CUBE

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CUBE
Secure VoIP
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Outline

• Who?
• CUBE Members
• Why?
• Motivation
• What?
• Project Description
• How?
• Design and Implementation

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Outline

• Who?
• CUBE Members
• Why?
• Motivation
• What?
• Project Description
• How?
• Design and Implementation

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CUBE
Hakan Nizamoglu
Murat Toprak
Yigitalp Ertem
Saim Güveloglu
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Outline

• Who?
• CUBE Members
• Why?
• Motivation
• What?
• Project Description
• How?
• Design and Implementation

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Costs

• Same operator fee 0.47 TL / min
• Other operators 0.64 TL / min
• Turk Telekom 0.60 TL / min
• Text message fee 0.30 TL / message

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Who is on the phone?
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Security

• Problem of both telephony and internet
  communication.
• No solution for PSTNs or GSMs
• What are the problems on internet?
• Man-in-the-middle attack
• Administrator as Big Brother

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Outline

• Who?
• CUBE Members
• Why?
• Motivation
• What?
• Project Description
• How?
• Design and Implementation

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Project Description

• Secure VoIP
• VoIP stands for Voice over Internet Protocol
• Aims low cost and secure communication
• No extra cost other than internet fee
• Data can be encrypted
• Targets from companies, military, government to
  home users

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VoIP Usage
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VoIP with external device
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Project Description

• Secure VoIP
• VoIP stands for Voice over Internet Protocol
• Aims low cost and secure communication
• No extra cost other than internet fee
• Data can be encrypted
• Targets from companies, military, government to
  home users

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Project Description

• Secure VoIP
• VoIP stands for Voice over Internet Protocol
• Aims low cost and secure communication
• No extra cost other than internet fee
• Data can be encrypted
• Targets from companies, military, government to
  home users

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Outline

• Who?
• CUBE Members
• Why?
• Motivation
• What?
• Project Description
• How?
• Design and Implementation

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FPGA Board

• Input Device Microphone
• Output Device Speaker
• Single board computer
• Encryption on board CPU
• Data Transfer over Ethernet

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Asterisk

• PBX Software
• Short for private branch exchange
• Bridge between endpoints
• Routs the data
• Open Source Telephony Project
• used by small businesses, large businesses, call
  centers, carriers and governments

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Technologies

• JAVA
• Asterisk
• Embedded Linux Kernel 2.6
• FPGA Board
• SIP / RTP / UDP Protocols

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References

• http//www.voip-info.org/wiki/view/WhatisVOIP
• http//www.economist.com/world/europe/displaystory
  .cfm?story_id14921383
• http//www.turkcell.com.tr/bireysel/tarifeler/fatu
  rali/digertarifeler/tarifesaniye
• VoIP and Skype Security, Simson L. Garfinkel
• Network Protocols Handbook, Javvin
  Technologies, INC

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• Thanks for your attention.
• You are welcome to ask questions.