Transposition Ciphers

What are the main types of transposition ciphers?

• Playfair cipher

• Columnar transposition, rail fence transposition, double transposition, route cipher.

• Caesar cipher

• Vigenère cipher

How does the decryption process of a transposition cipher work?

• Substitute each letter in the ciphertext with a different letter.

• Reverse the ciphertext and read it backwards.

• Convert the ciphertext into binary and decode it.

• Rearrange the ciphertext into a grid and read it in the order specified by the key.

In what ways do transposition ciphers differ from substitution ciphers?

• Transposition ciphers replace characters; substitution ciphers rearrange characters.

• Transposition ciphers are faster than substitution ciphers.

• Transposition ciphers rearrange characters; substitution ciphers replace characters.

• Transposition ciphers use a key; substitution ciphers do not.

Which of the following best describes the rail fence cipher?

• A method that uses a grid to rearrange letters.

• A transposition cipher that arranges text in a zigzag pattern.

• A substitution cipher that replaces letters with symbols.

• A cipher that encrypts messages by reversing the order of letters.

What will be the encrypted text corresponding to plain text “SANFOUNDRY” using columnar transposition cipher with the keyword as “GAMES”?

• SNAUDNORFY

• ANFRSUNDOY

• SORAFUDYNN

• SNONRAFUDY