Hash Function definition
Définition
Cryptographic algorithm that converts input data into a fixed-size alphanumeric string
Popular hash functions like SHA-256 are one-way and collision-resistant, essential for blockchain security; even a single character change in input produces a vastly different output. Technical Specifications: SHA-256: 256-bit output, 2^256 possible hashes. Keccak-256: Used in Ethereum, different from SHA-3. Mining Target: Bitcoin adjusts every 2016 blocks. Security Properties: Avalanche effect, deterministic output, fixed length, computationally infeasible to reverse.
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