Month: November 2017

你的钱包提供Segwit2x 硬分叉之后的重放攻击保护吗？如果你还不确定，请参照以下内容。 正如本周早些时候，我们在硬分叉公告中所声明的那样，BTC.com 钱包用户能够在分叉后的两条链上管理和交易比特币。我们的钱包还向所有的用户提供重放攻击保护。 遗憾的是，并不是所有的钱包都提供该功能。这篇文章的目的就是帮助钱包用户理解，如何在硬分叉之后的交易中降低损失比特币的风险。 硬分叉之后会发生什么？ 想象一下，现在已经是 Segwit2x硬分叉之后。假设，你使用的是没有内置重放攻击保护的钱包。带着分叉前的那些担心，你准备对你的比特币进行操作了。 记住，在分叉之后，你会拥有和分叉前的比特币等量的新币。为了便于区分，我们把分叉前和分叉后的币分别命名为 BT1 和 BT2。 好了，接下来，我们来看一下会有哪些可能的情况吧！ 在交易所出售比特币 在分叉之后，你决定卖掉一些比特币。假设，你选定了一家交易所，决定卖 出0.3 个BT1 。 如果你使用的钱包没有重放攻击保护功能，你就有可能会被心怀不轨的人盯上。这些“演员”可以打包数笔交易（或一笔）在另一条链上重放。这种情况下，就意味着你不仅要给交易所发送 0.3 个BT1 ，而且还要发送等量的 0.3 个BT2。这就是所谓的重放攻击。你是否觉得愤恨不已？当然会这样。这0.3个BT2本来是属于你的资产，本该完好无损地存放在你的账户里。 使用比特币付款 现在，让我们来看看如果你决定花掉一些比特币会怎么样。假设 Bob 以 0.02 个比特币的价格出售一台酷炫的自行车。自行车看起来很不错，而且你也愿意将 0.2 个BT2 发送给Bob，这样你就能拥有一辆你自己的自行车了。 当你支付 0.02 个BT2 的时候，那些心怀不轨的人可能会尝试截取你的 BT2 交易并在 BT1 链上进行重放。这种情况下，你不仅会发送 0.02 个BT2 给 Bob，还会发送出去0.02 个BT1。这可比你们商定的价格要高出很多！ 为什么会有人进行这类攻击呢？攻击者的动机并不一定是获取钱财，可能只是为了在网上引起混乱。这种想法类似于黑客通过生成病毒进行破坏。 你能做什么？ 有些人比较幸运，在上文中描述的交易类型中没有损失比特币。还有一些人，可能根本就没有注意到丢失的数额。但是你真的想要冒这个险吗？ 许多钱包仅支持在一条链上进行交易，因此这些钱包的用户需要找到另一种方法，允许他们在两条链上都能使用比特币，这一点很重要。许多钱包供应商并没有阐明他们对于重放攻击保护的立场。用户如果不确定是否能得到保护，最好能将自己的比特币转移到明确会提供重放攻击保护的钱包里。 BTC.com 钱包提供完整的重放攻击保护，并且允许用户查看余额，在分叉后的两条链上进行交易。正如八月的比特币现金硬分叉所证实的， BTC.com 在为其钱包用户提供授权方面是具有前瞻性的，并且致力于在变革时代，营造安全、顺畅的比特币体验。 下载网页版BTC.com 钱包，安装BTC.com 钱包安卓版或iOS 版，请点击：https://wallet.btc.com/ 如果你有其他问题或想给我们反馈，请发送邮件到 support@btc.com。 如何在硬分叉之后受到重放攻击时不损失比特币 was originally published in The BTC Blog on Medium, where people are continuing the conversation by highlighting and responding to this Read more …

The bitcoin cash rally is back on. At press time, the bitcoin cash-U.S. dollar (BCH/USD) exchange rate hit a four-day high of $505.90 on the day’s trading, before dipping lower to $487.47. As per CoinMarketCap, the cryptocurrency has witnessed a 9 percent gain in value over the last 24 hours. Possibly driving the rally, Bitcoin ABC – the most widely used version of the bitcoin cash software – released upgrade 0.16.0 today, with changes to come into effect via a hard fork Read more …

