Hash Functions and Information Security Quiz
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Questions and Answers

What is a hash function?

  • A function that converts a numerical input value into a larger numerical value
  • A function that converts a compressed input value into a numerical value
  • A function that converts a numerical input value into a compressed numerical value (correct)
  • A function that converts a fixed-length input value into a variable-length value

    • What are the direct applications of hash functions based on its cryptographic properties?

  • Password storage and integrity checks (correct)
  • Network routing and data transmission
  • Digital signatures and public key infrastructure
  • Data compression and encryption

    • What is the SHA-1 hash for the file 'ubuntu-14.04-desktop-amd64.iso'?

  • d4d44272ee5f5bf887a9c85ad09ae957bc55f89d (correct)
  • 9876543210abcdef0123456789abcdef
  • 1234567890abcdefabcdef0987654321
  • aabbccddeeff11223344556677889900

    • What are the properties required for an ideal cryptographic hash?

    <p>Pseudo-random function and fixed-length output</p> Signup and view all the answers

    What is pre-image resistance in the context of hash functions?

    <p>Given a hash, it should be hard to find a message that produces that hash</p> Signup and view all the answers

    What is the output length of a hash function?

    <p>Always of fixed length</p> Signup and view all the answers

    What is the SHA-1 hash for the file 'ubuntu-14.04-desktop-amd64.iso'?

    <p>d4d44272ee5f5bf887a9c85ad09ae957bc55f89d</p> Signup and view all the answers

    What are the two direct applications of hash functions based on its cryptographic properties?

    <p>Password Storage and Integrity checks</p> Signup and view all the answers

    What are the three important security properties required from a hash function?

    <p>Pre-image resistance, Second-preimage resistance, Collision resistance</p> Signup and view all the answers

    What is the ideal output of an ideal cryptographic hash function?

    <p>A fixed-length string from an arbitrary-length input</p> Signup and view all the answers

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