This reddit thread warns us that in case we get a call claiming to be from our bank or other organization, we should not give out any of our private info, but request that we end the call and call them back on a verified official number, even if the call we received originates from it.
The reason is that the traditional calling system is vulnerable to number spoofing, so caller ID cannot be trusted. So, this is one more thing to remember, on top of SMS being easy to intercept.
Good luck explaining thisattack & defense to elderly laymen 😨.
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