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Behind the 6-digit code: Building HOTP and TOTP from scratch

(blog.dogac.dev)
248 points dogacel | 1 comments | 11 Apr 25 13:06 UTC | HN request time: 0.227s | source
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sksxihve ◴[15 Apr 25 17:52 UTC] No.43696212[source]▶
On a side note, does anyone know why banks still rely on sms 2fa codes instead of TOTP? Is there some regulatory issue that makes it more difficult?
replies(3): >>43696285 #>>43698896 #>>43699344 #
1. Rygian ◴[15 Apr 25 21:56 UTC] No.43698896[source]▶
My two banks require additional approval via push notification to the phone app. No SMS involved.

(In France.)