Playfair Cipher Algorithm
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Questions and Answers

How is the Playfair cipher different from other encryption ciphers?

  • It treats digrams in the plaintext as single units. (correct)
  • It encrypts one letter at a time.
  • It substitutes each letter with the next letter in the alphabet.
  • It uses a 5x5 matrix of numbers for encryption.

    • What does the Playfair algorithm use to construct the matrix for encryption?

  • Fibonacci sequence
  • Single letter
  • Alphabetical order
  • Keyword (correct)

    • How are repeating plaintext letters that would fall in the same pair handled in the Playfair cipher?

  • They are left unchanged.
  • They are encrypted with a different algorithm.
  • They are combined into one letter.
  • They are separated with a filler letter like 'x'. (correct)

    • What happens to plaintext letters that fall in the same row of the matrix in the Playfair cipher?

    <p>They are replaced by the letter to the right.</p> Signup and view all the answers

    How are plaintext letters that fall in the same column handled in the Playfair cipher?

    <p>They are replaced by the letter beneath.</p> Signup and view all the answers

    Which letter in the Playfair cipher matrix counts as one letter along with 'i'?

    <p>'j'</p> Signup and view all the answers

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