Comment 6 for bug 1780365

Thank you for reporting this bug. The access via DBus when the keyring is unlocked is a well-known issue and the design of the feature as explained when reading the entirety of https://wiki.ubuntu.com/SecurityTeam/FAQ#gnome-keyring. Users who prefer to be prompted can choose to use a separate keyring than the one that is automatically unlocked upon successful login.

That said, I'm not clear if you are saying that the keyring is not locked during screensaver or logout. If either of these is the case, that sounds like a bug. Can you confirm and detail your methodology?