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An organization wants to protect its data against future quantum attacks. Which approach best combines current cryptography with quantum resistance?

hard🚀 Application Q8 of 15
Cybersecurity - Emerging Security Topics
An organization wants to protect its data against future quantum attacks. Which approach best combines current cryptography with quantum resistance?
ASwitch entirely to symmetric encryption with 128-bit keys
BUse hybrid encryption combining classical algorithms with post-quantum algorithms
COnly use classical RSA with longer keys
DRely solely on Grover's algorithm for security
Step-by-Step Solution
Solution:

  1. Step 1: Understand hybrid encryption

    Hybrid encryption uses both classical and post-quantum algorithms to ensure security during transition.

  2. Step 2: Evaluate other options

    Longer classical keys alone are not quantum-safe; symmetric 128-bit keys are vulnerable; Grover's algorithm is an attack method, not a defense.

  3. Final Answer:

    Use hybrid encryption combining classical algorithms with post-quantum algorithms -> Option B

  4. Quick Check:

    Hybrid approach = best quantum resistance [OK]
Quick Trick: Hybrid encryption bridges classical and quantum-safe [OK]
Common Mistakes:
MISTAKES
  • Relying only on longer classical keys
  • Ignoring post-quantum algorithms
  • Misunderstanding Grover's algorithm
  • Using weak symmetric keys alone

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