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https://issues.apache.org/jira/browse/HADOOP-9392?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13659395#comment-13659395
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Kai Zheng commented on HADOOP-9392:
-----------------------------------

Larry – Thanks, when the design document updates are posted here we can 
continue to discuss this.

We do enumerate a few high level use cases and requirements targeted by 
TokenAuth in our design slides, various deployment modes and scenarios are also 
there. What are the relevant related use cases and scenarios that HSSO targets? 
Particularly the part for in-cluster deployment. We can rationalize some of 
that here now, to see what can be handled by TokenAuth and TAS. It is not 
necessary to push all discussion to the meetup at the summit, the time we will 
have there for discussion is finite anyway.

Your questions are welcome on the authorization approach. Let’s do it in 
HADOOP-9466.

Very appreciative for the bridge.
                
> Token based authentication and Single Sign On
> ---------------------------------------------
>
>                 Key: HADOOP-9392
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9392
>             Project: Hadoop Common
>          Issue Type: New Feature
>          Components: security
>            Reporter: Kai Zheng
>            Assignee: Kai Zheng
>             Fix For: 3.0.0
>
>         Attachments: token-based-authn-plus-sso.pdf
>
>
> This is an umbrella entry for one of project Rhino’s topic, for details of 
> project Rhino, please refer to 
> https://github.com/intel-hadoop/project-rhino/. The major goal for this entry 
> as described in project Rhino was 
>  
> “Core, HDFS, ZooKeeper, and HBase currently support Kerberos authentication 
> at the RPC layer, via SASL. However this does not provide valuable attributes 
> such as group membership, classification level, organizational identity, or 
> support for user defined attributes. Hadoop components must interrogate 
> external resources for discovering these attributes and at scale this is 
> problematic. There is also no consistent delegation model. HDFS has a simple 
> delegation capability, and only Oozie can take limited advantage of it. We 
> will implement a common token based authentication framework to decouple 
> internal user and service authentication from external mechanisms used to 
> support it (like Kerberos)”
>  
> We’d like to start our work from Hadoop-Common and try to provide common 
> facilities by extending existing authentication framework which support:
> 1.    Pluggable token provider interface 
> 2.    Pluggable token verification protocol and interface
> 3.    Security mechanism to distribute secrets in cluster nodes
> 4.    Delegation model of user authentication

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