Public Key Cryptography MCQ Questions And Answers

This section focuses on "Public Key Cryptography" in Blockchain. These Multiple Choice Questions (MCQ) should be practiced to improve the Blockchain skills required for various interviews (campus interviews, walk-in interviews, company interviews), placements, entrance exams and other competitive examinations.

1. Public-key cryptography is also known as ?

A. asymmetric cryptography
B. symmetric cryptography
C. Both A and B
D. None of the above

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2. Which of the following keys are known only to the owner?

A. public key
B. protected key
C. private key
D. unique key

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3. How many function PKI accomplies?

A. 1
B. 2
C. 3
D. 4

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4. PKI stands for?

A. public key infrastructure
B. private key infrastructure
C. public key instance
D. private key instance

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5. A communication is said to be insecure where data is transmitted in a manner that allows for interception also called?

A. attack
B. sniffing
C. ISP
D. citation

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6. Knapsack problem can be solved by

A. Public key cryptosystem
B. Private key cryptosystem
C. Both A and B
D. Unique key cryptosystem

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7. Examples of hash functions are

A. MD5
B. SHA-1
C. Both A and B
D. None of the above

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8. Which has a key length of 128 bits?

A. IDEA
B. Triple-DES
C. Both A and B
D. RSA

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9. Private key algorithm is used for _____ encryption and public key algorithm is used for _____ encryption.

A. Messages, session key
B. Session key, messages
C. Can be used for both
D. None of the above

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10. In public key cryptosystem which is kept as public?

A. Decryption keys
B. Encryption keys
C. Encryption & Decryption keys
D. None of the above

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