Standards do, however, exist – for example, RFC 1760 (S/KEY), RFC 2289 (OTP), RFC 4226 (HOTP) and RFC 6238 (TOTP).
Тем не менее, стандарты существуют, например, RFC 1760 (S/Key), RFC 2289 (OTP), RFC 4226 (HOTP) и RFC 6238 (TOTP).