Eccouncil 212-81 Exam - Topic 3 Question 74 Discussion

Actual exam question for Eccouncil's 212-81 exam

Question #: 74
Topic #: 3

[All 212-81 Questions]

A part of understanding symmetric cryptography understands the modes in which it can be used. You are

explaining those modes to a group of cryptography students. The most basic encryption mode is____________.

The message is divided into blocks, and each block is encrypted separately with no modification to the process.

ACipher block chaining (CBC)

BCipher feedback (CFB)

COutput feedback (OFB)

DElectronic codebook (ECB)

Show Suggested Answer

Suggested Answer: D

by Garry at Jun 30, 2026, 01:20 AM

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Mel

3 days ago

Really? I thought there was more to it than that!

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Sabina

8 days ago

Yup, ECB just encrypts blocks independently.

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Lemuel

13 days ago

Wait, isn't ECB considered insecure?

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Sol

18 days ago

I agree, ECB is the simplest mode.

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Keva

23 days ago

It's definitely D) Electronic codebook (ECB).

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Valene

29 days ago

I’m a bit confused about the differences between these modes, but I recall that ECB doesn't modify the process for each block, which makes it unique.

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Tommy

1 month ago

I practiced a similar question, and I think ECB was mentioned as the simplest mode, so I’m leaning towards that too.

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Kimbery

1 month ago

I'm not entirely sure, but I remember something about CBC being more secure because it uses chaining.

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Chanel

1 month ago

I think the answer might be D) Electronic codebook (ECB) since it encrypts each block independently.

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