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Question 104 - 212-81 discussion

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Which of the following would be the fastest.

A.
EC
Answers
A.
EC
B.
DH
Answers
B.
DH
C.
RSA
Answers
C.
RSA
D.
AES
Answers
D.
AES
Suggested answer: D

Explanation:

AES

https://en.wikipedia.org/wiki/Symmetric-key_algorithm

AES - symmetric cipher. Symmetric keys use the same key for both encryption and decryption. Both the sender and receiver of the data must know and share the secret key. For standard encrypt/decrypt functions, symmetric algorithms generally perform much faster than their asymmetrical counterparts. This is due to the fact that asymmetric cryptography is massively inefficient. Symmetric cryptography is designed precisely for the efficient processing of large volumes of data. In other words, symmetric encryption is generally used for speed and performance, e.g. when there's a large amount of data that needs to be encrypted/protected.

Incorrect answers:

RSA - asymmetric cipher,

DH - Diffie--Hellman key exchange is a method of securely exchanging cryptographic keys over a public channel and was one of the first public-key protocols as conceived by Ralph Merkle and named after Whitfield Diffie and Martin Hellman.

EC - Elliptic-curve cryptography (ECC) is an approach to public-key cryptography based on the algebraic structure of elliptic curves over finite fields.

asked 18/09/2024
Susan Brady
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