Discuss EC-Council 212-81 Exam Topic 5 Question 73

John is trying to explain the basics of cryptography to a group of young, novice, security students. Which one of the following most accurately defines encryption?

AChanging a message using complex mathematics

BApplying keys to a message to conceal it

CComplex mathematics to conceal a message

DChanging a message so it can only be easily read by the intended recipient

Suggested Answer: D

Changing a message so it can only be easily read by the intended recipient

https://en.wikipedia.org/wiki/Encryption

Encryption is the process of encoding information. This process converts the original representation of the information, known as plaintext, into an alternative form known as ciphertext. Ideally, only authorized parties can decipher a ciphertext back to plaintext and access the original information. Encryption does not itself prevent interference but denies the intelligible content to a would-be interceptor.

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12 comments · newest first

Heike 2 months ago

A is too vague. Complex math alone doesn’t define encryption well.

Crissy 2 months ago

I lean towards B. Keys are crucial for concealing messages.

Maurine 2 months ago

I think D is the best choice. It captures the essence of encryption.

Annett 2 months ago

B is spot on! Keys are essential for encryption.

Caitlin 2 months ago

A is too vague, but C sounds pretty accurate too.

Dortha 3 months ago

Wait, can encryption really be that simple?

Tasia 3 months ago

I think D is the best answer. Makes the most sense.

Carry 3 months ago

It's all about keys and concealment!

Annita 3 months ago

I’m a bit confused; I thought encryption was more about the mathematics involved, so A or C could also be valid, right?

Apolonia 3 months ago

I practiced a question similar to this, and I think the focus is on the intended recipient being able to read it, so D sounds right to me.

Sherell 3 months ago

I'm not entirely sure, but I feel like B might be correct since it mentions applying keys, which is a big part of encryption.

Denae 4 months ago

I think I remember that encryption is about making a message unreadable without the right key, so maybe D is the best choice?

EC-Council 212-81 Exam - Topic 5 Question 73 Discussion