Identities have a life in the sense that they are created, registered, used and deregistered. Identity management is about supporting efficient recognition and authentication of people, entities and organizations in computer network environments. It is often forgotten that identity registration is just as important as identity authentication for the overall authentications assurance. Various jurisdictions and organizations have defined authentication frameworks that specify policies for the life cycle of identities and their use in authentication. This talk will present the general components that authentication framework should contain, and go through a set of prominent authentication frameworks from around the world, including from the US, UK and Australia.