The strategic double expense of an asset, which can result in a transaction being rejected, may also be a deliberate lock that results in a waiting transaction being rejected. This can happen in the case of unexpected spending. Signing a copy transaction with the same key can cause both transactions to fail at the same time, and it can lead to the undesirable consequence that the key is reused.
Electrum and MyEtherWalle users face phishing attacks.
I have 5 plus unconfirmed deals and have been waiting for three days. This is ridiculous. And I've set a 140% dynamic transaction fee for electrum.
Electrum users are reminded of the Update Tip, which indicates that the new version of Electrum is likely to be fake, and if installed, transfer Bitcoin out in another security environment in a timely manner.
On December 27, Reddit user u/normal_rc reported that Electrum's wallet had been hacked and that nearly 250 bitcoins (243.6 BTCs, nearly $1 million) had been maliciously stolen, coinelegraph reported. Electrum then confirmed that the attack included creating a fake version of the wallet to trick users into providing password information. Electrum responded on Twitter that "this is a persistent phishing attack on Electrum users" and warned users not to download Electrum from any source other than the official website.
In this demo, Electrum developer Chris Belcher shows how to set up and use an Electrum personal server.
Users of Bitcoin wallet Electrum are currently facing phishing attacks, according to the Devi Security Lab. Hackers broadcast messages to electrum clients through a malicious server, prompting the user to update to v4.0.0, and if the user is prompted to install this backdoor-carrying client, the private key is stolen and all digital assets are stolen. As of 13:00, at least 1450 BTCs worth approximately $11.6 million had been stolen from phishing attacks that forged Electrum upgrade tips. Devi Security Labs hereby suggests that versions of Electrum below 3.3.4 are vulnerable to such phishing attacks, and users using Electrum Wallet are requested to update to the latest version of Electrum3.3.8 via the official website (electrum.org), which has not yet been officially released v4.0.0, and do not use the link in the prompt message to avoid asset losses.
According to Reddit user u/normal_rc, electrum's wallet was hacked and nearly 250 bitcoins (243.6 BTCs, nearly $1 million) were maliciously stolen, according to coinelegraph. Electrum then confirmed that the attack included creating a fake version of the wallet to trick users into providing password information. Electrum responded on Twitter that "this is a persistent phishing attack on Electrum users" and warned users not to download Electrum from any source other than the official website.
As you can see from the website monitoring, Bitcoin's electrum server currently has only 210 nodes online.
If someone's Electrum wallet is connected to one of these servers and tries to send a BTC transaction, they will see an official message telling them to update their Electrum wallet, as well as a scam URL.