Internet Indirection Infrastructure (i3) Ion Stoica Daniel Adkins Shelley Zhuang Scott Shenker...

Internet Indirection Infrastructure (i3)

Ion Stoica Daniel Adkins Shelley Zhuang Scott Shenker Sonesh Surana

(Published in SIGCOMM 2002)

URL: http://i3.cs.berkeley.edu/publications/papers/i3-sigcomm.pdf

Presented By: Arati Baliga

Motivation

Internet architecture was designed for point to point communicationCommunication services like multicast, anycast , mobility faced deployment challenges.i3 provides an application level solution to this problem.Decouples act of sending from act of receiving by adding a level of indirection to this process.

i3 Overview

Packet types:<id, data><id, addr>

Communication abstractions

Stack Identifiers

An identifier stack is a list of identifiers that takes the form (id1,id2, …,idn) where idi is either an identifier or an address. Packets and triggers are

Packet P = (idstack , data)

Trigger T = (id, idstack)

Identifier stacks used in service compostion, hetrogeneous multicast and improve robustness of i3.

Service Composition

Scalable Multicast

Chord

Security

• Eavesdropping - Private triggers• Trigger Hijacking - add another level of indirection• DoS Attacks

• End-Hosts (sends a random nonce as challenge)• Trigger Loops (fair share of resources, loop

detection on trigger insert)

• Anonymity: Inherent. Eavesdropping on traffic of sender does not reveal receiver identity.

Simulations

Simulations

Performance Evaluation

Performance Evaluation

Performance Evaluation