Eccouncil 212-81 Exam - Topic 5 Question 5 Discussion

Actual exam question for Eccouncil's 212-81 exam

Question #: 5
Topic #: 5

Ahlen is using a set of pre-calculated hashes to attempt to derive the passwords from a Windows SAM file. What is a set of pre-calculated hashes used to derive a hashed password called?

AHash matrix

BRainbow table

CPassword table

DHash table

Show Suggested Answer

Suggested Answer: B

Rainbow table

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

A rainbow table is a precomputed table for caching the output of cryptographic hash functions, usually for cracking password hashes. Tables are usually used in recovering a key derivation function (or credit card numbers, etc.) up to a certain length consisting of a limited set of characters. It is a practical example of a space--time tradeoff, using less computer processing time and more storage than a brute-force attack which calculates a hash on every attempt, but more processing time and less storage than a simple key derivation function with one entry per hash. Use of a key derivation that employs a salt makes this attack infeasible.

by Daniel at Aug 04, 2022, 01:57 AM

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Andra

4 months ago

Wait, are rainbow tables still relevant?

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Candra

4 months ago

Rainbow tables are super effective for this!

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Theron

4 months ago

Nope, it's not a password table.

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Catalina

4 months ago

I thought it was a hash table?

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Tambra

4 months ago

It's definitely a rainbow table!

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Justine

5 months ago

I recall something about pre-calculated hashes, and "Rainbow table" seems to fit, but I hope I’m not mixing it up with another term!

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Mitsue

5 months ago

I'm a bit confused; I thought "Hash table" was related to this, but now I'm leaning towards "Rainbow table" since it sounds more familiar.

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Marya

5 months ago

I remember practicing a question about password cracking methods, and "Rainbow table" definitely came up as a key concept.

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Helene

5 months ago

I think the answer might be "Rainbow table," but I'm not entirely sure if that's the exact term they used in class.

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Cyndy

5 months ago

This looks like a straightforward question about the different types of product inspections. I'll carefully read through the options and select the 3 correct answers.

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Brandon

5 months ago

I vaguely recall a question like this from our practice exams. "Service analyst" sounds familiar, but it could also be "service custodian."

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Sherita

5 months ago

Wait, I'm a bit confused. I thought smart grids had more than just three layers. I'll have to review my notes to make sure I understand the architecture properly before answering this.

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