Les bitcoins

Thèmes abordés

Bitcoin, monnaie numérique, porte monnaie électronique, minage, Satoshi Nakamoto

Résumé du document

Les bitcoins sont une monnaie numérique qui se stockent dans un porte monnaie électronique.

Qu‘est ce que les bitcoins?
- nouvelle devise monétaire électronique
- créée en 2009 par Satoshi Nakamoto
- jetons électroniques que nous échangeons sur le web
- impossible à falsifier
- générés et gérés par des algorithmes associés à un réseau.
- comparés à de l'argent liquide virtuel
- 2 abrévations: BTC et XBC

Extraits

[...] Ce mécanisme est sécurisé par un procédé cryptographique qui s'appelle « la preuve de calcul » ( proof of work ) Les avantages de « miner »: - le minage permet de gagner de l'argent - sans effort, l'ordinateur (carte graphique + circuits spécialisés) travaille tout seul Les inconvénients de « miner »: - il faut des appareils très puissants - appareils inutilisables pendant qu'ils « minent » - coût d'investissement de départ élevé - il faut avoir un logiciel de « minage » http://www.pc-boost.com/news/upload/27_July_2013/bitcoin2_grande.JPGhttp://samoht.fr/wp-content/uploads/2013/12/Rig-le-mining-de-Bitcoins.png La création Les transactions et les frais Mt. Gox. = Mt. Gox est une plateforme d'échange de bitcoins (Tokyo). Elle a été la plus importante plateforme d'échange de Bitcoins. Son effondrement en 2014 serait dû à un piratage informatique. Les pirates auraient en effet réussi à détourner bitcoins ( euros). Le bitcoin s'échange contre des euros sur une dizaine de plate-formes. [...]

[...] Les bars et les restaurants Services web Informatique Santé Artisanat Juridique Screenshot Aux USA ou en GB; il y a déjà des distributeurs de billets à partir de comptes bitcoins. 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http://www.bitcoin.fr/public/divers/Robocoin_distributeurs_de_bitcoins.jpg Qu‘est ce qu‘on peut acheter avec les bitcoins? http://siliconangle.com/files/2014/01/Bitcoin-Accepted-Here-Waves-Coffeehouse-Vancouver-by-Marc-van-der-Chijs.jpg Acheter: des produits alimentaires un hébergement du matériel électronique des médicaments des cadeaux des livres de la drogue des services non-légaux . Payer: un restaurant un avocat un billet de train . Conclusion: Beaucoup d'avantage, peut d'inconvénient pour le consommateur / le client. Mais des limites pour l'Etat qui n'a pas de contrôle. [...]

[...] I tout savoir sur le bitcoin Qu‘est ce que les bitcoins? nouvelle devise monétaire électronique créée en 2009 par Satoshi Nakamoto jetons électroniques que nous échangeons sur le web impossible à falsifier générés et gérés par des algorithmes associés à un réseau. comparés à de l'argent liquide virtuel 2 abrévations: BTC et XBC http://www.bitcoin.fr/public/pages/.qualites-bitcoin_s.jpg Liberté de paiement et simplicité Utilisation dans tous les pays (≠Chine) Aucun ou peu de frais de transaction/traitement Moins de risques pour les commerçants Transparence et neutralité Le compte ne peux pas être bloqué Protège l'inflation AVANTAGES: http://www.bitcoin.fr/public/pages/.defauts-bitcoin_s.jpg Une grande ignorance de cette monnaie virtuelle Volatilisé Développement en cours Problème de disque dur DESAVANTAGES, RISQUES: Le minage = le minage est le nom donné au mécanisme de création monétaire des bitcoins. [...]