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Under DES, the data encryption standard took a 64-bit block of data and subjected it to ______ levels of encryption.

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Under DES, the data encryption standard took a 64-bit block of data and subjected it to ______ levels of encryption.

(a) 64

(b) 8

(c) 16

(d) 4

This question was addressed to me by my school teacher while I was bunking the class.

The origin of the question is Cryptography in division Information Technology of Computer Fundamentals

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Right answer is (c) 16

To explain I would say: The answer is 16. It was subjected to 16 levels of encryption. DES is the data encryption standard.

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