Question

9. In Electronic Codebook (ECB): a. The message is broken into independent blocks which are encrypted b. The message is broken into dependent blocks which are encrypted c. The message is broken into independent blocks which are digitally signed d. The message is broken into dependent blocks which are authenticated

Answer 1

Answer:

The correct answer is letter "A": The message is broken into independent blocks which are encrypted.

Explanation:

There are five (5) main forms of encryption: Electronic Code Book (ECB), Cipher Block Chaining (CBC), Cipher Feedback (CFB), Output Feedback (OFB), and Output Feedback (OFB). Electronic Code Book (ECB) is the simplest of all of them. Using this method to encrypt information implies dividing a message into two parts to encrypt each block independently. ECB does not hide patterns effectively because the blocks are encrypted using identical plaintexts.