Question 1

A CtR-based authenticated encryption approach is the most
efficient mode of operation for high-speed packet networks.

Accepted Answer

A) True 
 B)False

Question 2

A brute-force attack on a MAC is easier than a brute-force attack
on a hash function.

Accepted Answer

A) True 
 B)False

Question 3

One approach to constructing a MAC is to use a symmetric block cipher in such a way that it produces a __________ output for a variable length input.

Accepted Answer

The answer of One approach to constructing a MAC is...

Question 4

As with encryption algorithms and hash functions cryptanalytic
attacks on MAC algorithms seek to exploit some property of the
algorithm to perform some attack other than an exhaustive
search.

Accepted Answer

A) True 
 B)False

Question 5

__________ assures that data received are exactly as sent and that the purposed identity of the sender is valid.

Accepted Answer

message au

Question 6

_________ encryption provides authentication among those who share the secret key.

Accepted Answer

A) Message 
B) Asymmetric 
C) Symmetric 
D) Authenticated 
A) Message 
B) Asymmetric 
C) Symmetric 
D) Authenticated

Question 7

Confidentiality can be provided by performing message encryption __________ the MAC algorithm.

Accepted Answer

A) before 
B) before or after 
C) after 
D) during 
A) before 
B) before or after 
C) after 
D) during

Question 8

Any modification to a sequence of messages between parties, including insertion, deletion, and reordering is a __________ attack.

Accepted Answer

sequence m

Question 9

to attack MD5, the attacker can choose any set of messages and
work on these offline on a dedicated computing facility to find a
collision.

Accepted Answer

A) True 
 B)False

Question 10

"Release of message contents to any person or process not possessing the appropriate cryptographic key" is a __________ attack.

Accepted Answer

A) content modification 
B) source repudiation 
C) disclosure D.sequence modification 
A) content modification 
B) source repudiation 
C) disclosure D.sequence modification

Question 11

A recipient in possession of the secret key cannot generate an
authentication code to verify the integrity of the message.

Accepted Answer

A) True 
 B)False

Question 12

Message authentication is a mechanism or service used to verify
the integrity of a message.

Accepted Answer

A) True 
 B)False

Question 13

the __________ mode of operation was standardized by NISt specifically to support the security requirements of IEEE 802.1 WiFi wireless local area networks but can be used in any networking application requiring authenticated encryption.

Accepted Answer

Counter with Cipher

Question 14

Message authentication may also verify sequencing and timeliness.

Accepted Answer

A) True 
 B)False

Question 15

the straightforward use of public-key encryption provides
confidentiality and authentication.

Accepted Answer

A) True 
 B)False

Question 16

When an entire message is encrypted for confidentiality using either symmetric or asymmetric encryption the security of the scheme generally depends on the __________ of the key.

Accepted Answer

The answer of When an entire message is encrypted for...

Question 17

the security of any MAC function based on an embedded hash
function depends in some way on the cryptographic strength of
the underlying hash function.

Accepted Answer

A) True 
 B)False

Question 18

Message encryption by itself cannot provide a measure of
authentication.

Accepted Answer

A) True 
 B)False

Question 19

Insertion of messages into the network from a fraudulent source is a __________ attack.

Accepted Answer

A) content modification 
B) masquerade 
C) source repudiation 
D) sequence modification 
A) content modification 
B) masquerade 
C) source repudiation 
D) sequence modification

Question 20

NISt SP 800-90, IEEE 802.11i, and tLS/WtLS are three ____________ based on HMAC.

Accepted Answer

pseudorand

A CtR-based authenticated encryption approach is the most efficient mode of operation for high-speed packet networks.

A brute-force attack on a MAC is easier than a brute-force attack on a hash function.

One approach to constructing a MAC is to use a symmetric block cipher in such a way that it produces a __________ output for a variable length input.

As with encryption algorithms and hash functions cryptanalytic attacks on MAC algorithms seek to exploit some property of the algorithm to perform some attack other than an exhaustive search.

__________ assures that data received are exactly as sent and that the purposed identity of the sender is valid.

_________ encryption provides authentication among those who share the secret key.

Confidentiality can be provided by performing message encryption __________ the MAC algorithm.

