Meas rDroid An Android Measurement Framework Johann Schlamp Georg - - PowerPoint PPT Presentation

The Meas rDroid Project

1 Network Architectures and Services , Georg Carle

Faculty of Informatics T echnische Universität München, Germany

Meas rDroid

An Android Measurement Framework Johann Schlamp Georg Carle

May 2, 2013

The Meas rDroid Project

2

Motivation

ASViewer, TUM-I8

The Meas rDroid Project

3

Problem Statement

 The Internet is formed by

• 45,000 ASes
• 500,000 IP prefixes

 How to unders tand the Internet topology?

• Pas s ive evaluation of BGP tables
• Active traceroute meas urements

 Different views depending on

• Your network
• Your neighbors
• Your geographic location

 Goal:

Obs erve from as much vantage points as pos s ible

The Meas rDroid Project

4

Large Scale Meas urements

 PlanetLab

• 10,000 nodes
• Meas urements : all that you want

 RIPE Atlas

• 3,000 probes
• Meas urements : ping, traceroute, DNS, SSL

 DIMES

• SETI@home approach
• 500 active agents
• Meas urements : traceroute

 Drawbacks :

• Meas urements can be bias ed
• Only few meas urement data points
• No cellular networks covered

The Meas rDroid Project

5

Example: Google

 How is Google connected to

the Internet?

• Mean AS path length: 2-3
• Mean IP path length: 12

 Is there a difference between

wired and mobile connection?

• Mean AS path length: 1-2
• Mean IP path length: 14

The Meas rDroid Project

6

Example: Google

 What about round trip times ?

The Meas rDroid Project

7

Example: Google

 Let’s have a look at DNS

• What IP addres s corres ponds to google.de?
• Ans wer: 566 IP addres s es s pread over two /16 blocks

(obs erved in 2 months of meas urement)

 Again: Is there a difference between wired and mobile

connection?

• Wired networks : 250 IP addres s es obs erved
• Mobile networks :

500 IP addres s es obs erved

 Maybe there is even a provider-s pecific difference?

• 2 network:

328 IP addres s es obs erved

• s imyo network:

323 IP addres s es obs erved

• t-mobile network:162 IP addres s es obs erved

The Meas rDroid Project

8

Res earch Goal

 Build a large s cale meas urement framework

bas ed on Android

 Bas ic concept

• Free meas urement client
• Utilization of various integrated s ens ors and

API functions

• Compile and run native C code where

neces s ary

• Give res ults back to the us er
• Focus on interdis ciplinary res earch

The Meas rDroid Project

9

Current State of Development

 Progres s s o far:

• 10 dedicated s tudents (BA/MA/HiWi)

have worked on the project

• 32,000 LOC in 35 packages
• Periodic meas urements of 335

dis tinct data points

• 10 backend s ervices up and running

 Modular des ign:

• Meas urement core API can be

readily us ed

• Additional GUIs to come s oon

The Meas rDroid Project

10

Security & Privacy

 Full encryption of meas urements

• AES 128 Bits (data)
• RSA 4096 Bits (key)
• Acces s to private RSA key only on a s erver dis connected

from the Internet

 Cryptographic s ignatures on all downloaded

configuration files

 Privacy Statement

• Full meas urement trans parency (no “hidden features ”)
• No s haring of information with third parties
• Data dis clos ure only in aggregated or anonymized form

The Meas rDroid Project

11

Next Steps

 Meas rDroid BETA tes t  Conclus ive analys is of data

• Comparis on of mobile and wired network

topology

• Anonymized vis ualization of location data
• Analys is of connected WIFI graphs (s ee

Telekom WLAN-to-go)

The Meas rDroid Project

12

Want to Contribute?

 Open s tudent pos itions

• Databas e tweaking
• GUI development
• Data analys is

 Join the BETA tes t now

• Activate “Unknown Sources ”

under Android Security Settings

• Download at

http://droid.net.in.tum.de

• Configuration Wizard auto-runs

at s tartup

• Complain to schlamp@in.tum.de

The Meas rDroid Project

13

Ques tions & Ans wers

Thanks !