[talks] S Sevinc preFPO

Melissa M. Lawson mml at CS.Princeton.EDU
Thu Mar 1 14:36:34 EST 2012

Soner Sevinc will present his preFPO on Thursday March 8 at 9AM in Room 402. 
The members of his committee are: Larry Peterson, advisor; Jennifer Rexford 
and Andy Bavier, readers; David Walker and Michael Freedman, nonreaders. 
Everyone is invited to attend his talk. His abstract follows below. 

Discovering and authorizing resources dispersed across autonomous organizations is a 
challenge for federations as they scale. We introduce a delegation logic for federation to 
address the problem of authentication and authorization in large scale. A Federation Policy 
Language (FPL) is used to express this logic, and allows expression of custom security and 
allocation policies. One distinguishing feature of FPL is that it utilizes a DHT for storage/retrieval 
of certificates to increase fault-tolerance, efficiency and expressivity in proof constructions. 

Our contract based discovery and allocation system, CODAL, performs policy-driven peer discovery 
and collaborative resource discovery/allocation to address two problems: (1) participants in a 
federation can be unknown, and (2) their resource information and policies can be private. 

We evaluate our design in PlanetLab, emulating a realistic federation based on PlanetLab usage logs. 
Results show that our system is capable of discovering and allocating resources in a large scale federation, 
fulfilling a request from tens of organizations. We also show allocation policies are successfully 
enforced by our language,and explore run-time characteristics of the FPL proof construction process, 

and investigate certificate retrieval in terms of time and incurred system load. 

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