Hash Collisions: Why Your 'Unique' Fingerprints Aren't (And Why That's Usually OK)
The mathematical certainty of hash collisions, the near-impossibility of meaningful ones, and what it means for modern cryptography
What You'll Learn
- Why hash collisions are mathematically inevitable even with strong algorithms
- Why a possible collision is very different from a meaningful security threat
- How MD5 and SHA-1 went from trusted standards to broken algorithms
- Why modern password storage needs more than a fast hash and a salt
- When hash collisions matter for security and when they are harmless
- How crypto-agility helps systems survive when today’s algorithms eventually fail
