Hackers launched a denial-of-service (DoS) attack on a well-known wallet Electrum server, according to Johnwick.io. Hackers used botnets of more than 140,000 computers to attack Electrum nodes and simultaneously deployed malicious nodes. When a user connects to these malicious nodes and sends a transaction using an older version of Electrum, the user is prompted to update the Backdoor Client. If the user installs the client as prompted, the private key is stolen and all digital assets are lost. Millions of dollars of digital currency have been stolen, according to Electrum officials. De-dimensional Security Labs recommends that users of electrum wallets be updated to the latest version of the client through the official website and never use the link in the prompt message.

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However, this upgrade is not the Ethereum 2.0 version that most of us expect, and version 2.0 will probably not be implemented until 2020.

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Blockchain Web Messaging, the veteran Bitcoin desktop wallet client Electrum released a 4.0 beta version, adding several important updates, including support for the Lightning network, nearly a year after Electrum's last release, 3.3.8 (last July). In the 4.0 beta version, Electrum primarily added features such as PSBT (partially signed Bitcoin transactions), Lightning Network, watchtowers (暸 watchtowers), and Submarine swaps (subliminal switching).

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In this demo, Electrum developer Chris Belcher shows how to set up and use electrum personal servers.

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Bit MCUs are characterized by simple architecture. In contrast, the 32-bit MCU, which handles more efficiently, is also burdened with the original crime of complex architecture. In design, there is a very important factor, that is, simplicity. The simplicity of an 8-bit MCU creates the advantage that 8-bit has an easier-to-design advantage over 32-bit in many embedded designs, and 8-bit architecture-based software and hardware is easier than 32-bit.

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You can use Security Seeds to recover your wallet on any Electrum client, even on the Electrum Wallet online web program.

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The Electrum team has also been developing other features. Electrum Wallet users can view the full release notes here.

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Here's how to dig (here's a description of the mining in Windows, Linux/Mac-like)

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$dir - "$homedir/.electrum/wallets"

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Chain News, lightweight Bitcoin Wallet Electrum announced that the next version will support Lightning network payment, implemented using Python, Electrum as a Lightning network node, wallet users do not need to run lightning network nodes to make payments, electrum lightning network nodes have been merged into the Electrum master branch.

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