This document summarizes research on integrating encryption modules into the Sipdroid VoIP client. The research (1) developed encryption schemes using AES, DES, and RC4 and integrated them into Sipdroid, (2) created a test bed VoIP network to measure Sipdroid's performance with encryption, and (3) tested encryption's effects on quality of service metrics like packet loss, delay, and throughput. The results showed the encryption module worked well and increased delays slightly but did not significantly affect packet loss or throughput. Encrypted communications also could not be decoded when captured.

1. Performance Analysis of VoIP Client with
Integrated Encryption Module
by
Rizal "Broer", Abdi Wahab, Mudrik Alaydrus,
Muhaemin
rizalbroer@ieee.org
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2. 2

3. BackGround

Send and
receiving Email

Teleconference
& VoIP
Source: http://publikasi.kominfo.go.id (2011) 3

4. BackGround

Internet users are increasing in Indonesia
based on the results of a survey of
Communication and Information Technology
in 2011 has increased very rapidly once.

The largest percentage of 97.69% used the
Internet to send and receive email, while
the lowest is the promotion of the hotel
followed by VoIP with each percentage of
0.14% and 13.54%
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5. Research Purpose
Purpose of this research is

to integrate security features or modules or
data encryption using multiple encryption
methods such as AES, DES or RC4 on
Sipdroid VoIP client when communicate
through VoIP.

to measure the performance of the VoIP
client that has integrated security or
encryption modules.
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6. Research Question (RQ)
The formulation of problem can be determined
in this study are as follows:
• How to integrate a VoIP client running on
smarthphone or mobile-based encryption
module? (RQ1)
• How to measure the performance of mobile-
based VoIP client that has been integrated
with the encryption module? (RQ2)
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7. LITERATURE REVIEW
Penulis = Author
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8. Research Methodology
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9. The correlation between the methods,
devices, parameters and results
No Methods / devices Parameter result
Techniques
1. Making JCE Lock, Data Encryption Module
encryption scheme with AES, DES,
AES, DES, RC4 RC4.
2. Sipdroid Encryption Sipdroid integrated
Integration with Module, Source with encryption
Encryption Sipdroid features.
Module
3. Making Network Smartphone Test bed VoIP
Test Bed Android, VoIP network
Server with
Asterisk
4. Testing Sipdroid Test bed VoIP Data Testing Data
with encryption network, Android confidentiality, Security Service.
features using Smartphone, data integrity,
Security Service. Wireshark availability
5. Performance Wireshark, Test Delay, packet Performance
measurement bed VoIP network, loss, throughput, measurement data
Sipdroid with Android MOS. Sipdroid
encryption Smartphone, the
features. survey.
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10. Integrate Sipdroid with Encryption
Module
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11. Modified Sipdroid activity diagram
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12. Design of VoIP Test Bed
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13. Testing Scenario

Quality of Services ( QoS )

Packet loss

Delay

Throughput
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14. QoS Testing Result

Packet Loss
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15. QoS Testing Result

Delay
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16. QoS Testing Result

Throughput
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17. Conclusion ……..(1)
• The encryption module generated from JCE
encryption can be integrated well with
Sipdroid by encrypting the RTP payload to
be transmitted on a VoIP network.
• Measurement performance of security
service for Sipdroid integrated with
encryption module can be done well. It
indicates that the integrated encryption
module work well.
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18. Conclusion ……..(2)
• QoS result from this measurement produce
enlarged delay more than 0.01 ms for
Sipdroid integrated with encryption module,
mean while for packet loss and throughput
there are no significance changes.
• Sipdroid with encryption module can
overcome passive attack, because captured
communication data by Wireshark can not
be decoded well, this happen due to the
encryption process in data.
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19. Recommendations
• Fixing the sound quality from Sipdroid
integrated with encryption module.
• Adding a module to know encryption scheme
in the beginning of VoIP communications.
• Analyze the payload data from encrypted
RTP.
• Simulate an attack on Sipdroid integrated
with encryption module.
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20. Thank You
Rizalbroer@ieee.org
www.rizalbroer.info
www.facebook.com/rizal.broer
https://twitter.com/rizalbroer
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