Multiple choice

What is the work of Output Feedback (OFB) mode?

  1. It does not produce the same ciphertext as that of plaintext.

  2. In this mode, the secret key is used to encrypt the plaintext block to form a ciphertext block.

  3. It is a block cipher implementation as a self-synchronising stream cipher.

  4. This block cipher implementation is conceptually similar to a synchronous stream cipher.

  5. Both (1) and (4)
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

These are both correct about OFB.

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