Vitalik Buterin on Warpcast

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Vitalik Buterin

Finally got back my T-mobile account (yes, it was a sim swap, meaning that someone socially-engineered T-mobile itself to take over my phone number).

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Vitalik Buterin

Main learning re twitter was: > A phone number is sufficient to password reset a Twitter account even if not used as 2FA. Can completely remove phone from Twitter. I had seen the "phone numbers are insecure, don't authenticate with them" advice before, but did not realize this

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Vitalik Buterin

I don't remember when I *added* the number; my guess is that it was required to sign up for twitter blue.

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Vitalik Buterin

Anyway, glad to be on farcaster, where my account recovery can be controlled by a good wholesome ethereum address :)

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aferg pfp

@aaronrferguson

Glad you’re back. Sorry you got sim swapped :-( Are T-Mobile going to add some extra protection to your mobile to prevent this going forward? I am anxious that mobile companies are woefully unprepared to curtail social engineering…especially if AI can simulate a speaker since many telecoms use voice for auth

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Vitalik Buterin

yeah I added all kinds of hardening to the account itself, and to various other apps

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dinislam pfp

can you describe what you asked t-mobile to do? also a t-mobile customer here, keen to harden

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VP of q/dau pfp

What kind of hardening did you add that wasn't obvious you should've added before?

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@aaronrferguson

Good! I called my telco awhile ago and the agent didn’t know about sim swapping, or if they had a policy on how to help make someone’s account less at-risk for swaps 😩

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