Cryptography / Encryption - Digital Signature, Public key infrastructure, Tools and techniques of cryptography: Link1
Introduction To Cyber Security-Cryptography MCQ & Answers
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Q.1. Messages were first encrypted in an ancient ----------
A. India
B. China
C. Egypt D. Saudi Arabia
Q.2. -------- is a message that has to be transmitted into ciphertext.
A. hash
B. ciphertext
C. key D. plaintext
Q.3. -------- is a process of changing plaintext into ciphertext.-
A. Cryptography
B. Encryption
C. Decryption
D. Cryptanalysis
Q.4. -------is a output after the process of encryption.
A. hash
B. ciphertext
C. plaintext D. key
Q.5. ------------ is a process of changing ciphertext into plaintext.
A. Cryptography
B. Encryption
C. Decryption
D. Cryptanalysis
Q.6. -------is a word, number or phrase used to encryption or decryption.
A. hash
B. ciphertext
C. plaintext
D. key
Q.7. In ------- key cryptography technique single key is used.
A. single
B. double
C. triple
D. none of the above
Q.8. A key pair is used in -------- key cryptography.
A. single
B. public
C. combined
D. hybrid
Q.9. Public and private both keys are used so it is called as ------- key cryptography.
A. symmetric
B. asymmetric
C. multi-symmetric
D. none of the above
Q.10. MPuaximum blic key length is -------- bit.
A. 40
B. 1024
C. 4094
D. 256
Q.11. Secret key length is from ------- bit to ------ bit.
A. 40, 256
B. 1024, 4094
C. 4094, 10024 D. 10, 256
Q.12. ---------is the one of application of cryptography.
A. Message coding
B. Message encryption
C. Message decoding
D. None of the above
Q.13. ------ is a science of breaking codes or ciphers.
A. Cryptography
B. Encryption
C. Decryption
D. Cryptanalysis
Q.14. If message is in --------- then it is difficult to verify the message.
A. digitized image
B. plain English
C. plain Hindi
D. code
Q.15. -------- is a process that takes input of message & returns fixed-size-string.
A. hash
B. hash value
D. hash digest