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Question 120 - 212-81 discussion

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With Electronic codebook (ECB) what happens:

A.
The message is divided into blocks and each block is encrypted separately. This is the most basic mode for symmetric encryption
Answers
A.
The message is divided into blocks and each block is encrypted separately. This is the most basic mode for symmetric encryption
B.
The cipher text from the current round is XORed with the plaintext from the previous round
Answers
B.
The cipher text from the current round is XORed with the plaintext from the previous round
C.
The block cipher is turned into a stream cipher
Answers
C.
The block cipher is turned into a stream cipher
D.
The cipher text from the current round is XORed with the plaintext for the next round
Answers
D.
The cipher text from the current round is XORed with the plaintext for the next round
Suggested answer: A

Explanation:

The message is divided into blocks and each block is encrypted separately. This is the most basic mode for symmetric encryption

https://en.wikipedia.org/wiki/Block_cipher_mode_of_operation#Electronic_codebook_(ECB)

The simplest of the encryption modes is the electronic codebook (ECB) mode (named after conventional physical codebooks). The message is divided into blocks, and each block is encrypted separately.

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asked 18/09/2024
Vijayakumar Dhandapani
42 questions
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