristics.

Accepted Answer

The answer of The evaluation criteria for the new hash...

Question 7

Cryptographic hash functions generally execute faster in software
than conventional encryption algorithms such as DES.

Accepted Answer

A) True 
 B)False

Question 8

__________ are alarming for two reasons: they come from a completely unexpected direction and they are a ciphertext-only attack.

Accepted Answer

The answer of __________ are alarming for two reasons: they...

Question 9

The _________ scheme has reigned supreme as the most widely accepted and implemented approach to public-key encryption.

Accepted Answer

A) SHA-1 
B) HMAC 
C) MD5 
D) RSA

Question 10

NIST has published FIPS PUB 186,which is known as the ___________.

Accepted Answer

The answer of NIST has published FIPS PUB 186,which is...

Question 11

Although the _________ attack is a serious threat,there are simple countermeasures that can be used such as constant time calcs,random delays or blinding computations.

Accepted Answer

A) timing 
B) chosen ciphertext 
C) mathematical 
D) none of the above

Question 12

The one-way hash function is important not only in message
authentication but also in digital signatures.

Accepted Answer

A) True 
 B)False

Question 13

The DSS makes use of the _________ and presents a new digital signature technique,the Digital Signature Algorithm (DSA).

Accepted Answer

A) HMAC 
B) XOR 
C) RSA 
D) SHA-1

Question 14

The principal attraction of __________ compared to RSA is that it appears to offer equal security for a far smaller bit size,thereby reducing processing overhead.

Accepted Answer

A) ECC 
B) MD5 
C) Diffie-Hellman 
D) none of the above

Question 15

Four possible approaches to attacking the RSA algorithm are: brute force,timing attacks,_________ attacks,and chosen ciphertext attacks.

Accepted Answer

The answer of Four possible approaches to attacking the RSA...

Question 16

Versions of SHA,with hash value lengths of 256,384,and 512 bits,(SHA-256,SHA-384,and SHA 512)are collectively known as _________.

Accepted Answer

The answer of Versions of SHA,with hash value lengths of...

Question 17

One of the simplest hash functions is the ________ of every block.

Accepted Answer

The answer of One of the simplest hash functions is...

Question 18

Issued as RFC 2104,__________ has been chosen as the mandatory-to-implement MAC for IP Security.

Accepted Answer

A) RSA 
B) SHA-3 
C) DSS 
D) HMAC

Question 19

Perhaps the most widely used public-key algorithms are _________ and Diffie-Hellman.

Accepted Answer

The answer of Perhaps the most widely used public-key algorithms...

Question 20

SHA is perhaps the most widely used family of hash functions.

Accepted Answer

A) True 
 B)False

Exam 21: Public-Key Cryptography and Message Authentication

Unlike RSA,DSS cannot be used for encryption or key exchange.

RSA is a block cipher in which the plaintext and ciphertext are integers between 0 and n - 1 for some n.

A ________ attack involves trying all possible private keys.

SHA-3 algorithms must be designed to resist any potentially successful attack on SHA-2 functions.

The operations performed during a round consist of circular shifts,and primitive Boolean functions based on DSS,MD5,SHA,and RSA.

The evaluation criteria for the new hash function are: security,_______,and algorithm and implementation characteristics.

Cryptographic hash functions generally execute faster in software than conventional encryption algorithms such as DES.

__________ are alarming for two reasons: they come from a completely unexpected direction and they are a ciphertext-only attack.

The _________ scheme has reigned supreme as the most widely accepted and implemented approach to public-key encryption.

NIST has published FIPS PUB 186,which is known as the ___________.

Although the _________ attack is a serious threat,there are simple countermeasures that can be used such as constant time calcs,random delays or blinding computations.

The one-way hash function is important not only in message authentication but also in digital signatures.

The DSS makes use of the _________ and presents a new digital signature technique,the Digital Signature Algorithm (DSA) .

The principal attraction of __________ compared to RSA is that it appears to offer equal security for a far smaller bit size,thereby reducing processing overhead.

Four possible approaches to attacking the RSA algorithm are: brute force,timing attacks,_________ attacks,and chosen ciphertext attacks.

Versions of SHA,with hash value lengths of 256,384,and 512 bits,(SHA-256,SHA-384,and SHA 512)are collectively known as _________.

One of the simplest hash functions is the ________ of every block.

Issued as RFC 2104,__________ has been chosen as the mandatory-to-implement MAC for IP Security.

Perhaps the most widely used public-key algorithms are _________ and Diffie-Hellman.

SHA is perhaps the most widely used family of hash functions.