Any modification to a sequence of messages between parties, including insertion, deletion, and reordering is a __________ attack.

to attack MD5, the attacker can choose any set of messages and work on these offline on a dedicated computing facility to find a collision.

"Release of message contents to any person or process not possessing the appropriate cryptographic key" is a __________ attack.

A recipient in possession of the secret key cannot generate an authentication code to verify the integrity of the message.

Message authentication is a mechanism or service used to verify the integrity of a message.

the __________ mode of operation was standardized by NISt specifically to support the security requirements of IEEE 802.1 WiFi wireless local area networks but can be used in any networking application requiring authenticated encryption.

Message authentication may also verify sequencing and timeliness.

the straightforward use of public-key encryption provides confidentiality and authentication.

When an entire message is encrypted for confidentiality using either symmetric or asymmetric encryption the security of the scheme generally depends on the __________ of the key.

the security of any MAC function based on an embedded hash function depends in some way on the cryptographic strength of the underlying hash function.

Message encryption by itself cannot provide a measure of authentication.

Insertion of messages into the network from a fraudulent source is a __________ attack.

NISt SP 800-90, IEEE 802.11i, and tLS/WtLS are three ____________ based on HMAC.

Computer and Network Security Concepts

Introduction to Number Theory

Classical Encryption Techniques

Advanced Encryption Standard

Block Cipher Operation

Random Bit Generation and Stream Ciphers

Public-Key Cryptography and Rsa

Other Public-Key Cryptosystems

Cryptographic Hash Functions

Digital Signatures

Lightweight Cryptography and Post-Quantum Cryptography

Cryptographic Key Management and Distribution

User Authentication

Wireless Network Security

Electronic Mail Security

Ip Security

Network Endpoint Security

Cloud Security

Internet of Things Iot Security

Filters

Exam 12: Message Authentication Codes

A CtR-based authenticated encryption approach is the most efficient mode of operation for high-speed packet networks.

A brute-force attack on a MAC is easier than a brute-force attack on a hash function.

One approach to constructing a MAC is to use a symmetric block cipher in such a way that it produces a __________ output for a variable length input.

As with encryption algorithms and hash functions cryptanalytic attacks on MAC algorithms seek to exploit some property of the algorithm to perform some attack other than an exhaustive search.

__________ assures that data received are exactly as sent and that the purposed identity of the sender is valid.

_________ encryption provides authentication among those who share the secret key.

Confidentiality can be provided by performing message encryption __________ the MAC algorithm.

Any modification to a sequence of messages between parties, including insertion, deletion, and reordering is a __________ attack.

to attack MD5, the attacker can choose any set of messages and work on these offline on a dedicated computing facility to find a collision.

"Release of message contents to any person or process not possessing the appropriate cryptographic key" is a __________ attack.

A recipient in possession of the secret key cannot generate an authentication code to verify the integrity of the message.

Message authentication is a mechanism or service used to verify the integrity of a message.

the __________ mode of operation was standardized by NISt specifically to support the security requirements of IEEE 802.1 WiFi wireless local area networks but can be used in any networking application requiring authenticated encryption.

Message authentication may also verify sequencing and timeliness.

the straightforward use of public-key encryption provides confidentiality and authentication.

When an entire message is encrypted for confidentiality using either symmetric or asymmetric encryption the security of the scheme generally depends on the __________ of the key.

the security of any MAC function based on an embedded hash function depends in some way on the cryptographic strength of the underlying hash function.

Message encryption by itself cannot provide a measure of authentication.

Insertion of messages into the network from a fraudulent source is a __________ attack.

NISt SP 800-90, IEEE 802.11i, and tLS/WtLS are three ____________ based on HMAC.

Computer and Network Security Concepts

Introduction to Number Theory

Classical Encryption Techniques

Advanced Encryption Standard

Block Cipher Operation

Random Bit Generation and Stream Ciphers

Public-Key Cryptography and Rsa

Other Public-Key Cryptosystems

Cryptographic Hash Functions

Digital Signatures

Lightweight Cryptography and Post-Quantum Cryptography

Cryptographic Key Management and Distribution

User Authentication

Wireless Network Security

Electronic Mail Security

Ip Security

Network Endpoint Security

Cloud Security

Internet of Things Iot Security

Filters