https://www.openldap.org/lists/openldap-technical/201203/msg00105.html
Re: OpenLDAP and dynalogin (two-factor auth with HOTP)
two factor authopenldaphotp
https://www.abclinuxu.cz/poradna/linux/show/380628
mOTP vs. HOTP vs. TOTP - technicke hladisko a bezpecnost
motpvshotptotpbezpecnost
https://github.com/bhyde/cl-one-time-passwords
GitHub - bhyde/cl-one-time-passwords: One time passwords (hotp rfc4226, totp rfc6238) as used in...
One time passwords (hotp rfc4226, totp rfc6238) as used in two factor authentication systems such as Google's. - bhyde/cl-one-time-passwords
https://github.com/marcoonroad/twostep
GitHub - marcoonroad/twostep: HOTP and TOTP algorithms for 2-step verification (for OCaml)....
HOTP and TOTP algorithms for 2-step verification (for OCaml). :clock10: :closed_lock_with_key: :1234: :camel: - GitHub - marcoonroad/twostep: HOTP and TOTP...
2 step verification