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11th IEEE International Conference on Trust, Security and Privacy in Computing and Communications, TrustCom-2012

作者： Hofbauer, Stefan Beckers, Kristian Quirchmayr, Gerald Sorge, Christoph Network Department Danube Data Center GmbH Vienna Austria Software Engineering Paluno University of Duisburg-Essen Dusiburg Germany Multimedia Information Systems Research Group University of Vienna Vienna Austria School of Computer and Information Security University of South Australia Adelaide SA Australia Security in Networks University of Paderborn Paderborn Germany

ISBN: (纸本)9780769547459

Voice-over-IP systems are quite frequently attacked with the intent of service theft. While VoIP security has been intensively researched in the past, devised solutions often demand significant changes to the VoIP systems. In addition, several solutions propose the filtering of telephone calls, but these solutions only have a limited focus on the privacy rights of the call participants. We propose a method for analyzing communication records with the primary purpose to prevent VoIP attacks. Moreover, our approach integrates with little effort into common VoIP usage scenarios. As an example we use the prevention of toll-fraud attacks as a running example. The analysis of the communication records, however, requires investigating personal information in the communication records, e.g., call habits and phone numbers. Consequently we give an overview of major US and EU laws and regulations to elicit privacy requirements. We also demonstrate how these requirements can be implemented using Comercial-Off-The-Shelf VoIP systems. © 2012 IEEE.

关键词： Voice/data communication systems

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Ideal and non ideal condition analysis based on protection scheme in distribution fiber for immediate split ftth-pon

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Journal of Applied Sciences 2011年第6期11卷 1026-1032页

作者： Ab-Rahman, M.S. Aziz, S.A.C. Jumari, K. Computer and Network Security Research Group Department of Electrical Electronics and Systems Engineering Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia

Fiber-to-the Home (FTTH) network security has become a very essential and important topic for optical network. Fault isolation became important issues in order to provide an efficient FTTH network and simultaneously will provide continuous services to the end user without being interrupted by any failure in fiber line. In this study we discussed about the analysis for restoration scheme proposed in order to proof the system feasibility in our network survivability. Restoration scheme against the failure in distribution fiber line has been proposed. In this study, we implement a protection scheme for a novel tree-based for Intermediate Split Structure (ISS) in the drop region section. The protection mechanism will have capability to divert the signal onto protection line according to the types of failure condition and location of failures in access network. Method of analysis is discussed in two different ways, which are in ideal condition analysis and non-ideal analysis. Under ideal analysis it is involved in simulation approach according to proposed restoration scheme design. The system performance was investigated through the most common test on high-speed digital communications components and system that include the eye diagram, jitter, Q factor and bit error rate measurement. While under the non-ideal analysis it has been discussed about the power penalty analysis for optical switch cascaded in our network protection design according to the types of failure conditions. © 2011 Asian network for Scientific Information.

关键词： Failure (mechanical)

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Novel fused 1 × N polymer coupler for video surveillance applications

Novel fused 1 × N polymer coupler for video surveillance ap...

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IEEE Symposium on Business, engineering and Industrial Applications (ISBEIA)

作者： Mohd Hazwan Harun Mohammad Syuhaimi Ab-Rahman Hadi Guna Kasmiran Jumari Computer and Network Security Research Group Department of Electrical Electronic & Systems Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Bangi Selangor Malaysia

This paper demonstrate novel coupler 1 × N coupler based on polymer optical fiber (POF) was fabricated by handwork fusion method using yellow flame burner and metal tube. A new additional process - twisting-effect removal - is demonstrated to enhance fusion quality. For the purpose of performance characterization, LED fiber source with 650 wavelengths was injected into input fiber while optical power in output fibers was measured by optical power meter. The final results showed that the power-splitting performance of the coupler is satisfying since the insertion loss and excess loss is extremely low (

关键词： Optical fiber couplers Couplers Optical fiber devices Optical fiber networks Optical device fabrication

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Video signal identifier for optical line monitoring in FTTH

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Journal of Applied Sciences 2011年第12期11卷 2100-2105页

