Question 1

What is the general equation for elliptic curve systems

Accepted Answer

A) y3+b_1 xy+b_2 y=x33+a_1 x2+a_2 x+a_3 
B) y3+b_1 x+b_2 y=x2+a_1 x2+a_2 x+a_3 
C) y2+b_1 xy+b_2 y=x3+a_1 x2+a_2 
D) y2+b_1 xy+b_2 y=x3+a_1 x2+a_2 x+a_3 
A) y3+b_1 xy+b_2 y=x33+a_1 x2+a_2 x+a_3 
B) y3+b_1 x+b_2 y=x2+a_1 x2+a_2 x+a_3 
C) y2+b_1 xy+b_2 y=x3+a_1 x2+a_2 
D) y2+b_1 xy+b_2 y=x3+a_1 x2+a_2 x+a_3 D

Question 2

For RSA to work, the value of P must be less than the value of

Accepted Answer

A) p 
B) q 
C) n 
D) f 
A) p 
B) q 
C) n 
D) f C

Question 3

The man-in-the-middle attack can endanger the security of the Diffie-Hellman method if two parties are not

Accepted Answer

A) authenticated 
B) joined 
C) submit 
D) separate 
A) authenticated 
B) joined 
C) submit 
D) separate A

Question 4

What is the block size of RC6 Feistel block cipher?

Accepted Answer

A) 5013 bits 
B) 128 bits 
C) 596 bits 
D) 1768 bits 
A) 5013 bits 
B) 128 bits 
C) 596 bits 
D) 1768 bits

Question 5

Till when was the RC4 algorithm kept a secret?

Accepted Answer

A) 1990 
B) 1992 
C) 1996 
D) 1994 
A) 1990 
B) 1992 
C) 1996 
D) 1994

Question 6

In Elgamal cryptosystem, given the prime p=31,Choose e1= first primitive root of p and d=10, calculate e2

Accepted Answer

A) 24 
B) 36 
C) 25 
D) 62 
A) 24 
B) 36 
C) 25 
D) 62

Question 7

In RSA, ?(n) = in terms of p and q

Accepted Answer

A) (p)/(q) 
B) (p)(q) 
C) (p-1)(q-1) 
D) (p+1)(q+1) 
A) (p)/(q) 
B) (p)(q) 
C) (p-1)(q-1) 
D) (p+1)(q+1)

Question 8

USENET falls under which category of public key sharing?

Accepted Answer

A) public announcement 
B) publicly available directory 
C) public-key authority 
D) public-key certificates 
A) public announcement 
B) publicly available directory 
C) public-key authority 
D) public-key certificates

Question 9

Elliptic curve cryptography follows the associative property

Accepted Answer

A) True 
 B)False

Question 10

RSA is also a stream cipher like Merkel-Hellman

Accepted Answer

A) True 
 B)False

Question 11

How many bytes of the secret key is generated using Diffie-Hellman encryption/decryption scheme?

Accepted Answer

A) 256 
B) 871 
C) 1024 
D) 962 
A) 256 
B) 871 
C) 1024 
D) 962

Question 12

Computation of the discrete logarithm is the basis of the cryptographic system

Accepted Answer

A) symmetric cryptography 
B) asymmetric cryptography 
C) diffie-hellman key exchange 
D) secret key cryptography 
A) symmetric cryptography 
B) asymmetric cryptography 
C) diffie-hellman key exchange 
D) secret key cryptography

Question 13

Sender chooses p = 107, e1 = 2, d = 67, and the random integer is r=45. Find the plaintext to be transmitted if the ciphertext is (28,9)

Accepted Answer

A) 45 
B) 76 
C) 66 
D) 13 
A) 45 
B) 76 
C) 66 
D) 13

Question 14

Session keys are transmitted after being encrypted by

Accepted Answer

A) make-shift keys 
B) temporary keys 
C) master keys 
D) section 
A) make-shift keys 
B) temporary keys 
C) master keys 
D) section

Question 15

Which of the following is not a type of symmetric-key cryptography technique?

