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Improved ip multimedia subsystem authentication mechanism for 3G-WLAN networks

international Journal of Security and Networks 2011年第2-3期6卷 90-100页

作者： Sharma, Madhu J. Leung, Victor C.M. Department of Electrical and Computer Engineering University of British Columbia Vancouver BC V6T 1Z4 Canada

The provision of ip multimedia subsystem (IMS) introduces important advantages for users of 3G-WLAN networks. However, a multi-pass authentication procedure needs to be performed before accessing the IMS, resulting in added overhead and possible Quality of Service (QoS) degradations. The problem is further compounded when the user moves from one Wireless Local Area Network (WLAN) domain into another, which requires the authentication procedure to be repeated. To mitigate this problem, we present a lightweight, robust, and architecture-compatible IMS authentication protocol that implements a one-pass IMS procedure by promoting efficient key re-use for a mobile user. The security of the proposed protocols is verified using the Automated Validation of Internet Security Protocols and applications (AVISPA) security analyser. We also analyse the authentication delay of our proposed scheme. Numerical results reveal a reduction in user authentication delay of more than 50% compared to the existing authentication procedure. © 2011 Inderscience Enterprises Ltd.

关键词： Next generation networks

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A Framework for the Management of Operator Policies and User Preferences for Service Compositions in the ip multimedia subsystem

A Framework for the Management of Operator Policies and User...

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IEEE Annual Computer Software and applications conference Workshops (COMPSACW)

作者： Mosiuoa Tsietsi Alfredo Terzoli George Wells Department of Computer Science Rhodes University Grahamstown South Africa

The ip multimedia subsystem (IMS) is a telecommunication middleware platform with robust service features that enables the delivery of a wide range of services to mobile network subscribers. Network operators are encouraged to develop services from service building blocks in order to avoid redundancies by re-using existing functionality. In this environment, operators must be able to control the service execution chain in order to prevent undesirable interactions from occurring between individual building blocks. It is also in their interests to provide subscribers with personalisation options so that they can modify service compositions and define their own preferences for how they would like their services to behave during live sessions. This paper describes a solution for these challenges that involves the storage of service information in an XDMS and allows operator staff and subscribers to manage this information using the XCAP protocol. The ETSI-defined XCAP application usage named simservs was chosen to demonstrate an application usage that can be used to create service compositions in XML format. A prototype is described that uses components of the open source Mobicents project to verify the suitability of the design. This work is part of a larger effort aimed at modeling interaction management in the IMS through the use of a service broker that is part of an extended IMS service layer (EISL). The service broker's functional and structural architecture have not yet been standardised.

关键词： Protocols Servers XML Subscriptions multimedia communication Telecommunication standards Law

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SAMSON strong authenticated mail service over NGN

SAMSON strong authenticated mail service over NGN

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international conference on Intelligence in Next Generation Networks (ICIN)

作者： A. Vaccani A. Delley J.-F. Wagen R. Caduff L. Knoepfli O. Koyun Fribourg University of Applied Sciences Fribourg Switzerland Ericsson AG Bern Switzerland KOBIL Systems Worms Germany

The Universal Postal Union is motivated to develop a new platform: .post, to offer digital services secured from SPAM and cybercriminal activities such as phishing and identity theft. Assuming that strong authentication, network security and QoS must be offered on the international .post platform, the use of national authentication tokens and IMS (ip multimedia subsystem) networks is proposed and discussed. A prototype architecture for the .post platform is proposed and the development of an IMS/Sip client to enable the exchange of secured and authenticated mail is described as a sample service to demonstrate the feasibility of the concept.

关键词： Authentication Portals Browsers Postal services ip networks multimedia communication

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Design and Implementation of the Mobile ipTV Service Based on the IMS Intelligent Terminal

Design and Implementation of the Mobile IPTV Service Based o...

