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electrum qr code, On Tails 3.2, Electrum 3.0.1 segmentation fault opening QRcode scanner, OK on Linux Ubuntu 16.04.

Storm review: Cointelgraph Brazil reported on August 30th that users of Cielo, Brazil's largest payment processing provider, can make encrypted payments via QR codes through Cielo PoS devices. The PoS machine generates a QR code for payment, which the customer can then use to scan the QR code and make the payment. Customers also need to hold an account with Uzzo or Criptohub to complete the payment.

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Bitcoin desktop wallet client Electrum has released a 4.0 beta version, adding several important updates, including support for the Lightning network, nearly a year after the previous version of Electrum, 3.3.8 (last July). In the 4.0 beta version, Electrum mainly added features such as PSBT (partially signed Bitcoin transactions), Lightning Network, watchtowers (暸 watchtowers) and Submarineswaps (subliminal switching). (Github)

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The electrum and Electrum-LTC versions below 3.3.3 are vulnerable to phishing attacks in which a malicious server displays a message asking the user to download the fake Electrum. To prevent user exposure, versions older than 3.3 can no longer connect to public servers and must be upgraded. Do not download software updates from sources other than electrum.org and electrum-ltc.org.