McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Uncategorized topics .
| 101. |
In Elgamal cryptosystem, given the prime p=31,What is the respective plaintext character for C = (27, 20)? |
| A. | h |
| B. | l |
| C. | o |
| D. | m |
| Answer» A. h | |
| 102. |
How many real and imaginary roots does the equation y2=x3-1 have |
| A. | 2 real, 1 imaginary |
| B. | all real |
| C. | all imaginary |
| D. | 2 imaginary, 1 real |
| Answer» D. 2 imaginary, 1 real | |
| 103. |
“In ECC, the inverse of point P =(x1, y1) is Q = (-x1, y1). “ |
| A. | true |
| B. | false |
| Answer» B. false | |
| 104. |
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)? |
| A. | (15, -56) |
| B. | (-23, -43) |
| C. | (69, 26) |
| D. | (12, -86) |
| Answer» A. (15, -56) | |
| 105. |
How many real and imaginary roots does the equation y2=x3-4x have |
| A. | 2 real, 1 imaginary |
| B. | all real |
| C. | all imaginary |
| D. | 2 imaginary, 1 real |
| Answer» B. all real | |
| 106. |
In the elliptic curve group defined by y2= x3- 17x + 16 over real numbers, what is 2P if P = (4, 3.464) |
| A. | (12.022, -39.362) |
| B. | (32.022, 42.249) |
| C. | (11.694, -43.723) |
| D. | (43.022, 39.362) |
| Answer» A. (12.022, -39.362) | |
| 107. |
In public key cryptosystem keys are used for encryption and decryption. |
| A. | same |
| B. | different |
| C. | encryption keys |
| D. | none of the mentioned |
| Answer» B. different | |
| 108. |
PGP system uses |
| A. | private key system |
| B. | public key system |
| C. | private & public key system |
| D. | none of the mentioned |
| Answer» C. private & public key system | |
| 109. |
Knapsack problem can be solved by |
| A. | public key cryptosystem |
| B. | public key system |
| C. | private & public key system |
| D. | none of the mentioned |
| Answer» A. public key cryptosystem | |
| 110. |
Merkle hellman is a symmetric cryptosystem. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 111. |
In public key cryptosystem which is kept as public? |
| A. | encryption keys |
| B. | decryption keys |
| C. | encryption & decryption keys |
| D. | none of the mentioned |
| Answer» A. encryption keys | |
| 112. |
A cryptographic hash function has variable output length. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 113. |
In a trapdoor function, the functions are easy to go in |
| A. | one direction |
| B. | two directions |
| C. | all directions |
| D. | none of the mentioned |
| Answer» A. one direction | |
| 114. |
Which algorithm can be used to sign a message? |
| A. | public key algorithm |
| B. | private key algorith |
| C. | public & private key algorithm |
| D. | none of the mentioned |
| Answer» A. public key algorithm | |
| 115. |
In this Merkle Hellman method same key is used for encryption and decryption. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 116. |
A set of numbers is called as super increasing if |
| 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 |
| Answer» B. each element greater than sum of all the previous elements | |
| 117. |
There are major ways of stealing email information. |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» B. 3 | |
| 118. |
Which of them is not a major way of stealing email information? |
| A. | stealing cookies |
| B. | reverse engineering |
| C. | password phishing |
| D. | social engineering |
| Answer» B. reverse engineering | |
| 119. |
is the method for keeping sensitive information in email communication & accounts secure against unofficial access, loss, or compromise. |
| A. | email security |
| B. | email hacking |
| C. | email protection |
| D. | email safeguarding |
| Answer» A. email security | |
| 120. |
is a famous technological medium for the spread of malware, facing problems of spam, & phishing attacks. |
| A. | cloud |
| B. | pen drive |
| C. | website |
| D. | |
| Answer» D. email | |
| 121. |
Fraudulent email messages are some fake email messages that seem legitimate which asks for your confidential bank details such as details and passwords. |
| A. | credit card, antivirus name |
| B. | credit card, login id |
| C. | cell phone, antivirus name |
| D. | car model, account id |
| Answer» B. credit card, login id | |
| 122. |
Unsolicited Bulk E-mails (UBI) are called |
| A. | sms |
| B. | mms |
| C. | spam emails |
| D. | malicious emails |
| Answer» C. spam emails | |
| 123. |
Using email hacking illicit hackers can send & spread virus and spam emails. |
| A. | trojans, redirected malicious urls |
| B. | antivirus, patches |
| C. | cracked software, redirected malicious urls |
| D. | malware, security patches |
| Answer» A. trojans, redirected malicious urls | |
| 124. |
is the technique used for tricking users to disclose their username and passwords through fake pages. |
| A. | social engineering |
| B. | phishing |
| C. | cookie stealing |
| D. | banner grabbing |
| Answer» B. phishing | |
| 125. |
Which of them is an example of grabbing email information? |
| A. | cookie stealing |
| B. | reverse engineering |
| C. | port scanning |
| D. | banner grabbing |
| Answer» A. cookie stealing | |
| 126. |
