1. [http://library.gnome.org/devel/gnome-keyring/stable/ch01.html gnome-keyring] - password keyring 1. [http://en.wikipedia.org/wiki/Ssh-agent ssh-agent] - SSH key ring 1. [http://developer.apple.com/documentation/Security/Conceptual/keychainServConcepts/01introduction/chapter_1_section_1.html Apple Keychain]
1. To create an API by which applications acting as clients may authenticate themselves against servers without concerning themselves with the details of how the authentication is performed. 1. To centralize the storage and representation of credentials for use by clients. 1. To integrate with platform keyring services to be able to load credentials which have already been supplied by a user for general use on a system.
(incomplete, probably partially inconsistent)