2000-09 2020-12-02 IETF Review TSIG Algorithm names are text strings encoded using the syntax of a domain name. There is no structure required other than names for different algorithms must be unique when compared as DNS names, i.e., comparison is case insensitive. New algorithms are assigned using the IETF Review policy defined in . gss-tsig HMAC-MD5.SIG-ALG.REG.INT hmac-sha1 hmac-sha224 hmac-sha256 hmac-sha384 hmac-sha512 hmac-sha256-128 hmac-sha384-192 hmac-sha512-256