ExamGecko
Search Search Login
Home Home / ECCouncil / 212-81
Question list
Search
Search
Open VPLUS File
Convert VPLUS to PDF

Related questions

Represents the total number of possible values of keys in a cryptographic algorithm or other security measure, such as a password.
If Bob is using asymmetric cryptography and wants to send a message to Alice so that only she can decrypt it, what key should he use to encrypt the message?
Message hidden in unrelated text. Sender and receiver have pre-arranged to use a pattern to remove certain letters from the message which leaves only the true message behind.
3DES can best be classified as which one of the following?
In 2007, this wireless security algorithm was rendered useless by capturing packets and discovering the passkey in a matter of seconds. This security flaw led to a network invasion of TJ Maxx and data theft through a technique known as wardriving. Which Algorithm is this referring to?
Nicholas is working at a bank in Germany. He is looking at German standards for pseudo random number generators. He wants a good PRNG for generating symmetric keys. The German Federal Office for Information Security (BSI) has established four criteria for quality of random number generators. Which ones can be used for cryptography?
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?
Which of the following is the successor of SSL?
You are studying classic ciphers. You have been examining the difference between single substitution and multi-substitution. Which one of the following is an example of a multi-alphabet cipher?
A cryptanalysis success where the attacker discovers additional plain texts (or cipher texts) not previously known.

Question 85 - 212-81 discussion

Report
Export

Which one of the following are characteristics of a hash function? (Choose two)

A.
Requires a key
Answers
A.
Requires a key
B.
One-way
Answers
B.
One-way
C.
Fixed length output
Answers
C.
Fixed length output
D.
Symmetric
Answers
D.
Symmetric
E.
Fast
Answers
E.
Fast
Suggested answer: B, C

Explanation:

Correct answers: One-way, Fixed length output

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

A cryptographic hash function is a mathematical algorithm that maps data of arbitrary size (often called the 'message') to a bit array of a fixed size (the 'hash value', 'hash', or 'message digest'). It is a one-way function, that is, a function which is practically infeasible to invert.

Incorrect answers:

Symmetric. Cryptographic algorithms can be categorized into three classes: Hash functions, Symmetric and Asymmetric algorithms. Differences: purpose and main fields of application.

Requires a key. Well, technically, this is the correct answer. But in the hash-function, ''key'' is input data.

Fast. Fast or slow is a subjective characteristic, there are many different algorithms, and here it is impossible to say this unambiguously like 'Symmetric encryption is generally faster than asymmetric encryption.'

Show Answer
asked 18/09/2024
dion alken
40 questions
PreviousPreviousNextNext
User
Your answer:
0 comments
Sorted by

Leave a comment first

ExamGecko

Copyright @2023 ExamGecko | All right reserved

Mail us: [email protected]
About us
Contact us
Twitter X
Facebook
Medium
Convert VPLUS to PDF
Open VPLUS files Easily and Quickly
Privacy Policy
Disclaimer
Terms