Question 1

On average, half of all possible keys must be tried to achieve
success with a brute-force attack.

Accepted Answer

A) True 
 B)False

Question 2

If both sender and receiver use the same key, the system is referred to as:

Accepted Answer

A)  public-key encryption 
B)  two-key 
C)  asymmetric 
D)  conventional encryption 
A)  public-key encryption 
B)  two-key 
C)  asymmetric 
D)  conventional encryption

Question 3

the most widely used cipher is the Data Encryption Standard.

Accepted Answer

A) True 
 B)False

Question 4

the process of converting from plaintext to ciphertext is known as
deciphering or decryption.

Accepted Answer

A) True 
 B)False

Question 5

Joseph Mauborgne proposed an improvement to the Vernam cipher that uses a random key that is as long as the message so that the key does not need to be repeated.the key is used to encrypt and decrypt a single message and then is discarded.Each new message requires a new key of the same length as the new message.this scheme is known as a(n) __________ .

Accepted Answer

A)  pascaline 
B)  one-time pad 
C)  polycipher 
D)  enigma 
A)  pascaline 
B)  one-time pad 
C)  polycipher 
D)  enigma

On average, half of all possible keys must be tried to achieve success with a brute-force attack.

If both sender and receiver use the same key, the system is referred to as:

the most widely used cipher is the Data Encryption Standard.

the process of converting from plaintext to ciphertext is known as deciphering or decryption.

Computer and Network Security Concepts

Introduction to Number Theory

Advanced Encryption Standard

Block Cipher Operation

Random Bit Generation and Stream Ciphers

Public-Key Cryptography and Rsa

Other Public-Key Cryptosystems

Cryptographic Hash Functions

Message Authentication Codes

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 3: Classical Encryption Techniques

On average, half of all possible keys must be tried to achieve success with a brute-force attack.

If both sender and receiver use the same key, the system is referred to as:

the most widely used cipher is the Data Encryption Standard.

the process of converting from plaintext to ciphertext is known as deciphering or decryption.

Computer and Network Security Concepts

Introduction to Number Theory

Advanced Encryption Standard

Block Cipher Operation

Random Bit Generation and Stream Ciphers

Public-Key Cryptography and Rsa

Other Public-Key Cryptosystems

Cryptographic Hash Functions

Message Authentication Codes

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