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Questions and Answers
How is the Playfair cipher different from other encryption ciphers?
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?
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?
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?
What happens to plaintext letters that fall in the same row of the matrix in the Playfair cipher?
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How are plaintext letters that fall in the same column handled in the Playfair cipher?
How are plaintext letters that fall in the same column handled in the Playfair cipher?
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Which letter in the Playfair cipher matrix counts as one letter along with 'i'?
Which letter in the Playfair cipher matrix counts as one letter along with 'i'?
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