Question 1

Describe how hash functions work and what they are used for.

Accepted Answer

The answer of Describe how hash functions work and what...

Question 2

A(n) ____________________ substitution uses one alphabet.

Accepted Answer

The answer of A(n) ____________________ substitution uses one alphabet....

Question 3

SHA-1 produces a(n) ___________-bit message digest, which can then be used as an input to a digital signature algorithm.

Accepted Answer

A) 48 
B) 56 
C) 160 
D) 256

Question 4

In PKI, the CA periodically distributes a(n) _________ to all users that identifies all revoked certificates.

Accepted Answer

A) CRL 
B) RA 
C) MAC 
D) RDL

Question 5

The successor to 3DES is the ____________________ Encryption Standard.

Accepted Answer

The answer of The successor to 3DES is the ____________________...

Question 6

Sequence encryption is a series of encryptions and decryptions between a number of systems, wherein each system in a network decrypts the message sent to it and then reencrypts it using different keys and sends it to the next neighbor. This process continues until the message reaches the final destination.

Accepted Answer

A) True 
 B)False

Question 7

PKI systems are based on public-key cryptosystems and include digital certificates and certificate authorities.

Accepted Answer

A) True 
 B)False

Question 8

In addition to being credited with inventing a substitution cipher, Julius Caesar was associated with an early version of the transposition cipher.

Accepted Answer

A) True 
 B)False

Question 9

At the World Championships in Athletics in Helsinki in August 2005, a virus called Cabir infected dozens of __________, the first time this occurred in a public setting.

Accepted Answer

A) iPad tablets 
B) Bluetooth mobile phones 
C) WiFi routers 
D) laptop Macintosh computers

Question 10

Secure Multipurpose Internet Mail Extensions builds on the encoding format of the MIME protocol and uses digital signatures based on public-key cryptosystems to secure e-mail. _________________________

Accepted Answer

A) True 
 B)False

Question 11

Digital ____________________ are encrypted messages that can be mathematically proven to be authentic.

Accepted Answer

The answer of Digital ____________________ are encrypted messages that can...

Question 12

Pretty Good Privacy (PGP) uses the freeware ZIP algorithm to compress the message after it has been digitally signed but before it is encrypted. _________________________

Accepted Answer

A) True 
 B)False

Question 13

Originally released as freeware, ____________________ is a hybrid cryptosystem that combines some of the best available cryptographic algorithms as an open-source de facto standard for encryption and authentication of e-mail and file storage.

Accepted Answer

The answer of Originally released as freeware, ____________________ is a...

Question 14

The Secure ____________________ Standard issued by the National Institute of Standards and Technology specifies secure algorithms, such as SHA-1, for computing a condensed representation of a message or data file.

Accepted Answer

The answer of The Secure ____________________ Standard issued by the...

Question 15

The AES algorithm was the first public-key encryption algorithm to use a 256-bit key length.

Accepted Answer

A) True 
 B)False

Question 16

To ____________________ means to encrypt, encode, or convert plaintext into the equivalent ciphertext.

Accepted Answer

The answer of To ____________________ means to encrypt, encode, or...

Question 17

A method of encryption that requires the same secret key to encipher and decipher the message is known as __________ encryption.

Accepted Answer

A) asymmetric 
B) symmetric 
C) public 
D) private

Question 18

Diffie-Hellman key exchange uses asymmetric encryption to exchange session keys. _________________________

Accepted Answer

A) True 
 B)False

Question 19

One of the most widely known cryptographic algorithms is the ____________________, which was developed by IBM and is based on the company's Lucifer algorithm.

Accepted Answer

The answer of One of the most widely known cryptographic...

Question 20

Hashing functions do not require the use of keys, but it is possible to attach a ____________________ code to allow only specified recipients to access the message digest.

Accepted Answer

The answer of Hashing functions do not require the use...

Exam 8: Cryptography

Describe how hash functions work and what they are used for.

A(n) ____________________ substitution uses one alphabet.

SHA-1 produces a(n) ___________-bit message digest, which can then be used as an input to a digital signature algorithm.

In PKI, the CA periodically distributes a(n) _________ to all users that identifies all revoked certificates.

The successor to 3DES is the ____________________ Encryption Standard.

PKI systems are based on public-key cryptosystems and include digital certificates and certificate authorities.

In addition to being credited with inventing a substitution cipher, Julius Caesar was associated with an early version of the transposition cipher.

At the World Championships in Athletics in Helsinki in August 2005, a virus called Cabir infected dozens of __________, the first time this occurred in a public setting.

Secure Multipurpose Internet Mail Extensions builds on the encoding format of the MIME protocol and uses digital signatures based on public-key cryptosystems to secure e-mail. _________________________

Digital ____________________ are encrypted messages that can be mathematically proven to be authentic.

Pretty Good Privacy (PGP) uses the freeware ZIP algorithm to compress the message after it has been digitally signed but before it is encrypted. _________________________

Originally released as freeware, ____________________ is a hybrid cryptosystem that combines some of the best available cryptographic algorithms as an open-source de facto standard for encryption and authentication of e-mail and file storage.

The Secure ____________________ Standard issued by the National Institute of Standards and Technology specifies secure algorithms, such as SHA-1, for computing a condensed representation of a message or data file.

The AES algorithm was the first public-key encryption algorithm to use a 256-bit key length.

To ____________________ means to encrypt, encode, or convert plaintext into the equivalent ciphertext.

A method of encryption that requires the same secret key to encipher and decipher the message is known as __________ encryption.

Diffie-Hellman key exchange uses asymmetric encryption to exchange session keys. _________________________

One of the most widely known cryptographic algorithms is the ____________________, which was developed by IBM and is based on the company's Lucifer algorithm.

Hashing functions do not require the use of keys, but it is possible to attach a ____________________ code to allow only specified recipients to access the message digest.