Which of the following is a non-technical type of intrusion or attack technique? |
| A. | reverse engineering |
| B. | malware analysis |
| C. | social engineering |
| D. | malware writing |
| Answer» C. social engineering | |
| 127. |
If the data stored in the is not encrypted, then after cookie stealing, attackers can see information such as username and password stored by the cookie. |
| A. | memory |
| B. | quarantine |
| C. | cookies |
| D. | hard drive |
| Answer» C. cookies | |
| 128. |
The stored cookie which contains all your personal data about that website can be stolen away by using or trojans. |
| A. | attackers, malware |
| B. | hackers, antivirus |
| C. | penetration testers, malware |
| D. | penetration testers, virus |
| Answer» A. attackers, malware | |
| 129. |
If a website uses a cookie, or a browser contains the cookie, then every time you visit that website, the browser transfers the cookie to that website. |
| A. | true |
| B. | false |
| Answer» A. true | |
| 130. |
Which of them is not a proper method for email security? |
| A. | use strong password |
| B. | use email encryption |
| C. | spam filters and malware scanners |
| D. | click on unknown links to explore |
| Answer» D. click on unknown links to explore | |
| 131. |
What are email security services? |
| A. | confidentiality |
| B. | authentication |
| C. | non-repudation of origin |
| D. | all of the above |
| Answer» D. all of the above | |
| 132. |
PGP security system uses |
| A. | public key cryptosystem |
| B. | private key cryptosystem |
| C. | public & private key cryptosystem |
| D. | none of the mentioned |
| Answer» C. public & private key cryptosystem | |
| 133. |
What is the key size allowed in PGP? |
| A. | 1024-1056 |
| B. | 1024-4056 |
| C. | 1024-4096 |
| D. | 1024-2048 |
| Answer» C. 1024-4096 | |
| 134. |
Who created PGP? |
| A. | phil zimmermann |
| B. | tim berners-lee |
| C. | marc andreessen |
| D. | ken thompson |
| Answer» A. phil zimmermann | |
| 135. |
What is the PGP stand for? |
| A. | permuted gap permission |
| B. | permuted great privacy |
| C. | pretty good privacy |
| D. | none of the mentioned |
| Answer» C. pretty good privacy | |
| 136. |
PGP makes use of which cryptographic algorithm? |
| A. | des |
| B. | aes |
| C. | rsa |
| D. | rabin |
| Answer» C. rsa | |
| 137. |
PGP offers block ciphers for message encryption? |
| A. | triple-des |
| B. | cast |
| C. | idea |
| D. | all of the above |
| Answer» D. all of the above | |
| 138. |
S/MIME stands for . |
| A. | standard multipurpose internet mail extensions. |
| B. | secure multipurpose internet mail extensions. |
| C. | secure multipurpose international mail extensions |
| D. | standard multipurpose international mail extensions. |
| Answer» B. secure multipurpose internet mail extensions. | |
| 139. |
is used for hiding the payment information from the merchant. |
| A. | set. |
| B. | ssl. |
| C. | shttp |
| D. | tsp |
| Answer» A. set. | |
| 140. |
The cryptography algorithms used in S/MIME are . |
| A. | idea. |
| B. | rc4 |
| C. | rsa,des-3 |
| D. | rc5 |
| Answer» C. rsa,des-3 | |
| 141. |
In S/MIME,MLA stands for . |
| A. | mailing list agent. |
| B. | multipurpose list agent. |
| C. | mail lock agent. |
| D. | message link agen |
| Answer» A. mailing list agent. | |
| 142. |
Which component is included in IP security? |
| A. | authentication header (ah) |
| B. | encapsulating security payload (esp) |
| C. | internet key exchange (ike) |
| D. | all of the mentioned |
| Answer» A. authentication header (ah) | |
| 143. |
WPA2 is used for security in |
| A. | ethernet |
| B. | bluetooth |
| C. | wi-fi |
| D. | |
| Answer» C. wi-fi | |
| 144. |
An attempt to make a computer resource unavailable to its intended users is called |
| A. | denial-of-service attack |
| B. | virus attack |
| C. | worms attack |
| D. | botnet process |
| Answer» A. denial-of-service attack | |
| 145. |
PGP is used in |
| A. | browser security |
| B. | email security |
| C. | ftp security |
| D. | wifi security |
| Answer» B. email security | |
| 146. |
In tunnel mode, IPSec protects the |
| A. | entire ip packet |
| B. | ip header |
| C. | ip payload |
| D. | ip trailer |
| Answer» A. entire ip packet | |
| 147. |
IPSec is designed to provide security at the |
| A. | transport layer |
| B. | network layer |
| C. | application layer |
| D. | session layer |
| Answer» B. network layer | |
| 148. |
Which of the following is not a strong security protocol? |
| A. | https |
| B. | ssl |
| C. | smtp |
| D. | sftp |
| Answer» C. smtp | |
| 149. |
SSL primarily focuses on |
| A. | integrity and authenticity |
| B. | integrity and non-repudiation |
| C. | authenticity and privacy |
| D. | confidentiality and integrity |
| Answer» A. integrity and authenticity | |
| 150. |
Why did SSL certificate require in HTTP? |
| A. | for making security weak |
| B. | for making information move faster |
| C. | for encrypted data sent over http protocol |
| D. | for sending and receiving emails unencrypted |
| Answer» C. for encrypted data sent over http protocol | |
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