Lesenswert, ich nutze sie überall wo ich es kann

---

Aaron Toponce : Time Based One Time Passwords - How It Works

Introduction. With all the news about Heartbleed, passwords, and two-factor authentication, I figured I would blog about exactly how two-factor authentication can work- in this case, TOTP, or Time based one time passwords. TOTP is defined in RFC 6238, and is an open standard, which means anyone ...