PayPal 旗下的 Braintree 將支援 Bitcoin 貨幣

Bitcoin 的特性使得各家金流業者被逼著要支援,不然就等著在市場上被淘汰。

Stripe 的測試「Stripe: Bitcoin」表態後,龍頭 PayPal 也出手了:「Braintree Brings One Touch Payments to the People and Will Offer Bitcoin to Developers Soon」。

目前是跟 Coinbase 合作:

In addition we announced that Braintree has partnered with Coinbase to offer a trusted and secure way for people to pay with bitcoin across their favorite apps in the coming months.

Bitcoin 有單一團體超過 50% 計算能力了...

Bitcoin 的安全性是利用「當整個社群夠大時,不會有單一團體擁有超過 50% 的計算能力」的假設上發展演算法及防護機制:(參考「Weaknesses - Bitcoin」)

An attacker that controls more than 50% of the network's computing power can, for the time that he is in control, exclude and modify the ordering of transactions. This allows him to:

  • Reverse transactions that he sends while he's in control. This has the potential to double-spend transactions that previously had already been seen in the block chain.
  • Prevent some or all transactions from gaining any confirmations
  • Prevent some or all other miners from mining any valid blocks

不過讓人噴飯的消息出來了,即使在 Bitcoin 這麼火熱的情況下,仍然有單一團體計算能力已經超過 50%:「Largest Bitcoin Mining Pool Pledges Not To Execute '51% Attack'」。

這應該是當設計時始料未及的... XD

比利時電信業者 Mobile Vikings 宣佈接受 Bitcoin 付款...

是全世界第一家電信業者接受 Bitcoin 付款:「Belgian Telecom Becomes First To Accept Bitcoin」,新聞稿在「Mobile Vikings can pay with bitcoins, a world first!」。

實際上是透過 BitPay

Mobile Vikings works with the Bitpay platform, which is like the bitcoin variant of PayPal.

仍然是很讓人振奮的事情 :p 支援 Bitcoin...

昨天 宣布支援使用 Bitcoin 購買服務。印象中這應該是第一個大型商業網站支援 Bitcoin 付款:「Pay Another Way: Bitcoin」。 是跟 BitPay 合作,實際上會依照匯率收到美金,不太需要承擔 Bitcoin 匯率不穩的問題。即使如此,這也是很大的進展... 第一步是有兌換商願意出來收 Bitcoin 付美金,以及有商業公司願意使用這些服務。