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Cryptography Objective Questions and Answers

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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.

1.
Easy 
Which algorithm is symmetric?
2.
Easy 
What does HMAC primarily provide?
3.
Easy 
Which hash function is considered broken due to collisions?
4.
Easy 
Which property ensures that data has not been altered?
5.
Easy 
Which algorithm is used for secure password hashing?
6.
Easy 
Which algorithm is asymmetric?
7.
Easy 
What is the primary purpose of Base64 encoding?
8.
Easy 
Which DES variant applies encryption three times?
9.
Medium 
What does a digital signature primarily provide?
10.
Medium 
Which algorithm is used in JWT signing by default?
11.
Medium 
What is the main weakness of SHA-1?
12.
Medium 
Which encryption mode provides authentication as well?
13.
Medium 
What is the purpose of a salt in password hashing?
14.
Medium 
Which algorithm is used in ChaCha20-Poly1305?
15.
Medium 
Which property ensures a sender cannot deny sending a message?
Answered: 0 / 15

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