Various token formats exist for enterprise SSO solutions. In order to limit the number of token formats a SSO system for Hadoop needs to process we need to define an initial out of the box format.
By transforming an incoming token into a canonical format the Hadoop authentication mechanisms need only be able to understand the SSO token formats.
This JIRA is intended to introduce one such format.
It is based on the JSON Web Token format - numerous jwt profiles are emerging in the industry - see: http://tools.ietf.org/html/draft-ietf-oauth-jwt-bearer-04 as an example.