At the heart of Bitcoin’s security is a cryptographic tool called a “Hash Function” (specifically SHA-256).
Think of a Hash Function like a digital meat grinder: you feed in text of any size, and it spits out a unique 64-character hexadecimal code.
🔒 Key Properties of SHA-256:
- One-way function: Easy to compute forward, impossible to reverse.
- Deterministic: Same input always yields the exact same hash.
- Avalanche Effect: Changing even a single character in input generates a totally different output.
🧠 Today's Key Takeaway
- Hash functions act as digital fingerprints for data blocks.
- SHA-256 ensures data tamper-proofing and powers mining puzzles.
