Preuve de Travail (PoW)
Mécanisme de consensus où les mineurs valident par le calcul.
## Technical Deep Dive: The Hash Search
Miners iterate through values of a nonce to find a block hash that meets the network's difficulty target.
``python``
while hash(block_data + nonce) > target:
nonce += 1
### Key Metrics
- Target: A 256-bit number. The lower the target, the harder it is to find a valid hash.
- Hashrate: Measured in hashes per second (H/s). Currently in the Exahash (EH/s) range for Bitcoin.
- Difficulty Adjustment: A periodic recalibration of the target to ensure consistent block intervals regardless of changes in total network hashrate.
graph LR
Center["Preuve de Travail (PoW)"]:::main
Pre_consensus_mechanisms["consensus-mechanisms"]:::pre --> Center
click Pre_consensus_mechanisms "/terms/consensus-mechanisms"
Pre_hashing["hashing"]:::pre --> Center
click Pre_hashing "/terms/hashing"
Pre_cryptography["cryptography"]:::pre --> Center
click Pre_cryptography "/terms/cryptography"
Center --> Child_mining_crypto["mining-crypto"]:::child
click Child_mining_crypto "/terms/mining-crypto"
Center --> Child_asic["asic"]:::child
click Child_asic "/terms/asic"
Rel_proof_of_stake_pos["proof-of-stake-pos"]:::related -.-> Center
click Rel_proof_of_stake_pos "/terms/proof-of-stake-pos"
Rel_byzantine_fault_tolerance["byzantine-fault-tolerance"]:::related -.-> Center
click Rel_byzantine_fault_tolerance "/terms/byzantine-fault-tolerance"
Rel_proof_of_work["proof-of-work"]:::related -.-> Center
click Rel_proof_of_work "/terms/proof-of-work"
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🧒 Explique-moi comme si j'avais 5 ans
C'est comme devoir résoudre un puzzle difficile pour avoir le droit de parler. Cela empêche les tricheurs de submerger la conversation.
🤓 Expert Deep Dive
Assure l'immuabilité et la résistance à la censure via le coût énergétique (thermodynamique).