Keyring

Keyring is the part of Singularity you mostly do not see. It is the secret store: the background service that keeps passwords and other secrets for the apps that need them.

What it does

Keyring runs as a daemon and provides the standard secret service on the session bus, the same interface other desktops use, so apps that know how to store a password just work. Secrets are grouped into collections, with a default one called login, and each collection is a file encrypted on disk. The encryption uses libsodium, with the key derived from your passphrase, so the contents are unreadable without it.

What you see

There is no day-to-day window. The only time Keyring shows itself is a small dialog: once to set a passphrase the first time, and after that to unlock a collection when an app asks for a secret and the keyring is locked. The rest of the time it sits quietly in the background.