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The purpose of a ‘tweak’ in XTS-AES mode is to

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in Cryptograph & Network Security by (60.0k points)
The purpose of a ‘tweak’ in XTS-AES mode is to

(a) secure the public key

(b) provide security

(c) provide variability

(d) all of the mentioned

I had been asked this question during an online exam.

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

1 Answer

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Best answer
Correct option is (c) provide variability

The best I can explain: The purpose of the ‘tweak’ in the XTS-AES mode is to provide variability in each round.

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