Q:

The last two blocks of the XTS-AES mode are

0

The last two blocks of the XTS-AES mode are


  1. padded as 10*
  2. encrypted/ decrypted using ciphertext-stealing
  3. padded as 10*1
  4. padded and then swapped after encryption/ decryption

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 (b).encrypted/ decrypted using ciphertext-stealing

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