The last two blocks of the XTS-AES mode are(a) padded as 10*(b) encrypted/ decrypted using ciphertext-stealing(c) padded as 10*1(d) padded and then swapped after encryption/ decryptionThe question was asked in a job interview.Question is taken from Overview in division Cryptography Overview, TCP/IP and Communication Networks of Cryptograph & Network Security

The last two blocks of the XTS-AES mode are(a) padded as 10*(b) encryp

1.	The last two blocks of the XTS-AES mode are(a) padded as 10(b) encrypted/ decrypted using ciphertext-stealing(c) padded as 101(d) padded and then swapped after encryption/ decryptionThe question was asked in a job interview.Question is taken from Overview in division Cryptography Overview, TCP/IP and Communication Networks of Cryptograph & Network Security
Answer» The correct CHOICE is (b) encrypted/ decrypted using ciphertext-stealing Easiest explanation: The correct term used to ENCRYPT/ decrypt the last 2 blocks is ‘cipher-text stealing’ where C(m) and C(m-1) are INTERCHANGED with each other.

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