Internet Assigned Numbers Authority

SIG (0) Algorithm Numbers

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Available Formats



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SIG (0) Algorithm Numbers

Registration Procedure(s)
Standards Action
DNS KEY and SIG RRs [RFC2535] use an 8-bit number used to identify
the security algorithm being used listed below.
Available Formats

Number Description References Note
0 Reserved
1 RSA/MD5 [RFC2537][RFC1321] deprecated, see 5
2 Diffie-Hellman [RFC2539]
3 DSA/SHA1 [RFC2536][Federal Information Processing Standards Publication (FIPS PUB) 186, Digital Signature Standard, 18 May 1994.][Federal Information Processing Standards Publication (FIPS PUB) 180-1, Secure Hash Standard, 17 April 1995. (Supersedes FIPS PUB 180 dated 11 May 1993.)]
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