Question 1

DES follows

Accepted Answer

A) hash algorithm 
B) caesars cipher 
C) feistel cipher structure 
D) sp networks 
A) hash algorithm 
B) caesars cipher 
C) feistel cipher structure 
D) sp networks

Question 2

The Plaintext for the Ciphertext 10100101, given that the key is 0010010111 is

Accepted Answer

A) 1100111 
B) 110110 
C) 1001000 
D) 1001100 
A) 1100111 
B) 110110 
C) 1001000 
D) 1001100

Question 3

The DES algorithm has a key length of

Accepted Answer

A) 128 bits 
B) 32 bits 
C) 64 bits 
D) 16 bits 
A) 128 bits 
B) 32 bits 
C) 64 bits 
D) 16 bits

Question 4

In affine block cipher systems if f(m)=Am + t, what is f(m1+m2+m3) ?

Accepted Answer

A) f(m1) + f(m2) + f(m3) + t 
B) f(m1) + f(m2) + f(m3) +2t 
C) f(m1) + f(m2) + f(m3) 
D) 2(f(m1) + f(m2) + f(m3)) 
A) f(m1) + f(m2) + f(m3) + t 
B) f(m1) + f(m2) + f(m3) +2t 
C) f(m1) + f(m2) + f(m3) 
D) 2(f(m1) + f(m2) + f(m3))

Question 5

Which of the following is a mode of operation for the Block ciphers in cryptography?

Accepted Answer

A) a. electronic code book (ecb) 
B) cipher block chaining (cbc) 
C) counter (ctr) mode 
D) all of the above 
A) a. electronic code book (ecb) 
B) cipher block chaining (cbc) 
C) counter (ctr) mode 
D) all of the above

DES follows

The Plaintext for the Ciphertext 10100101, given that the key is 0010010111 is

The DES algorithm has a key length of

In affine block cipher systems if f(m)=Am + t, what is f(m1+m2+m3) ?

Which of the following is a mode of operation for the Block ciphers in cryptography?

Cryptography and Network Security

Cryptography and Encryption

Cryptography and Encryption Techniques

Cryptography, Elliptic Curves, and Email Security

Intrusion and Emailinternet Security Techniques

Cybersecurity Concepts: Sftp, Firewall, Malware, and Virus Protection

Filters

Exam 3: Cryptography Key, Algorithm, and Mode of Operation

DES follows

The Plaintext for the Ciphertext 10100101, given that the key is 0010010111 is

The DES algorithm has a key length of

In affine block cipher systems if f(m)=Am + t, what is f(m1+m2+m3) ?

Which of the following is a mode of operation for the Block ciphers in cryptography?

Cryptography and Network Security

Cryptography and Encryption

Cryptography and Encryption Techniques

Cryptography, Elliptic Curves, and Email Security

Intrusion and Emailinternet Security Techniques

Cybersecurity Concepts: Sftp, Firewall, Malware, and Virus Protection

Filters