What is a difference between symmetric and asymmetric encryption algorithms?

What is a difference between symmetric and asymmetric encryption algorithms?

  • Symmetric algorithms are typically hundreds to thousands of times slower than asymmetric algorithms.
  • Symmetric encryption algorithms are used to authenticate secure communications. Asymmetric encryption algorithms are used to repudiate messages.
  • Symmetric encryption algorithms are used to encrypt data. Asymmetric encryption algorithms are used to decrypt data.
  • Symmetric encryption algorithms use pre-shared keys. Asymmetric encryption algorithms use different keys to encrypt and decrypt data.
Answers Explanation & Hints:

Asymmetric algorithms can use very long key lengths in order to avoid being hacked. This results in the use of significantly increased resources and time compared to symmetric algorithms.

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