Domain Name System Security (DNSSEC) Algorithm Numbers

Created

2003-11-03

Last Updated

2026-08-10

Available Formats

XML
HTML
TXT

Registries Included Below

• DNS Security Algorithm Numbers
• DNS KEY Record Diffie-Hellman Prime Lengths
• DNS KEY Record Diffie-Hellman Well-Known Prime/Generator Pairs

DNS Security Algorithm Numbers

Registration Procedure(s)

Standards Action or Specification Required

Expert(s)

Mark Andrews, Roy Arends, Warren Kumari, Wes Hardaker

Reference

[RFC 4034][RFC 3755][RFC 6014][RFC 6944][RFC 9904]

Note

Adding a new entry to the "DNS Security Algorithm Numbers”
registry with a recommended value of "MAY" in the "Use for DNSSEC
Signing", "Use for DNSSEC Validation", "Implement for DNSSEC
Signing", or "Implement for DNSSEC Validation" columns will be
subject to the Specification Required policy as defined in 
[RFC 8126] in order to promote continued evolution of DNSSEC
algorithms and DNSSEC agility. New entries added through the
Specification Required process will have the value of "MAY” for
all columns.

Adding a new entry to, or changing an existing value in, the “DNS
Security Algorithm Numbers" registry that has any value other than
"MAY" in the "Use for DNSSEC Signing", "Use for DNSSEC
Validation", "Implement for DNSSEC Signing", or "Implement for
DNSSEC Validation" columns requires Standards Action.

If an item is not marked as "RECOMMENDED", it does not necessarily mean
that it is flawed; rather, it indicates that the item either has not been
through the IETF consensus process, has limited applicability, or is
intended only for specific use cases.
    

Note

The KEY, SIG, DNSKEY, RRSIG, DS, and CERT RRs use an 8-bit number used
to identify the security algorithm being used.

All algorithm numbers in this registry may be used in CERT RRs. Zone
signing (DNSSEC) and transaction security mechanisms (SIG(0) and TSIG)
make use of particular subsets of these algorithms. Only algorithms
usable for zone signing may appear in DNSKEY, RRSIG, and DS RRs.
Only those usable for SIG(0) and TSIG may appear in SIG and KEY RRs.

* There has been no determination of standardization of the use of this
algorithm with Transaction Security.
    

Available Formats

CSV

DNS KEY Record Diffie-Hellman Prime Lengths

Registration Procedure(s)

IETF Review

Reference

[RFC 2539]

Available Formats

CSV

DNS KEY Record Diffie-Hellman Well-Known Prime/Generator Pairs

Reference

[RFC 2539]

Available Formats

CSV