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A blockchain application is vulnerable because it uses a weak cryptographic hash function. What is the main risk?

medium📝 Analysis Q7 of 15
Cybersecurity - Emerging Security Topics
A blockchain application is vulnerable because it uses a weak cryptographic hash function. What is the main risk?
AThe network will become centralized
BThe blockchain will run faster
CAttackers can find collisions and alter data without detection
DUsers will lose their passwords
Step-by-Step Solution
Solution:

  1. Step 1: Understand cryptographic hash function role

    Hashes uniquely represent data; strong hashes prevent collisions.

  2. Step 2: Effect of weak hash functions

    Weak hashes allow attackers to create different data with the same hash, enabling undetected tampering.

  3. Final Answer:

    Attackers can find collisions and alter data without detection -> Option C

  4. Quick Check:

    Weak hash = Collision risk [OK]
Quick Trick: Strong hashes prevent data tampering [OK]
Common Mistakes:
MISTAKES
  • Thinking weak hash improves speed
  • Confusing hashes with passwords
  • Assuming weak hash causes centralization

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