Malicious SS7 activity and why SMS should never by used for 2FA

Randy Bush randy at
Mon Apr 19 13:55:05 UTC 2021

> I'd add to that that people probably shouldn't treat phones as a
> significant increase in security, it's not really the out-of-band
> device that it used to be/was in the 1990s. Today, it basically
> equates to a second computer and the probability that the second
> computer is also compromised isn't overly unrealistic.

by the same attacker?  raises the bar a bit.  it's just a second factor,
not a guarantee.

i am a fan of the google token and don't like having to carry a
different hw token for everyone who wants to hw 2fa me.

but i think $ubject is correct.  sms 2fa is roadkill.


randy at
`gpg --locate-external-keys --auto-key-locate wkd randy at`
signatures are back, thanks to dmarc header butchery

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