Although we recommend that individual users set up their own Electrum server, you can also use the official Blockstream Electrum server if you prefer, and the table below contains details of the connection. The server operates on the same principle as Blockstream Explorer: no logs, no traceability, and Tor support.
The server sends a Session setup response packet to allow or (with the reason for rejection) to deny this connection.
Reddit user u/normal_rc: 'The attacker set up a lot of malicious servers. Once a user's Electrum wallet is connected to these servers, they see what appears to be an official message when sending bitcoin transactions, telling them to upgrade the Electrum wallet, which actually contains a fraudulent URL.
setup electrum server
Qtum Electrum synchronously updates electrum-related code.
Electrum Personal Servers (EPS) do not perform as well as ElectrumX or Electrs, but are easier to set up and connect to Bitcoin nodes, making them a good choice for those interested in installing private Electrum servers. Compared to fully indexed ElectrumX or Esplora instances, it is less hardware-demanding and therefore can run on normal devices.
Electrum is a well-known light wallet for Bitcoin that adds new features such as server authentication using SSL to prevent MITM attacks. So unlike other Bitcoin light wallets, Electrum cannot communicate directly with different versions of Bitcoin full nodes, and each startup connects to electrumserver to communicate, and electrum.
Enter your own Electrum server
Users of Bitcoin wallet Electrum are currently facing phishing attacks, according to Johnwick.io, a security lab. Hackers broadcast messages to the Electrum client through a malicious server, prompting the user to update to v4.0.0, and if the user follows the prompt to install this "backdoor-carrying client", the private key is stolen and all digital assets are stolen. At the time of writing, at least 1,450 BTCs worth about $11.6 million had been stolen from phishing attacks that faked Electrum upgrade tips.
You can see that the user can manually specify to connect to their own electrumserver. But most users don't understand the principle and don't build their own electrum server.
Of course, there are wallets that are not designed according to BIP rules, such as Electrum, which was the first to use mnbike patterns, and the first determinizer wallet, which was introduced in 2011, and later Trezor's introduction of the mbike rule BIP-39, which became a recognized industry standard with its widespread use. Electrum and BIP-39's mone word rules are similar, but BIP-39 uses a fixed set of 2048 thesaver, electrum uses another thesaver, but can be compatible with BIP-39's monemone thesaver, reverse is not compatible.