The RFCs for HOTP[0] and TOTP[1] are very readable. I built a small cli utility to manage my TOTP logins easily using them as reference. [0] https://tools.iet

The RFCs for HOTP[0] and TOTP[1] are very readable. I built a small cli utility to manage my TOTP logins easily using them as reference. [0] https://tools.ietf.org/html/rfc4226 https://tools.ietf.org/html/rfc4226 [1] https://tools.ietf.org/html/rfc6238 https://tools.ietf.org/html/rfc6238