All About Lightning Electrum
The Healthy Security Lab is concerned that Nearly 250 bitcoins have been stolen in a recent hacking attack on an Electrum wallet. This attack, confirmed by Electrum, involves creating a fake version of the wallet to trick users into providing password information. Electrum responded on Twitter that "this is an ongoing phishing attack on Electrum users and advised users to download wallet apps from the official website" and that The Healthy Security Lab advised users not to install an unknown source of Electrum wallets to avoid being tricked.
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).
Lesson 1: Third-party Electrum servers can link your two transactions together. This can be avoided by running your own Electrum server, supported by your own full node.
It turns out that the FTP account password used to upload local user information, with a normal Electrum Installer file, is used once the user installs it, and sensitive information entered under Electrum is sent to a remote malicious FTP server for reception.
Electrum is a popular software wallet that works by connecting to a dedicated server. These servers receive a hash of the Bitcoin address in the wallet and reply with transaction information. Electrum Wallet is fast and has few resources, but by default, it connects to these servers and can easily monitor users. In addition to Electrum, some other software uses public Electrum servers. By 2019, it is a faster and better alternative to BIP37.
Dash releases Dash Electrum 188.8.131.52 version