Some users (like me for example) use phabricator on platforms which support newer ssh key and cipher algorithms.
Currently platforms supporting these are:
- OpenBSD - home OS of openssh development - should support nwest bells and whistles naturally
- FreeBSD - latest 10.1 relases support these keys - all my phabricator installs are on this platform
- ArchLinux - has latest openssh version in repositories
- probably several others
**ssh-ed25519** can be much smaller than others and this makes them more managable and visually recognisable.
According to talk on #phabricator@freenode, phab does some minimal checking of key type and it would be great if it supported these keys, for people who deploy it in such environment.