You’re reading Entrepreneur India, an international franchise of Entrepreneur Media. Bitcoin’s valuation is currently frothier than your morning hot cup of coffee. It ain’t like any other bubble in the past, claims the global economists. In definitive terms, in a fraction of time it obliterated even the year 2000 dot-com bubble (biggest in recent history) by spiraling more than twice its value. That’s what market pundits have been saying vociferously and freaking out over looming danger of financial doomsday. But Read more …

In the last few months, the ICO hype has led to exponential growth in the number of companies and entrepreneurs who wish to create it. Nowadays from 30-50 offerings are being announced for launch on a daily basis. And this growth is only gaining momentum. Several thousand offerings are scheduled for Spring 2018. The offerings are being conducted both by clear Blockchain-based projects with related IT projects and a traditional business industry that views tokenization not only as a new Read more …

The Wolves of Wall Street have been stirring the crypto pot again this week by downgrading ratings for chipmaker Advanced Micro Devices (AMD). Citing a faltering cryptocurrency market and a decline in demand for mining in 2018, Morgan Stanley reduced its ratings from equal-weight to underweight for the California based semiconductor giant. The results were instant, a 9% fall in AMD stock prices following the report. Graphics cards producers AMD and Nvidia have been flying high in recent months as Read more …

Things are really starting to pick up in the bitcoin price now. We saw lots of volatility overnight and a degree of short-term consolidation but the overarching trend has been to the upside. Bullish momentum dominated the Asian session and it looks as though this domination is set to continue throughout the early European session this morning. How long it will last remains to be seen but – as far as our intraday strategy goes – it’s not overly important. Read more …

Tokenbox, a comprehensive infrastructure solution designed to supply all the trading and compliance infrastructure needed to easily create new investment funds specializing in the fast-evolving cryptocurrency asset class, expects to raise the equivalent of $20 million at its Token Generation Event. The Tokenbox system was inspired by the experiences of Viktor Shpakovsky and Vladimir Smerkis, co-founders of The Token Fund which, though only six months old, is already one of the most successful collective investment vehicles in the cryptocurrency market, Read more …

It’s perhaps no surprise Jacob Eberhardt is being given the stage at ethereum’s annual developer conference. With scalability and privacy top of mind for the blockchain network, now valued in the billions, the Ph.D. researcher at the Technical University of Berlin is set to debut a new programming language at the Cancun, Mexico, event, one designed to help ethereum improve on these key weaknesses. Called ZoKrates, the goal of the project is to provide developers with a toolkit that could help them Read more …

“The chain will fork, life will go on.” Pseudonymous Bitcoin Core contributor BTCDrak views bitcoin’s upcoming Segwit2x hard fork – which has a chance of splitting bitcoin into two competing networks – with a bit of boredom. And that blase tone seems to resonate with several of bitcoin’s most active developers, even those who were vocally unhappy when the Segwit2x proposal was first unveiled in May. But just a couple weeks away from the fork itself, it appears this outrage has turned Read more …

Dan Kitwood | Getty Images A visual representation of the digital Cryptocurrency, Bitcoin on October 24, 2017 in London, England. Bitcoin surpassed $6,500 and $6,600 on Wednesday to hit a new record high after the CME announced plans to launch bitcoin futures later this year. The price of the cryptocurrency hit a high of $6,600.84 just hours after breaking through the $6,400 barrier, and minute after moving past the $6,500 mark, according to data from industry website CoinDesk. Its market Read more …

Featured CNBC’s Senior Tech Reporter Ari Levy details how the world’s most popular cryptocurrency, bitcoin, with its acceptance explosion and staggering valuations, now seems to have opened an entire new educational universe. Also read: Swiss Vocational School Lucerne University Accepts Bitcoin for Tuition Thanks to Bitcoin, Crypto Courses Aren’t Just for PhDs Professor Dan Boneh of Stanford University Computer Security Lab discussed the attraction to his cryptography course, and how it is due to “the huge valuations in these Read more …

Bitcoin prices have continued to climb today, passing $6,500 for the first time ever. The gains come soon after the number one cryptocurrency hit previous highs in recent days, passing $6,300 on Oct. 29, and then $6,400 yesterday. At press time, the price of a bitcoin is at the fresh high of $6,522, according to CoinDesk’s Bitcoin Price Index – a 1.16 percent gain for the day so far. The digital currency started the session at $6,447. According to CoinMarketCap data, bitcoin Read more …