[NRG] Notification: Alibi Routing (Qiaobin Fu) @ Tue Oct 13, 2015 11am - 12pm (NRG at BU)

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Title: Alibi Routing (Qiaobin Fu)
Abstract: There are several mechanisms by which users can gain insight into  
where their packets have gone, but no mechanisms allow users undeniable  
proof that their packets did not traverse certain parts of the world while  
on their way to or from another host. This paper introduces the problem of  
finding "proofs of avoidance": evidence that the paths taken by a packet  
and its response avoided a user-specified set of "forbidden" geographic  
regions. Proving that something did not happen is often intractable, but we  
demonstrate a low overhead proof structure built around the idea of what we  
call "alibis": relays with particular timing constraints that, when upheld,  
would make it impossible to traverse both the relay and the forbidden  
regions.

We present Alibi Routing, a peer-to-peer overlay routing system for finding  
alibis securely and efficiently. One of the primary distinguishing  
characteristics of Alibi Routing is that it does not require knowledge  
of--or modifications to--the Internet's routing hardware or policies. Rather,  
Alibi Routing is able to derive its proofs of avoidance from user-provided  
GPS coordinates and speed of light propagation delays. Using a PlanetLab  
deployment and larger-scale simulations, we evaluate Alibi Routing to  
demonstrate that many source-destination pairs can avoid countries of their  
choosing with little latency inflation. We also identify when Alibi Routing  
does not work: it has difficulty avoiding regions that users are very close  
to (or, of course, inside of).

Authors: Dave Levin, Youndo Lee, Luke Valenta, Zhihao Li, Victoria Lai,  
Cristian Lumezanu, Neil Spring, Bobby Bhattacharjee.

Paper link: http://conferences.sigcomm.org/sigcomm/2015/pdf/papers/p611.pdf
When: Tue Oct 13, 2015 11am - 12pm Eastern Time
Where: MCS 148
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Calendar: NRG at BU
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