There is information on using (but not creating) ed25519 keys in seahorse at bug 201786 and a workaround posted at https://unix.stackexchange.com/a/189646/87770
Here is the seahorse bug: https://bugzilla.gnome.org/show_bug.cgi?id=754028 Related GNOME bugs: https://bugzilla.gnome.org/buglist.cgi?quicksearch=ed25519 ** Bug watch added: GNOME Bug Tracker #754028 https://bugzilla.gnome.org/show_bug.cgi?id=754028 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to seahorse in Ubuntu. https://bugs.launchpad.net/bugs/1420522 Title: It's not possible to create ED25519 SSH keys Status in seahorse package in Ubuntu: Confirmed Bug description: There are only options for RSA and DSA keys as you can see from the attached screenshot. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: seahorse 3.10.2-0ubuntu1 ProcVersionSignature: Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13 Uname: Linux 3.13.0-45-generic x86_64 NonfreeKernelModules: nvidia ApportVersion: 2.14.1-0ubuntu3.6 Architecture: amd64 CurrentDesktop: Unity Date: Tue Feb 10 23:16:12 2015 InstallationDate: Installed on 2014-05-16 (270 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Release amd64 (20140417) SourcePackage: seahorse UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/seahorse/+bug/1420522/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

