Función hash
Un algoritmo que convierte datos en una huella digital única de longitud fija.
A hash function takes an input (like a word or a 1GB video) and produces a unique, fixed-length string of characters (e.g., 256 bits). It is the bedrock of data integrity. If even a single character in the input is changed, the entire hash changes completely (Avalanche Effect). This allows blockchains to verify headers and transactions in a lightweight way without checking the entire dataset every time.
🛡️ Trust Score
✅ Datos técnicos verificados
- • A hash function maps input of any size to an output of a fixed size.
- • Cryptographic hash functions are one-way (irreversible).
- • A small change in input leads to a large change in output (Avalanche Effect).
- • Determinism means the same input always produces the same hash.
- • Collision resistance means it's hard to find two different inputs with the same hash.
- • SHA-256 is the hash function used in Bitcoin's Proof of Work.
graph LR
Center["Función hash"]:::main
Pre_cryptography["cryptography"]:::pre --> Center
click Pre_cryptography "/terms/cryptography"
Pre_mathematics["mathematics"]:::pre --> Center
click Pre_mathematics "/terms/mathematics"
Rel_merkle_tree["merkle-tree"]:::related -.-> Center
click Rel_merkle_tree "/terms/merkle-tree"
Rel_digital_signature["digital-signature"]:::related -.-> Center
click Rel_digital_signature "/terms/digital-signature"
Rel_proof_of_work["proof-of-work"]:::related -.-> Center
click Rel_proof_of_work "/terms/proof-of-work"
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classDef child fill:#0f172a,stroke:#10b981,color:#94a3b8,rx:5,ry:5;
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🧒 Explícalo como si tuviera 5 años
🧼 Es como un resumen perfecto de un libro. No puedes reconstruir el libro con el resumen, pero si alguien cambia una sola palabra del libro, el resumen será totalmente distinto.
🤓 Expert Deep Dive
La resistencia a colisiones es la propiedad más difícil de cumplir. Si dos archivos diferentes generaran el mismo hash (colisión), la seguridad de la red se vería comprometida.