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Cryptography Objective Questions and Answers

Practice cryptography objective questions with answers and detailed explanations. Covers AES, RSA, hashing, HMAC, JWT, encryption standards and security basics.

This cryptography quiz contains carefully curated objective questions with correct answers and clear explanations. It is designed for developers, security learners, and interview preparation, covering modern encryption, hashing, authentication, and security best practices.

Practice Cryptography MCQs with Detailed Explanations

Answer at least 12 questions to submit.

16.
Which algorithm is vulnerable to length extension attacks?
Hard
17.
What is the key size of AES-256?
Easy
18.
Which algorithm is commonly used for key exchange?
Medium
19.
What does PBKDF2 stand for?
Medium
20.
Which encryption mode is NOT recommended due to pattern leakage?
Medium
21.
Which algorithm uses elliptic curves?
Easy
22.
What is the main use of Shamir’s Secret Sharing?
Medium
23.
Which algorithm is designed to be fast in software?
Medium
24.
What does a CSR contain?
Easy
25.
Which hashing algorithm produces a 256-bit output?
Easy
26.
What is the purpose of Poly1305?
Medium
27.
Which cryptographic primitive ensures confidentiality?
Easy
28.
Which algorithm is commonly used for file encryption?
Easy
29.
What is the main drawback of DES?
Medium
30.
Which algorithm is recommended for modern TLS?
Medium
Answered: 0 / 15

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