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A comment on Ask HN: Bank with Yubikey support?. Parent comment

Re:Ask HN: Bank with Yubikey support? by qmarchi on Wednesday April 27, 2022 @08:53PM (#31187649)
SMS is based on SS7 signaling, which is broken pretty bad: https://www.techtarget.com/whatis/definition/SS7-attack

There's also SIM-swap attacks that rely on social engineering your carrier.

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