[codyb]

OTP as in Open Telephony Platform?

Edit: it turns out OTP is one time password, that's neat!

I'm only familiar with that through Erlang and consider it an architectural pattern for supervision trees, would you be willing to expound a teeny bit more on what you mean?

[Boulth]

Search for TOTP or HOTP, basically one time passwords, usually shown to end users as QR codes stored in an authenticator on a mobile phone.