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international conference on Internet Technology and applications (iTAP)

作者： Xin Li Jiangtao Luo Hui Li Key Laboratory on communicate networks and testing Technology Chongqing university of Posts and Telecommunications Chongqing China

This paper introduces the ip multimedia subsystem (IMS) and its terminal application. It develops a software system of the IMS intelligent terminal based on Windows Mobile. The paper also introduces the development environment and the overall structure of the IMS terminal and describes the main thread. It presents the complete process of the Internet Protocol Television (ipTV) in detail through elaborating the design of the IMS registration message and ipTV services. ipTV based on the IMS terminal can be played in the experiment network. It verifies the validity and feasibility of the system design by testing.

关键词： ipTV Servers Media Mobile communication Streaming media Protocols multimedia communication

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Design and implementation of IMS service continuity between ipTV and mobile

Design and implementation of IMS service continuity between ...

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international conference on Advanced Communication Technology (ICACT)

作者： KwangHee Choi Won Mo Kim Jong Koo Kim Kwang Sik Kim LG Uplus Research Institute of Technology Daejeon South Korea

Session Initiation Protocol (Sip) has been widely applied to multimedia telephony service in Broadband Converged Network (BCN). Sip is also adopted as the basic signalling protocol of Voip and 3GPP. ip multimedia subsystem (IMS) is a Sip based multimedia telecommunication infrastructure in 3GPP. Recently, many mobile operators have selected IMS as a core infrastructure because IMS has a flexible architecture to support converged service to support session mobility from one device to another. Nevertheless, Sip has some drawbacks such as undesirable latency during the session reestablishment procedure. In this paper, we design and implement the enhanced IMS service continuity in order to shorten the session mobility latency. To verify our work, we launched the developed system as a pilot service in our service network.

关键词： Media multimedia communication Mobile communication ipTV ip networks Servers Protocols

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A mechanism to recover voice from logged Voip sessions based on RTP

A mechanism to recover voice from logged VoIP sessions based...

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international conference on Internet multimedia Services architecture and applications, IMSAA

作者： Paromita Choudhury K. R. Prasanna Kumar G. Athithan Sukumar Nandi Center for Artificial Intelligence and Robotics Bangalore Karnataka India Department of Computer Science and Engineering Indian Institute of Technology Guwahati India

The convergence of voice and data on Internet Protocol (ip) networks has led to tremendous growth of Voice over ip (Voip). While Sip/ H.323 are dominant signaling protocols, RTP is widely used for media transfer. Certain situations may require logging of RTP sessions along with the signaling information for call and voice analysis. Recovering voice from RTP packets requires explicit handling of RTP stack and decoding. In this paper, we propose a scheme that uses softphones with appropriate codec support for voice recovery from logged RTP packets. It is done using inherent provisions of RTP, specifically SSRC-multiplexing. The scheme also suggests the possibility of an active stream injection attack in RTP based Voip.

关键词： Media Codecs Protocols ip networks Payloads Multiplexing Decoding

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Packet tagging system for enhanced traffic profiling

Packet tagging system for enhanced traffic profiling

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international conference on Internet multimedia Services architecture and applications, IMSAA

作者： André Zúquete Pedro Correia Hassan Shamalizadeh IEETA University of Aveiro Aveiro Portugal

This paper describes the design and implementation of a system for managing the tagging of traffic, in order to create detailed personal and applicational profiles. The ultimate goal of this separation is to facilitate the task of traffic auditing tools, namely in their struggle against botnets. The architecture was designed for domestic or enterprise facilities and uses the 802. IX authentication architecture as the base support infrastructure for dealing with unequivocal traffic binding to specific entities (persons or servers). Simultaneously, such binding uses virtual identities and encryption for preserving the privacy and protection of traffic originators from network eavesdroppers other than authorized traffic auditors. The traffic from each known originator is profiled with some detail, namely it includes a role tag and an application tag. Role tags are defined by originators and only partially follow a standard policy. On the contrary, application tags should follow a standard policy in order to reason about abnormal scenarios raised when correlating traffic from several instances of the same application. A first prototype was developed for Linux, using iptables and FreeRADIUS and conveying packet tagging information on a new ip option field.

