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What is the size of the XTS-AES key?

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What is the size of the XTS-AES key?

(a) 1024 bits

(b) 64 bits

(c) 512 bits

(d) 128 bits

The question was asked in examination.

The doubt is from DES Modes of Operation topic in portion Advanced Encryption Algorithm and Block Cipher Operation of Cryptograph & Network Security

1 Answer

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Best answer
Correct answer is (c) 512 bits

Explanation: The key size can be either 256 bits or 512 bits. There are 2 keys of the same size K1 and K2.

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