June 12, 2021

Pretty Good Privacy MCQ’s

Read Time:1 Minute, 39 Second

This set of Digital Communications Systems Multiple Choice Questions & Answers (MCQs) focuses on “Pretty Good Privacy”.

1. Data compression includes
a) Removal of redundant character
b) Uniform distribution of characters
c) Removal of redundant character & Uniform distribution of characters
d) None of the mentioned

2. What is the key size allowed in PGP?
a) 1024-1056
b) 1024-4056
c) 1024-4096
d) 1024-2048

3. Pretty good privacy (PGP) security system uses
a) Public key cryptosystem
b) Private key cryptosystem
c) Public & Private key cryptosystem
d) None of the mentioned

4. In hash function output length is fixed.
a) True
b) False

5. PGP offers _____ block ciphers for message encryption.
a) Triple-DES
b) CAST
c) IDEA
d) All of the mentioned

6. These three ciphers can operate of ______ of plaintext and cipher text.
a) 128 bit blocks
b) 64 bit blocks
c) 256 bit blocks
d) 156 bit blocks

7. The digital signature provides authentication to the
a) Sender
b) Message
c) Sender & Message
d) None of the mentioned

8. The key size of DES is
a) 56 bits
b) 64 bits
c) 128 bits
d) 168 bits

9. DSA protocol is based on
a) Discrete logarithm problem
b) Continuous logarithm problem
c) Discrete & Continuous logarithm problem
d) None of the mentioned

10. Public key cryptosystem is used for the encryption of
a) Messages
b) Session key
c) Session key & Messages
d) None of the mentioned

11. The hash function
a) Is collision free
b) Has manageable collision
c) Has high unmanageable level of collision
d) None of the mentioned

12. Which should be used first to decrypt?
a) Public key
b) Private key
c) Public & Private key
d) None of the mentioned

13. Which block cipher has key length of 128 bits?
a) IDEA
b) CAST
c) IDEA & CAST
d) None of the mentioned

14. Which operation is used in encryption using IDEA?
a) Addition modulo 216
b) Bit wise XOR
c) Addition modulo 216 & Bit wise XOR
d) None of the mentioned

15. Which algorithm is used for public key encryption?
a) RSA
b) Diffie-Hellman
c) RSA & Diffie-Hellman
d) None of the mentioned

16. For digital signatures private key cryptosystem is used.
a) True
b) False

Happy
Happy
0 %
Sad
Sad
0 %
Excited
Excited
0 %
Sleepy
Sleepy
0 %
Angry
Angry
0 %
Surprise
Surprise
0 %

Average Rating

5 Star
0%
4 Star
0%
3 Star
0%
2 Star
0%
1 Star
0%

Leave a Reply

Your email address will not be published. Required fields are marked *

Previous post Public Key Cryptosystems – 2 MCQ’s
Next post Quantization – 1 MCQ’s