作者： Ab. Rahman, Mohd. Syuhaimi Mastang Roslan, Nadiah Jumari, Kasmiran Computer and Network Security Research Group Department of Electrical Electronics and Systems Engineering Faculty of Enginnering and Built Environment Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia

Fiber network security has become a very essential and important topic for optical network. Fault isolation became an important issue in order to provide an efficient fiber network and provide continuous services to the end user without being interrupted by any failure in fiber line. The aim of this study was to develope a video signal detector in order to determine the presence or loss of optical signal in FTTH. Phase detection method is used detect the existence of video signal. This is faster and more accurate than contrast detection. This device can accept an AC-coupled composite (CVBS), luma (Y), or any other video signal with sync and outputs a logic-level signal. The Video Signal Identifier (VSI) output is low when no sync is detected and high impedance when sync is detected. The device operates from a single +3.3V supply and is capable to detect the video signal in less than 2 sec. Hence, it offers a complete solution to detect the presence or loss of video signal with no external components in the FTTH network. © 2011 Asian network for Scientific Information.

关键词： Signal detection

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Optical moderator improves flexibility feature of fiber-to-the home network

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Journal of Applied Sciences 2011年第19期11卷 3372-3380页

作者： Ab-Rahman, Mohammad Syuhaimi Khairuddin, Aimi Amalin Aziz, Siti Asma Che Razak, Nurul Huda Abdul Jumari, Kasmiran Spectrum Technology Research Division Computer and Network Security Research Group Department of Electrical Electronic and Systems Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia

The purpose of this study was to develop a virtual lab to allow the design of new optical devices to be embedded into the network before it is sent for fabrication. A new 2×3 Optical splitter is designed and tested for the effectiveness of the lab. The device is designed using the OptiBPM software before being exported to Optical System to embed into the network. The Optical Splitter 2×3 has two different inputs and divides 50% of the input power to the first and third arm. While on the second arm, 50% of both input signals are combined. Before the design can be exported, they need to be sliced into a few parts for them to function as desired. Both of the designs will be embedded into Fiber-to-The-Home (FTTH) network test pad to be tested. Analysis of the design is done based on the performance before and after they are embedded into the network and based on the losses of output power to the input and maximum Q factor. The result shows that total insertion loss 2×3 Optical Splitter before being exported is 0.1899dB and changed to 0.3464dB after embedded into the network. The distance that the 2×3 splitter can achieve is up to 28 km at arm 1 and 3. While for arm 2, it can only achieve up to 15 km. The result obtained shows that the performance of the designs is better when embedded into the network and the virtual lab is suitable for testing new devices in the network before fabrication. © 2011 Asian network for Scientific Information.

关键词： Fiber optic networks

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The eye diagram analysis of restoration scheme in FTTH-PON

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Journal of Applied Sciences 2011年第5期11卷 840-847页

作者： Ab-Rahman, M.S. Azizan, L. Al-Hakim Aziz, S.A.C. Jumari, K. Spectrum Technology Research Division Computer and Network Security Research Group Malaysia Department of Electrical Electronic and Systems Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia

In this study, a technique for automatic restoration scheme for the ease of customers in a passive optical network is proposed. Protection switching against the failure in fiber line is carried out using our restoration scheme. The smart and intelligent system of FTTH is expected to be a key element which provides centralized monitoring, survivability and instantly maintenance of FTTH customer access network. In this study, we implement a cost effective restoration scheme for a novel tree-based for Intermediate Split Structure (ISS) in the drop region section. The protection mechanism for tree based optical switch will have capability to divert the signal onto protection line according to the types of failure condition and location of failures in access network by means of Zig Zag mechanism. This will ensure the data flow continuously due to breakdown occur in the network and instantly repair operation. We employ the dedicated and shared protection in our design. Four faulty conditions are considered in this article and OptiSystem, Inc. software is used to prove the solution feasibility. This study focused on the eye diagram parameter analysis in the FTTH-PON network during the working and failure condition. Four parameters will be concentrated which are BER, eye opening, maximum Q factor and jitter. In the case of failure condition, four restoration schemes are activated to ensure the signal flow continuously without perturbation. © 2011 Asian network for Scientific Information.

