Question 1

_________is the method for keeping sensitive information in email communication & accounts secure against unofficial access, loss, or compromise.

Accepted Answer

A)  email security
B)  email hacking
C)  email protection
D)  email safeguarding A

Question 2

PGP system uses

Accepted Answer

A)  private key system
B)  public key system
C)  private & public key system
D)  none of the mentioned

Question 3

In public key cryptosystem_______ keys are used for encryption and decryption.

Accepted Answer

A)  same
B)  different
C)  encryption keys
D)  none of the mentioned B

Question 4

Which of them is an example of grabbing email information?

Accepted Answer

A)  cookie stealing
B)  reverse engineering
C)  port scanning
D)  banner grabbing

Question 5

In Elgamal cryptosystem, given the prime p=31,What is the respective plaintext character for C = (27, 20) ?

Accepted Answer

A)  h
B)  l
C)  o
D)  m

Question 6

There are________major ways of stealing email information.

Accepted Answer

A)  2
B)  3
C)  4
D)  5

Question 7

Which of them is not a major way of stealing email information?

Accepted Answer

A)  stealing cookies
B)  reverse engineering
C)  password phishing
D)  social engineering

Question 8

In a trapdoor function, the functions are easy to go in

Accepted Answer

A)  one direction
B)  two directions
C)  all directions
D)  none of the mentioned

Question 9

A set of numbers is called as super increasing if

Accepted Answer

A)  each element is greater than previous element
B)  each element greater than sum of all the previous elements
C)  each element greater than the average of all elements
D)  each element lesser than the sum of all the elements

Question 10

------------ is the technique used for tricking users to disclose their username and passwords through fake pages.

Accepted Answer

A)  social engineering
B)  phishing
C)  cookie stealing
D)  banner grabbing

Question 11

A cryptographic hash function has variable output length.

Accepted Answer

A) True 
 B)False

Question 12

In the elliptic curve group defined by y2= x3- 17x + 16 over real numbers, what is 2P if P = (4, 3.464)

Accepted Answer

A)  (12.022, -39.362) 
B)  (32.022, 42.249) 
C)  (11.694, -43.723) 
D)  (43.022, 39.362)

Question 13

How many real and imaginary roots does the equation y2=x3-4x have

Accepted Answer

A)  2 real, 1 imaginary
B)  all real
C)  all imaginary
D)  2 imaginary, 1 real

Question 14

Which algorithm can be used to sign a message?

Accepted Answer

A)  public key algorithm
B)  private key algorith
C)  public & private key algorithm
D)  none of the mentioned

Question 15

Unsolicited Bulk E-mails (UBI)  are called

Accepted Answer

A)  sms
B)  mms
C)  spam emails
D)  malicious emails

Question 16

Fraudulent email messages are some fake email messages that seem legitimate which asks for your confidential bank details such as________details and passwords.

Accepted Answer

A)  credit card, antivirus name
B)  credit card, login id
C)  cell phone, antivirus name
D)  car model, account id

Question 17

Using email hacking illicit hackers can send & spread______virus________and spam emails.

Accepted Answer

A)  trojans, redirected malicious urls
B)  antivirus, patches
C)  cracked software, redirected malicious urls
D)  malware, security patches

Question 18

"In ECC, the inverse of point P =(x1, y1) is Q = (-x1, y1). "

Accepted Answer

A) True 
 B)False  False

Question 19

In the elliptic curve group defined by y2= x3- 17x + 16 over real numbers, what is P + Q if P = (0,-4)  and Q = (1, 0) ?

Accepted Answer

A)  (15, -56) 
B)  (-23, -43) 
C)  (69, 26) 
D)  (12, -86)

Question 20

In public key cryptosystem which is kept as public?

Accepted Answer

A)  encryption keys
B)  decryption keys
C)  encryption & decryption keys
D)  none of the mentioned

Exam 5: Cryptography, Elliptic Curves, and Email Security

_________is the method for keeping sensitive information in email communication & accounts secure against unofficial access, loss, or compromise.

Correct AnswerverifiedA

PGP system uses

Correct AnswerverifiedShow Answer

In public key cryptosystem_______ keys are used for encryption and decryption.

Correct AnswerverifiedB

Which of them is an example of grabbing email information?

Correct AnswerverifiedShow Answer

In Elgamal cryptosystem, given the prime p=31,What is the respective plaintext character for C = (27, 20) ?

Correct AnswerverifiedShow Answer

There are________major ways of stealing email information.

Correct AnswerverifiedShow Answer

Which of them is not a major way of stealing email information?

Correct AnswerverifiedShow Answer

In a trapdoor function, the functions are easy to go in

Correct AnswerverifiedShow Answer

A set of numbers is called as super increasing if

Correct AnswerverifiedShow Answer

------------ is the technique used for tricking users to disclose their username and passwords through fake pages.

Correct AnswerverifiedShow Answer

A cryptographic hash function has variable output length.

Correct AnswerverifiedShow Answer

In the elliptic curve group defined by y2= x3- 17x + 16 over real numbers, what is 2P if P = (4, 3.464)

Correct AnswerverifiedShow Answer

How many real and imaginary roots does the equation y2=x3-4x have

Correct AnswerverifiedShow Answer

Which algorithm can be used to sign a message?

Correct AnswerverifiedShow Answer

Unsolicited Bulk E-mails (UBI) are called

Correct AnswerverifiedShow Answer

Fraudulent email messages are some fake email messages that seem legitimate which asks for your confidential bank details such as________details and passwords.

Correct AnswerverifiedShow Answer

Using email hacking illicit hackers can send & spread______virus________and spam emails.

Correct AnswerverifiedShow Answer

"In ECC, the inverse of point P =(x1, y1) is Q = (-x1, y1). "

Correct AnswerverifiedFalse

In the elliptic curve group defined by y2= x3- 17x + 16 over real numbers, what is P + Q if P = (0,-4) and Q = (1, 0) ?

Correct AnswerverifiedShow Answer

In public key cryptosystem which is kept as public?

Correct AnswerverifiedShow Answer

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A

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B

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Using email hacking illicit hackers can send & spreadvirus__and spam emails.

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False

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