Accepted Answer

A) caesar cipher 
B) data encryption standard (des) 
C) diffie hellman cipher 
D) playfair cipher 
A) caesar cipher 
B) data encryption standard (des) 
C) diffie hellman cipher 
D) playfair cipher

Question 16

In Elgamal cryptosystem, given the prime p=31,Encrypt the message "HELLO"; use 00 to 25 for encoding. The value of C2 for character 'O' is

Accepted Answer

A) 9 
B) 7 
C) 23 
D) 27 
A) 9 
B) 7 
C) 23 
D) 27

Question 17

The certificate message is required for any agreed-on key exchange method except

Accepted Answer

A) ephemeral diffie- hellman 
B) anonymous diffie- hellmanc 
C) fixed diffie- hellmand. 
D) rsa 
A) ephemeral diffie- hellman 
B) anonymous diffie- hellmanc 
C) fixed diffie- hellmand. 
D) rsa

Question 18

In Asymmetric key Cryptography, although RSA can be used to encrypt and decrypt actual messages, it is very slow if the message is

Accepted Answer

A) short 
B) long 
C) flat 
D) thin 
A) short 
B) long 
C) flat 
D) thin

Question 19

The Plaintext for the Ciphertext 00100010, given that the key is 1111111111 is

Accepted Answer

A) 1100111 
B) 1010 
C) 1001000 
D) 1001100 
A) 1100111 
B) 1010 
C) 1001000 
D) 1001100

Question 20

Using Rabin cryptosystem with p=23 and q=7 ,Encrypt P=24 to find ciphertext. The Cipher text is

Accepted Answer

A) 42 
B) 93 
C) 74 
D) 12 
A) 42 
B) 93 
C) 74 
D) 12

What is the general equation for elliptic curve systems

For RSA to work, the value of P must be less than the value of

The man-in-the-middle attack can endanger the security of the Diffie-Hellman method if two parties are not

What is the block size of RC6 Feistel block cipher?

Till when was the RC4 algorithm kept a secret?

In Elgamal cryptosystem, given the prime p=31,Choose e1= first primitive root of p and d=10, calculate e2

In RSA, ?(n) = in terms of p and q

USENET falls under which category of public key sharing?

Elliptic curve cryptography follows the associative property

RSA is also a stream cipher like Merkel-Hellman

How many bytes of the secret key is generated using Diffie-Hellman encryption/decryption scheme?

Computation of the discrete logarithm is the basis of the cryptographic system

Sender chooses p = 107, e1 = 2, d = 67, and the random integer is r=45. Find the plaintext to be transmitted if the ciphertext is (28,9)

Session keys are transmitted after being encrypted by

Which of the following is not a type of symmetric-key cryptography technique?

In Elgamal cryptosystem, given the prime p=31,Encrypt the message "HELLO"; use 00 to 25 for encoding. The value of C2 for character 'O' is

The certificate message is required for any agreed-on key exchange method except

In Asymmetric key Cryptography, although RSA can be used to encrypt and decrypt actual messages, it is very slow if the message is

The Plaintext for the Ciphertext 00100010, given that the key is 1111111111 is

Using Rabin cryptosystem with p=23 and q=7 ,Encrypt P=24 to find ciphertext. The Cipher text is

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Exam 4: Cryptography and Encryption Techniques

What is the general equation for elliptic curve systems

For RSA to work, the value of P must be less than the value of

The man-in-the-middle attack can endanger the security of the Diffie-Hellman method if two parties are not

What is the block size of RC6 Feistel block cipher?

Till when was the RC4 algorithm kept a secret?

In Elgamal cryptosystem, given the prime p=31,Choose e1= first primitive root of p and d=10, calculate e2

In RSA, ?(n) = in terms of p and q

USENET falls under which category of public key sharing?

Elliptic curve cryptography follows the associative property

RSA is also a stream cipher like Merkel-Hellman

How many bytes of the secret key is generated using Diffie-Hellman encryption/decryption scheme?

Computation of the discrete logarithm is the basis of the cryptographic system

Sender chooses p = 107, e1 = 2, d = 67, and the random integer is r=45. Find the plaintext to be transmitted if the ciphertext is (28,9)

Session keys are transmitted after being encrypted by

Which of the following is not a type of symmetric-key cryptography technique?

In Elgamal cryptosystem, given the prime p=31,Encrypt the message "HELLO"; use 00 to 25 for encoding. The value of C2 for character 'O' is

The certificate message is required for any agreed-on key exchange method except

In Asymmetric key Cryptography, although RSA can be used to encrypt and decrypt actual messages, it is very slow if the message is

The Plaintext for the Ciphertext 00100010, given that the key is 1111111111 is

Using Rabin cryptosystem with p=23 and q=7 ,Encrypt P=24 to find ciphertext. The Cipher text is

Cryptography and Network Security

Cryptography and Encryption

Cryptography Key, Algorithm, and Mode of Operation

Cryptography, Elliptic Curves, and Email Security

Intrusion and Emailinternet Security Techniques

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

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