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Commit 8f90d771 authored by mazenovi's avatar mazenovi
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enahnce bitcoin

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* gérer par une wallet * gérer par une wallet
## Bitcoin White Paper
--- * objectif: se passer d'une institution bancaire
* solution partielle: les signatures numériques
* problème à résoudre: la double dépense
* réseau P2P
* transactions horodatées chainées entre elles
* la chaîne la plus longue est la chaîne nécessitant le plus de calcul à falsifier
## Institution financière
* tiers de confiance
* fait la loi dasn les transactions
* interdit les transactions réellement irréversible
* les banques jouent le rôle de médiation
* le cout de cette médiation est répercutée sur les frais bancaires
* rend les transactions à faible montant chère
* les vendeurs cherchent à en s'assurer de "l'existence" de leurs clients
## Preuve cryptographique
* remplace le tiers de confiance.
* transactions
* directes
* irréversibles
* protège le vendeur
* un intermédiaire escrow peut protéger le vendeurs
* Une preuve calculée de l'ordonancement des blocs utilisant un serveur d'horodatage P2P
* résout le problème de la double dépenses
## Transactions
* une pièce électronique (coin)
* est une chaine de signature
![bitcoin](images/bitcoin/transactions.svg)
## Buy some ## Buy some
......
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