Question 1

__________ 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) An algorithm 
C) A key
D) Work factor

Accepted Answer

Work factor is a term that refers to the number of resources required to carry out a specific task. In the context of cryptography, the work factor is the amount of effort (usually measured in time or computational power) required to decrypt a message when the key or algorithm is not known. Therefore, the correct answer is D. Codes, algorithms, and keys are all relevant to cryptography, but they do not directly relate to the work factor.

Question 2

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

Accepted Answer

resolution

Question 3

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

PGP does indeed use the freeware ZIP algorithm to compress the message after it has been digitally signed but before it is encrypted.

Question 4

The application header (AH) protocol provides secrecy for the contents of network communications as well as system-to-system authentication and data integrity verification. _________________________

Accepted Answer

encapsulating security payload (ESP), encapsulating security payload, ESP

Question 5

UltraViolet wireless (UVW) is a de facto industry standard for short-range wireless communications between devices. _________________________

Accepted Answer

Bluetooth

Question 6

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 techniques that involve hiding information within digital images are becoming more popular due to the widespread use of images in electronic communication and the ease with which digital images can be manipulated without being detected.

Question 7

Within a PKI, a(n)registration authority issues, manages, authenticates, signs, and revokes users' digital certificates, which typically contain the user name, public key, and other identifying information. _________________________

Accepted Answer

certificate

Question 8

S-HTTP is an extended version of Hypertext Transfer Protocol that provides for the encryption of protected e-mail transmitted via the Internet between a client and server. _________________________

Accepted Answer

Web pages

Question 9

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

Accepted Answer

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

Question 10

__________ is the entire range of values that can possibly be used to construct an individual key.
A) Code
B) Keyspace 
C) An algorithm
D) A cryptogram

Accepted Answer

Keyspace refers to the entire range of possible values that can be used to create a key. This includes all of the different characters, symbols, and numbers that can be used to construct a key. The larger the keyspace, the harder it is for an attacker to guess or brute-force the correct key.

Question 11

A __________ 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

A 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 can be used to generate a key, but the key itself is the actual information used in the encryption process. A cipher refers to the specific encryption algorithm used.

Question 12

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 pieces of information, such as the name of the entity, organization, and location. It is used to identify a certificate entity to a user's public key.

Question 13

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 14

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

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

Question 15

__________ 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 an original message or data into a form that is unreadable to unauthorized individuals. It is a technique used to protect sensitive information from being accessed by unauthorized users. In encryption, the original message, known as plaintext, is converted into ciphertext using an encryption algorithm and a secret key. Only authorized individuals who possess the key can decrypt the ciphertext back to the original plaintext. Decryption is the opposite process of converting ciphertext back to plaintext. Cryptography is the study of techniques used for secure communication, whereas cryptology encompasses both cryptography and cryptanalysis (the study of analyzing and breaking cryptographic systems).

Question 16

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

Accepted Answer

XOR, also known as exclusive OR, is commonly used in bit stream methods as it allows for the comparison of two binary values and returns a value of 1 only if the two values being compared are different. This makes it a valuable tool for creating encryption and decryption algorithms. The other options, NOR and OR, are not commonly used in bit stream methods.

Question 17

The Digital Signature Standard established by NIST is used for electronic document authentication by federal information systems. It is based on a variant of the ElGamal algorithm. _________________________

Accepted Answer

The statement is true. The Digital Signature Standard (DSS) established by NIST is based on the ElGamal algorithm variant, which is used for electronic document authentication by federal information systems.

Question 18

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

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 19

Symmetric encryption uses two different but related keys, and either key can be used to encrypt or decrypt the message. _________________________

Accepted Answer

Asymmetric

Question 20

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

Accepted Answer

IPsec provides security features such as encryption, authentication, and data integrity at the IP packet level, which ensures the confidentiality, integrity, and authenticity of the data being transmitted.

Quiz 8: Cryptography

__________ 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.