0 
Delete DS 
DELETE 
N 
N 
[RFC4034][RFC4398][RFC8078] 
1 
RSA/MD5 (deprecated, see 5) 
RSAMD5 
N 
Y 
[RFC3110][RFC4034] 
2 
DiffieHellman 
DH 
N 
Y 
[RFC2539][proposed standard] 
3 
DSA/SHA1 
DSA 
Y 
Y 
[RFC3755][proposed standard][RFC2536][proposed standard][Federal Information Processing Standards Publication (FIPS PUB) 186,
Digital Signature Standard, 18 May 1994.][Federal Information Processing Standards Publication (FIPS PUB) 1801,
Secure Hash Standard, 17 April 1995.
(Supersedes FIPS PUB 180 dated 11 May 1993.)] 
4 
Reserved 



[RFC6725] 
5 
RSA/SHA1 
RSASHA1 
Y 
Y 
[RFC3110][RFC4034] 
6 
DSANSEC3SHA1 
DSANSEC3SHA1 
Y 
Y 
[RFC5155][proposed standard] 
7 
RSASHA1NSEC3SHA1 
RSASHA1NSEC3SHA1 
Y 
Y 
[RFC5155][proposed standard] 
8 
RSA/SHA256 
RSASHA256 
Y 
* 
[RFC5702][proposed standard] 
9 
Reserved 



[RFC6725] 
10 
RSA/SHA512 
RSASHA512 
Y 
* 
[RFC5702][proposed standard] 
11 
Reserved 



[RFC6725] 
12 
GOST R 34.102001 
ECCGOST 
Y 
* 
[RFC5933][standards track] 
13 
ECDSA Curve P256 with SHA256 
ECDSAP256SHA256 
Y 
* 
[RFC6605][standards track] 
14 
ECDSA Curve P384 with SHA384 
ECDSAP384SHA384 
Y 
* 
[RFC6605][standards track] 
15 
Ed25519 
ED25519 
Y 
* 
[RFC8080][standards track] 
16 
Ed448 
ED448 
Y 
* 
[RFC8080][standards track] 
17122 
Unassigned 




123251 
Reserved 



[RFC4034][RFC6014] 
252 
Reserved for Indirect Keys 
INDIRECT 
N 
N 
[RFC4034][proposed standard] 
253 
private algorithm 
PRIVATEDNS 
Y 
Y 
[RFC4034] 
254 
private algorithm OID 
PRIVATEOID 
Y 
Y 
[RFC4034] 
255 
Reserved 



[RFC4034][proposed standard] 