Which statement describes the effect of key length in deterring an attacker from hacking through an encryption key?

Last Updated: Oct 20, 2021
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Which statement describes the effect of key length in deterring an attacker from hacking through an encryption key?

  • The length of a key does not affect the degree of security.
  • The shorter the key, the harder it is to break.
  • The length of a key will not vary between encryption algorithms.
  • The longer the key, the more key possibilities exist.

Explanation: While preventing brute-force attacks and other forced decryption concerns, the longer the key length, the harder it is to break. A 64-bit key can take one year to break with a sophisticated computer, while a 128-bit key may take 1019 years to decrypt. Different encryption algorithms will provide varying key lengths for implementation.

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