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Electrum is a world-renowned Bitcoin light wallet with a long history of multi-signature support and a very broad user base, many of which like to use Electrum as a cold wallet or multi-signature wallet for Bitcoin or even USDT (Omni). Based on this usage scenario, Electrum is used less frequently on the user's computer. The current version of Electrum is 3.3.8, and previous versions of 3.3.4 are known to have "message defects" that allow an attacker to send an "update prompt" through a malicious ElectrumX server. This "update tip" is very confusing to the user, and if you follow the prompt to download the so-called new version of Electrum, you may be tricked. According to user feedback, because of this attack, stolen bitcoins are in the four digits or more.

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It was because of this attack that Reddit took aim at mailgun, its automated mail contractor. Thousands of users have been affected, and some have reset emails via Mailgun, which could be a potentially big problem for Reddit to move on. Hackers can't access Reddit channels or users' email accounts, they said. Reddit then abandoned Mailgun as their server. Mailgun believes that "less than 1% of Mailgun customers are likely to be affected." Tippr is now available again on Reddit.

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Tor, also known as the Onion Network, is software for anonymous communication, the name derived from the original software project name "The Onion Router" acronym, the Tor network consists of more than 7,000 relay nodes, each relay node is provided free of charge by global volunteers, through layers of relay node transit, in order to hide the user's real address, avoid network monitoring and traffic analysis purposes.