# Welcome to the Public Key Cryptography and RSA MCQs Page

Dive deep into the fascinating world of Public Key Cryptography and RSA with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Public Key Cryptography and RSA, a crucial aspect of Cryptography and Network Security. In this section, you will encounter a diverse range of MCQs that cover various aspects of Public Key Cryptography and RSA, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Cryptography and Network Security.

Check out the MCQs below to embark on an enriching journey through Public Key Cryptography and RSA. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Cryptography and Network Security.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Public Key Cryptography and RSA. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

### Public Key Cryptography and RSA MCQs | Page 1 of 4

Q1.
“Rabin Cryptosystem is a variant of the Elgamal Cryptosystem”
Q2.
Using Rabin cryptosystem with p=23 and q=7, Encrypt P=24 to find ciphertext. The Cipher text is
Q3.
Which Cryptographic system uses C1 = (e1^r) mod p and C1 = (e2^r x P) mod p at the encryption side?
Q4.
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).
Q5.
In Elgamal cryptosystem, given the prime p=31. Choose e1= first primitive root of p and d=10, calculate e2.
Q6.
In Elgamal cryptosystem, given the prime p=31. Encrypt the message “HELLO”; use 00 to 25 for encoding. The value of C2 for character ‘L’ is
Q7.
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
Q8.
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