Currently, Ethereum networks are limited by the CPU's single-threaded performance. Early test networks enabled 25 transactions per second (under somewhat optimized conditions), which could increase to 50 or 100 tx/s. However, under the load of real-world applications, the current trading limits for Ethereum networks may be below 10 tx/s. In the past, the network has been overwhelmed, with large volumes of transactions that have been rejected, except for the most expensive deals. This is particularly evident in recent project crowdfunding, such as the Status crowdfunding, when ETH tokens suffered a massive flash crash.
Dave Wave, an analyst, posted on his Twitter account that Bitcoin may be on the verge of reaching the level of bearish resistance that has kept the market bearish since 2018.
BTCManager reported on July 27, 2018 how the SEC rejected the Winklevoss brothers' call for a Bitcoin ETF. In August 2018, the SEC also rejected three other Bitcoin ETFs.
Hoenicke also points out that there are some technical "small" problems with quarantine testimony, such as a vulnerability in Litecoin Mobile Wallet Electrum-LTC that causes users to "crash" when using older versions to send quarantine witness transactions. Hoenicke also noted that some users, after using the conversion tool, confuse addresses and send bitcoins to the isolated witness address of Litecoin.
According to Bitcoinfefees.info, the average Bitcoin transaction fee is now $2.53 per transaction, up 315 percent from the previous day
In December 2018, Slow Fog first discovered and alerted an attacker to a messaging flaw using the Electrum wallet client to force an update prompt to pop up when a user transfers money, inducing users to update and download malware to carry out a currency theft attack. Recently, slow fog technology anti-money laundering (AML) system through continuous tracking found that one of the attackers wallet address bc1qc... p2kny has stolen more than 30 BTCs for six months and has been active recently. Slow Fog alerts Electrum users to update prompts, the new version of Electrum in this update prompt is likely to be false, if installed, please promptly transfer Bitcoin out in another security environment. At the same time, slow fog called on the vast number of cryptocurrencies exchanges, wallets and other platforms of the AML wind control system black and monitor such as the above Bitcoin address. This update tip is a phishing attack by an attacker who exploits a message flaw on the Electrum client and the ElectrumX server, which requires the attacker to deploy the malicious ElectrumX server in advance, and the malicious server is localized by the user's Electrum client (because the Electrum client is a light wallet and the user needs the ElectrumX server to broadcast the transaction). At the time of the madness, malicious ElectrumX servers accounted for as many as 71% of the total, and according to incomplete statistics, hundreds of bitcoins have been stolen in this phishing attack over the past year or so. Although in early 2019 Electrum officials have said they want to adopt some security mechanisms to prevent this kind of update fishing, such as: 1. Patch Electrum client does not display rich text, does not allow arbitrary messages, only strict messages; Patch ElectrumX server implementation detects Sybil Attack (i.e. witch attacks, malicious servers that send phishing messages) and no longer broadcasts them to clients; Implement blacklisting logic to alert malicious servers outside the Electrum client view; Promote social networking sites, websites, and all forms of communication that exist with users, who should always run the latest version and always only install from official sources (electrum.org), access through security protocols (https), and verify GPG signatures in advance. However, many users of Electrum are still in the old version (less than 3.3.4), the old version is still under threat, but slow fog does not rule out that the new version will have a similar threat.
From August to September, the Bitcoin wallet Electrum was phished twice by hackers. According to statistics from various parties, the phishing attacks forged Electrum upgrade notifications have stolen at least 1,450 BTC worth $11.6 million.
So what is the IO, how do we need to understand the IO and make sure we don't fall?
USB cable and Nano S: Connect the Nano S to your computer via a USB cable.