2FA, WTF?
summary
Explains why an account takeover like Matt Honan’s happens and shows three concrete 2FA methods: SMS codes (easy but interceptable), time-based one‑time passwords (HOTP/TOTP libraries, 6‑digit codes, QR code provisioning) and push approvals (phone app + webhooks). Cites Ashley Madison’s 11 million broken passwords to justify adding 2FA, walks through generating/verifying TOTP, sharing secrets via QR, and a 3‑call API option to outsource verification so systems don’t hold secrets.
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chapters (16)
- 0:00Introduction and warning
- 1:03What is 2FA?
- 2:46Matt Honen hack story
- 7:43Password security risks
- 10:56Personal hacking experience
- 13:00Adding 2FA to login flow
- 14:47SMS 2FA pros and cons
- 16:55Soft token 2FA explained
- 19:45HOTP and TOTP algorithms
- 23:58Sharing secrets via QR codes
- 26:04Soft token pros and cons
- 27:30Don't build your own 2FA
- 28:112FA as a service with Ory
- 30:38Push notification 2FA demo
- 32:48Summary and recommendations
- 35:26Q&A on privacy and data








