An administrator would like to utilize encryption that has comparable speed and strength to the
AES cipher without using AES itself. The cipher should be able to operate in the same modes as
AES and utilize the same minimum bit strength. Which of the following algorithms should the
administrator select?
A.
RC4
B.
Rijndael
C.
SHA
D.
TwoFish
E.
3DES
B. Rijndael
Among the five finalists are Rijndael and Twofish. Rjindael won and was adopted as AES while Twofish obviously did not.
Read more: Difference Between AES and Twofish | Difference Between http://www.differencebetween.net/technology/difference-between-aes-and-twofish/#ixzz4T2qkPXm4
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RC4 is definitely wrong because it is a streaming cipher. On the other hand, AES is a block cipher. The question states “The cipher should be able to operate in the same modes as AES and utilize the same minimum bit strength”.
Since the CompTIA Security+ Book did not mention Rijndael, I picked TwoFish before reading your link.
Thanks for sharing the link and the CORRECT answer.
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I think you guys have overlooked what is this link.
The answer is D.
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In cryptography, Twofish is a symmetric key block cipher with a block size of 128 bits and key sizes up to 256 bits. It was one of the five finalists of the Advanced Encryption Standard contest, but it was not selected for standardization. Twofish is related to the earlier block cipher Blowfish.
AES (acronym of Advanced Encryption Standard) is a symmetric encryption algorithm. The algorithm was developed by two Belgian cryptographer Joan Daemen and Vincent Rijmen. AES was designed to be efficient in both hardware and software, and supports a block length of 128 bits and key lengths of 128, 192, and 256 bits.
Let’s do math, od same lvl – 128bit and 128bit , 256bit and 256 bit.
Answer is Twofish.
RC4 as answer is wrong, Comptia love to take money from us.
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Rijndael is a symmetric key encryption algorithm created by Joan Daemen and Vincent Rijmen. It is a block cipher, with variable block size, variable key length & variable round number. Block length and key length can be independently specified to any multiple of 32 bits from 128 bits to 256 bits.
The Rijndael cipher as been selected as the Advanced Encryption Standard (AES).
In the Rijndael AES variant the block size is restricted to 128 bits and key length to 128, 192 or 256 bits only.
Rijndael
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From the link, AES is actually Rijndael, and the question asks “without using AES itself”, so, the answer would be TwoFish.
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