
SIG (0) Algorithm Numbers

(last updated 2003-11-03)

Registries included below:
- SIG (0) Algorithm Numbers


Registry Name: SIG (0) Algorithm Numbers
Reference: [RFC3755]
Registration Procedures: IETF Standards Action

Note: 
DNS KEY and SIG RRs [RFC2535] use an 8-bit number used to identify
the security algorithm being used listed below.

Registry:
Number    Description                          References             Note
--------  -----------------------------------  ---------------------  -----------------
0         Reserved
1         RSA/MD5                              [RFC2537][RFC1321]     deprecated, see 5
2         Diffie-Hellman                       [RFC2539]  
3         DSA/SHA1                             [RFC2536][DSA][SHA-1]
4         Reserved for Elliptic Curve Crypto
5         RSA/SHA-1                            [RFC3110]  
6-251     Unassigned
252       Reserved for indirect keys           [RFC2535]
253       Private algorithms - domain name     [RFC2535]
254       Private algorithms - OID             [RFC2535]
255       Reserved


References
----------
[DSA]      Federal Information Processing Standards Publication
           (FIPS PUB) 186, Digital Signature Standard, 18 May 1994.

[RFC1321]  R. Rivest, "The MD5 Message-Digest Algorithm",
           RFC 1321, April 1992.

[RFC2535]  D. Eastlake, "Domain Name System Security Extensions",
           RFC 2535. March 1999.

[RFC2536]  D. Eastlake, "DSA KEYs and SIGs in the Domain Name
           System (DNS)", RFC 2436, March 1999.

[RFC2537]  D. Eastlake, "RSA/MD5 KEYs and SIGs in the Domain
           Name System (DNS)", RFC 2537, March 1999.

[RFC2539]  D. Eastlake, "Storage of Diffie-Hellman Keys in the
           Domain Name System (DNS)", RFC 2539, March 1999.

[RFC3110]  D. Eastlake, "RSA/SHA-1 SIGs and RSA KEYs in the 
           Domain Name System (DNS)", RFC 3110, May 2001.

[RFC3755]  S. Weiler, "Legacy Resolver Compatibility for Delegation Signer",
           RFC 3755, December 2003.

[SHA-1]    Federal Information Processing Standards Publication
           (FIPS PUB) 180-1, Secure Hash Standard, 17 April 1995.
           [Supersedes FIPS PUB 180 dated 11 May 1993.]


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