关键词： ip networks Tagging Servers Authentication Linux Operating systems Libraries

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A framework for mobile healthcare applications over heterogeneous networks

A framework for mobile healthcare applications over heteroge...

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international conference on e-health Networking, applications and Services (HealthCom)

作者： Amjad Soomro Ruediger Schmitt Controls Communications and Health Informatics Philips Research North America Briarcliff Manor NY

Future healthcare applications will require operation over heterogeneous networks due to mobility of patient, caregiver and provisioning of healthcare services anytime anywhere. In contrast with applications using protocols for specific networking technologies, we propose to include a unified middleware to isolate applications from mobility management, client discovery and transport of multimedia traffic. We propose an all ip-based framework based on Sip protocol for the unified middleware. The architecture is described. We describe how handovers over heterogeneous networks could be implemented in this architecture which provide better QoS and low packet loss during transitions. A laboratory prototype to demonstrate the above concepts is presented.

关键词： Protocols Servers Medical services Mobile communication ip networks Patient monitoring Wireless LAN

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Conformance test and performance analysis for IMS session initiation

Conformance test and performance analysis for IMS session in...

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international Wireless Communications and Mobile Computing conference, IWCMC

作者： Guan-Lun Liao Tin-Yu Wu Chi-Yuan Chen Han-Chieh Chao Wei-Tsong Lee Institute of Computer Science and Information Engineering National I-Lan University Taiwan Department of Electrical Engineering Tamkang University Taiwan Department of Electrical Engineering National Dong Hwa University Taiwan

The packet-switched NGN (Next Generation Network) architecture allows users to access multimedia services via the Internet anytime and anywhere. Through the core ip multimedia subsystem (IMS), NGN can provide multimedia services, such as voice, video, data and messages over heterogeneous networks. However, for high-quality services in practical environment, the performance and QoS (Quality of Service) of NGN must be guaranteed. Thus, based on the Testing and Test Control Notation version 3 (TTCN-3) specifications, this paper develops a test system utilizing Open IMS Core for conformance test of IMS session initiation for fixed and mobile networks. We also verify the QoS and analyze the performance of SUT (System Under Test) from the experimental results.

关键词： Testing Telecommunication standards Servers Quality of service multimedia communication Next generation networking Mobile communication

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An architecture for Mobile Sensor Network Control Using IMS and Reconfigurable Hardware

An Architecture for Mobile Sensor Network Control Using IMS ...

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IEEE international Workshop on Electronic Design, Test and applications (DELTA)

作者： Raymond Peterkin Dan Ionescu Voicu Groza School of Information Technology and Engineering University of Ottawa Canada

Mobile sensors networks are used in several domains to perform various tasks related to monitoring, recording, and affecting the conditions of an environment. Interacting with mobile sensor networks deployed in public networks requires an application capable of securely exchanging data in the network, generating mobile sensor network requests and processing mobile sensor network responses. Embedded communications devices are an ideal platform through which mobile sensor network applications could be implemented due to their portability and preexisting facilities to establish network connections. The ip multimedia subsystem (IMS) is a communications framework permitting the exchange of data from communications devices across divergent networks. No research has been performed combining embedded devices and mobile sensor networks using public network facilities like IMS. This paper proposes an architecture permitting end users to perform mobile sensor network operations using IMS and embedded communications devices. The architecture is based on a reconfigurable hardware implementation of Sip to exchange data through an IMS network to query mobile sensor data, publish data to valid subscribers and control nodes. Sip is used to manage the sessions in which data are accessed by arbitrary users registered with a sensor network service.

关键词： Mobile communication Mobile computing Logic gates Robot sensing systems Servers Computer architecture multimedia communication

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