Multiple choice

Which of the following is the incorrect statement about Double-DES?

  1. It uses 2 DES for encryption.

  2. Decryption requires that the keys be applied in reverse order.

  3. It results in a dramatic increase in cryptographic strength for DES.

  4. It uses 2 keys for processing.

  5. It is used to provide the potential vulnerability of DES to a brute force attack.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Double-DES uses a single key that is equivalent to using 2 keys.

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