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MCA Cyber Security Cryptography — practice questions — page 2

Explore 38 free Cryptography questions in MCA Cyber Security Cybersecurity. Open each question or exercise to read its content, reference answers and available explanation.

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Cryptography questions and exercises with answers

Showing questions 31–38 of 38.

Which key does it useRead the answer and worked solution →Match the cryptographic termRead the answer and worked solution →Order signing and verifyingRead the answer and worked solution →Which security serviceRead the answer and worked solution →True or false about cryptographyRead the answer and worked solution →Complete the cryptography factsRead the answer and worked solution →Spot the false claimRead the answer and worked solution →Cryptography bingoRead the answer and worked solution →

Worked practice questions

Which key does it use

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Left
Symmetric
Items
  1. Item
    MAC on data
    Answer
    Symmetric
  2. Item
    Key wrapping
    Answer
    Symmetric
  3. Item
    One shared secret
    Answer
    Symmetric
  4. Item
    Digital signature
    Answer
    Key pair
  5. Item
    Sign with private
    Answer
    Key pair
  6. Item
    Verify with public
    Answer
    Key pair
Right
Key pair
Instructions
Swipe left for a symmetric key, right for a key pair.
_Source: NIST SP 800-175B Rev. 1, 'Guideline for Using Cryptographic Standards in the Federal Government'_

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Match the cryptographic term

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Matching pairs
  1. Left
    Plaintext
    Right
    Data that has not been encrypted
  2. Left
    Decryption
    Right
    Turning ciphertext back to plaintext
  3. Left
    Hash value
    Right
    Also called a message digest
  4. Left
    Key pair
    Right
    A public key and its private key
  5. Left
    MAC
    Right
    A keyed checksum detecting any change
  6. Left
    Mode
    Right
    Wraps a block cipher into a service
Instructions
Match each term on the left to its meaning.
_Source: NIST SP 800-175B Rev. 1, 'Guideline for Using Cryptographic Standards in the Federal Government'_

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Order signing and verifying

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Steps
  1. The signer takes the data
  2. The private key signs it
  3. The signature travels with the data
  4. The receiver takes the public key
  5. The signature is verified
Instructions
Tap the steps in the order they happen.
_Source: NIST SP 800-175B Rev. 1, 'Guideline for Using Cryptographic Standards in the Federal Government'_

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