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How many 3DES blocks are present in the ANSI X9.17 PRNG?

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How many 3DES blocks are present in the ANSI X9.17 PRNG?

(a) 2

(b) 3

(c) 4

(d) 5

I have been asked this question in semester exam.

This intriguing question comes from Pseudorandom Number Generators and Stream Ciphers topic in division Pseudorandom Number Generation and Stream Ciphers and More Block Ciphers of Cryptograph & Network Security

1 Answer

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Best answer
Correct option is (b) 3

Easy explanation: There are 3 3DES blocks in the ANSI X9.17 PRNG.

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