multiple keyring on logon

I get two keyring starting when turn my computer on.
i've gone to my startup applications to try and work out why.
I have the following 3 items that relate to keyring:

Certificate and key storage - GNOME keying: PKCS#11 component
Secret Storage Sevice, GNOME keyring: Secret Service
SSH Key agent, GNOME Keyring:SSH Agent

which one, or ones don't i need?
or can i just work it out through a process of elimination.
As far as i know the only password stored is for my wireless but presumably something else is starting my keyring as well.
running ubuntu 10.10

Thanks