Eccouncil 212-81 Exam - Topic 14 Question 57 Discussion

Actual exam question for Eccouncil's 212-81 exam

Question #: 57
Topic #: 14

Terrance oversees the key escrow server for his company. All employees use asymmetric cryptography to encrypt all emails. How many keys are needed for asymmetric cryptography?

Show Suggested Answer

Suggested Answer: A

https://en.wikipedia.org/wiki/Public-key_cryptography

Public-key cryptography, or asymmetric cryptography, is a cryptographic system that uses pairs of keys: public keys, which may be disseminated widely, and private keys, which are known only to the owner. The generation of such keys depends on cryptographic algorithms based on mathematical problems to produce one-way functions. Effective security only requires keeping the private key private; the public key can be openly distributed without compromising security.

In such a system, any person can encrypt a message using the receiver's public key, but that encrypted message can only be decrypted with the receiver's private key.

by Leonida at Jun 11, 2025, 11:39 AM

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Marsha

9 months ago

Yup, 2 keys for each user, that's how it works!

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Walker

9 months ago

Wait, are you sure it's just 2? Seems too simple.

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Joesph

9 months ago

I thought it might be more than that, like 4 or something.

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Blair

9 months ago

Totally agree, it's definitely 2 keys!

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Kimberlie

9 months ago

Asymmetric cryptography needs 2 keys, a public and a private one.

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Irene

10 months ago

I feel like there might be more keys involved, but I can’t recall any specific examples that suggest that.

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Alita

10 months ago

I practiced a similar question, and I believe it’s definitely two keys, but I’m worried I might be overthinking it.

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Felton

10 months ago

I’m not entirely sure, but I remember something about needing one public and one private key for each user.

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Buddy

10 months ago

I think asymmetric cryptography uses a pair of keys, so I’m leaning towards option A.

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Frederic

10 months ago

I remember learning that asymmetric cryptography uses a public key and a private key for each user, so the total number of keys needed would be 3 or more. I'll select option C.

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Wilda

11 months ago

Okay, I know asymmetric cryptography uses a public key and a private key, so that's 2 keys. But the question says "all employees" use it, so maybe there are more keys involved. I'll go with option B to be safe.

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Patti

11 months ago

Hmm, I'm a bit confused on this one. I thought asymmetric cryptography used more than 2 keys, but I can't remember the exact number. I'll have to think this through carefully.

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