Types of Ciphers: Substitution and Transposition
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Questions and Answers

What is a requirement for a one-time pad encryption scheme to be considered unbreakable?

  • Making each pad with truly random values (correct)
  • Reusing the pad multiple times
  • Using a pseudorandom number generator
  • Seeding the number generator with a predictable value

    • In steganography, what is the purpose of hiding data in another media type?

  • To encrypt the data securely
  • To make the data invisible to everyone except the sender and receiver (correct)
  • To digitally watermark the media
  • To compress the data for efficient storage

    • Which method is used to embed a hidden message in steganography?

  • Most significant bit (MSB)
  • Middle bit (MB)
  • Least significant bit (LSB) (correct)
  • Random bit selection

    • What type of encryption is achieved by a one-time pad encryption scheme?

    <p>Symmetric encryption ciphers</p> Signup and view all the answers

    Why is it crucial for each pad in a one-time pad encryption scheme to be used only once?

    <p>To prevent attacks based on frequency analysis</p> Signup and view all the answers

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