Question 1

The number of horizontal and vertical pixels captured and recorded is known as the image's depth._________________________

Accepted Answer

resolution

Question 2

In transport mode the entire IP packet is encrypted and is then placed as the content portion of another IP packet._________________________

Accepted Answer

tunnel

Question 3

Bit stream methods commonly use algorithm functions like the exclusive OR operation (____).
A)XOR
B)EOR
C)NOR
D)OR

Accepted Answer

The exclusive OR operation (XOR) is commonly used in bit stream methods for encryption, decryption, and error detection/correction. It performs a logical comparison between two bits and outputs 1 if they are different and 0 if they are the same, making it particularly useful for generating a random sequence of bits for encryption purposes.

Question 4

____ is the amount of effort (usually in hours)required to perform cryptanalysis to decode an encrypted message when the key or algorithm (or both)are unknown.
A)Code
B)Algorithm
C)Key
D)Work factor

Accepted Answer

The work factor is the amount of effort required to perform cryptanalysis to decode an encrypted message when the key or algorithm (or both) are unknown. This can be measured in terms of time or resources required to conduct the attack.

Question 5

A(n)distinguished name uniquely identifies a certificate entity,to a user's public key._________________________

Accepted Answer

A distinguished name is a unique identifier that consists of several attributes, such as country, organization, and common name, that uniquely identify a certificate entity to a user's public key.

Question 6

____ is the process of converting an original message into a form that is unreadable to unauthorized individuals.
A)Encryption
B)Decryption
C)Cryptology
D)Cryptography

Accepted Answer

Encryption is the process of converting a message into a secret code to protect its confidentiality.

Question 7

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

Accepted Answer

PGP does use the ZIP compression algorithm for message compression before encryption.

Question 8

ESP in transport mode can be used to establish a virtual private network,assuring encryption and authentication between networks communicating via the Internet._________________________

Accepted Answer

tunnel

Question 9

The most popular modern version of steganography involves hiding information within files that contain digital pictures or other images._________________________

Accepted Answer

This statement is true. Steganography can involve hiding information within the pixels of a digital image without visibly altering the image itself. This technique is often used for covert communication or to protect sensitive data.

Question 10

Privacy Enhanced Mail was proposed by the Internet Engineering Task Force and is a standard that uses 3DES symmetric key encryption and RSA for key exchanges and digital signatures._________________________

Accepted Answer

This statement is true. Privacy Enhanced Mail (PEM) was indeed proposed by the Internet Engineering Task Force (IETF) and uses 3DES symmetric key encryption and RSA for key exchanges and digital signatures.

Question 11

Internet Protocol Security is designed to protect data integrity,user confidentiality,and authenticity at the IP packet level._________________________

Accepted Answer

IPsec provides security at the IP packet level to ensure that data is protected from unauthorized access, tampering, or eavesdropping during transmission. It can be used to secure communications between two endpoints or to create a virtual private network (VPN) to connect remote networks securely.

Question 12

Secure HTTP provides the Internet communication services between client and host without consideration for encryption of the data that is transmitted between client and server._________________________

Accepted Answer

Standard

Question 13

A(n)response attack is an attempt to resubmit a recording of the deciphered authentication to gain entry into a secure source._________________________

Accepted Answer

replay

Question 14

An attacker may obtain duplicate texts,one in ciphertext and one in plaintext,and thus reverse-engineer the encryption algorithm in a known-plaintext attack scheme._________________________

Accepted Answer

In a known-plaintext attack scheme, an attacker has access to both plaintext and corresponding ciphertext. This type of attack can be used to analyze the encryption algorithm used and find vulnerabilities. Therefore, an attacker can obtain duplicate texts, one in ciphertext and one in plaintext, and reverse-engineer the encryption algorithm.

Question 15

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

Accepted Answer

Secure Multipurpose Internet Mail Extensions (S/MIME) does build on the encoding format of the Multipurpose Internet Mail Extensions (MIME) protocol and uses public key cryptosystems to secure e-mail messages with digital signatures.

Question 16

____ is the information used in conjunction with an algorithm to create the ciphertext from the plaintext or derive the plaintext from the ciphertext.
A)Password
B)Cipher
C)Key
D)Passphrase

Accepted Answer

The key is used in conjunction with an algorithm to create the ciphertext from the plaintext or derive the plaintext from the ciphertext. A password or passphrase may be used to generate a key, but they are not used directly in the encryption or decryption process. A cipher is the specific algorithm used for encryption or decryption.

Question 17

In a(n)word attack,the attacker encrypts every word in a dictionary using the same cryptosystem as used by the target._________________________

Accepted Answer

dictionary

Question 18

A(n)man-in-the-middle attack attempts to intercept a public key or even to insert a known key structure in place of the requested public key._________________________

Accepted Answer

A man-in-the-middle attack refers to an attacker intercepting communication between two parties and potentially altering it. In the case of public key exchange, the attacker may attempt to intercept the public key being sent and either insert their own key or modify the public key to be a known key that they have access to. This allows the attacker to potentially decrypt and manipulate any future communication between the two parties.

Question 19

____ is the entire range of values that can possibly be used to construct an individual key.
A)Code
B)Keyspace
C)Algorithm
D)Cryptogram

Accepted Answer

The term "keyspace" refers to the range or set of all possible values that can be used to create a cryptographic key. This can include any combination of letters, numbers, symbols, or other characters, depending on the specific encryption algorithm being used. The larger the keyspace, the more secure the encryption is likely to be, as it becomes increasingly difficult for an attacker to guess or brute-force the correct key.

Question 20

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

Accepted Answer

The answer of Diffie-Hellman key exchange uses asymmetric encryption to...

Quiz 8: Cryptography