关键词： Passive optical networks

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Special issue on the best papers of the Conference on Intelligent Data Understanding (CIDU 2010)

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Statistical Analysis and Data Mining 2011年第4期4卷 355-357页

作者： Srivastava, Ashok N. Chawla, Nitesh V. Intelligent Systems Division Intelligent Data Understanding Group NASA Ames Research Center Moffett Field CA United States Department of Computer Science and Engineering Interdisciplinary Center for Network Science and Applications University of Notre Dame South Bend IN United States

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Remote host fault detecting for fiber to the home passive optical network

Remote host fault detecting for fiber to the home passive op...

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2010 International Conference on Financial Theory and engineering, ICFTE 2010

作者： Premadi, Aswir Chuan, Ng Boon Ab-Rahman, Mohammad Syuhaimi Jumari, Kasmiran Computer and Network Security Research Group Department of Electrical Electronic and Systems Engineering Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia

ISBN: (纸本)9781424477586

The remote host fault detecting for FTTH-PON using web-based is demonstrated. Our solution works on a standard local area network (LAN) using a specially designed hardware interfaced with a microcontroller integrated Ethernet. The status of optical line is automatically updated to a web server which can access by remote host via internet or LAN, with the specification available a complete system can be made with 24 man-hours. © 2010 IEEE.

关键词： Fiber to the x

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Analysis software tool for optical access network: Smart Access network - Testing, Analyzing and Database (SANTAD)

Analysis software tool for optical access network: Smart Acc...

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2010 International Conference on Financial Theory and engineering, ICFTE 2010

作者： Ng, Boonchuan Premadi, Aswir Ab-Rahman, Mohammad Syuhaimi Computer and Network Security Research Group Department of Electrical Electronics and Systems Engineering Universiti Kebangsaan Malaysia 43600 UKM Bangi Selangor Malaysia

ISBN: (纸本)9781424477586

This paper presents and experimentally demonstrates a MATLAB-based graphical user interface (GUI) namely Smart Access network - Testing, Analyzing and Database (SANTAD), which will be installed at central office (CO) for centralized monitoring the network system and troubleshooting any degradation or fault that occurs in passive optical network (PON) downwardly from CO towards customer residential locations. SANTAD is interfaced with a commercially available optical time domain reflectometer (OTDR) to accumulate every network testing result to be displayed on a single computer screen for further analyzing. The developed program will identify and present the parameters of each optical line such as the line's status, optical signal level, magnitude of decreasing, failure location, and other details as shown in the OTDR's screen. © 2010 IEEE.

关键词： MATLAB

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Physical layer monitoring in 8-branched PON-based i-FTTH

Physical layer monitoring in 8-branched PON-based i-FTTH

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2010 1st International Conference on Photonics, ICP2010

作者： Chuan, Ng Boon Premadi, Aswir Ab-Rahman, Mohammad Syuhaimi Jumari, Kasmiran Spectrum Technology Research Division Computer and Network Security Research Group Department of Electrical Electronics and Systems Engineering 43600 UKM Bangi Selangor Malaysia

ISBN: (纸本)9781424471874

This paper reports a novel physical layer monitoring technique called Centralized Failure Detection System (CFDS) based on the use of an optical time domain reflectometry (OTDR) and integrated with inexpensive additional optical devices at the middle of the network system for monitoring the fiber plant of a wide range of passive optical network (PON) based intelligent fiber-to-the-home (i-FTTH) in the background during network operation and determining the faulty branch as well as the fault parameters. Access Control System (ACS) has been developed to handle the centralized line detection for diverting the OTDR pulse signal from central office (CO) to bypass the filter and connect to each corresponding fiber link in drop section. The design and implementation of this integrated hardware/software system enable each lines' status can be observed and monitored at static point where the OTDR injecting the signal. All OTDR measurements are transmitted into remote workstation for centralized monitoring and advanced analyzing. © 2010 IEEE.

关键词： Fiber to the x

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