PayPal 也要提供加密貨幣服務

先是看到「PayPal to allow cryptocurrency buying, selling and shopping on its network」這篇,另外翻到了 PayPal 的新聞稿:「PayPal Launches New Service Enabling Users to Buy, Hold and Sell Cryptocurrency」。

幾個比較重要的地方是,這次會提供的是 BitcoinEthereumBitcoin Cash 以及 Litecoin 這四種:

To increase consumer understanding and adoption of cryptocurrency, the company is introducing the ability to buy, hold and sell select cryptocurrencies, initially featuring Bitcoin, Ethereum, Bitcoin Cash and Litecoin, directly within the PayPal digital wallet.

會先提供美國 PayPal 的使用者使用,然後再展到其他服務以及地區:

The service will be available to PayPal accountholders in the U.S. in the coming weeks. The company plans to expand the features to Venmo and select international markets in the first half of 2021.

另外這次的服務也不是自己跳進去搞,而是透過 Paxos Trust Company 建立起防火牆,所以當加密貨幣那邊出包的時候大概就會切割出來:

The service is enabled in the U.S. through a partnership with Paxos Trust Company, a regulated provider of cryptocurrency products and services.

比較像是個嘗試,只是這個主題很適合發新聞稿...

Stripe 也宣佈要停止支援 Bitcoin 了

Stripe 發了公告出來,要停止支援 Bitcoin:「Ending Bitcoin Support」。預定保留三個月的緩衝期,在 2018 年 4 月 23 日停掉:

Over the next three months we will work with affected Stripe users to ensure a smooth transition before we stop processing Bitcoin transactions on April 23, 2018.

跟其他單位停用的原因都差不多,愈來愈慢的交易速度與愈來愈高的手續費:

Transaction confirmation times have risen substantially; this, in turn, has led to an increase in the failure rate of transactions denominated in fiat currencies. (By the time the transaction is confirmed, fluctuations in Bitcoin price mean that it’s for the “wrong” amount.) Furthermore, fees have risen a great deal. For a regular Bitcoin transaction, a fee of tens of U.S. dollars is common, making Bitcoin transactions about as expensive as bank wires.

Steam 當時的理由很類似... (參考「Steam 停止使用 Bitcoin 購買遊戲」)

利用 pop 視窗藏起來的挖礦腳本

即使把主頁面關掉後,會因為藏起來的 popup window 而繼續挖礦:「Websites use your CPU to mine cryptocurrency even when you close your browser」,原文的 GIF 圖片就可以看出來怎麼做的了:

我是因為用了 One Window 可以避免有 pop window 產生 (都會被這個 extension 轉成 tab),另外用像是 hoshsadiq/adblock-nocoin-list 的 block ruleset 也不錯...

HTTP Archive 研究挖礦網頁的現狀

HTTP Archive 出來研究這個主題感覺就很適合:「The Performance Impact of Cryptocurrency Mining on the Web」。

不過作者是用 script name 去分析,應該還是會有一些漏網,不過可以看出一些數據了...

Cloudflare 對 Coinhive 挖礦的態度

TorrentFreak 的標題不夠精確,不過大概可以看出 Cloudflare 的想法:「Cloudflare Bans Sites For Using Cryptocurrency Miners」。

在沒有告知使用者,以及沒有提供選項關閉的情況下,Cloudflare 認定這是 Malware...