On scalable encryption for mobile consumer multimedia applications

Advances in wireless communication and mobile computing and networking are providing us with growing business opportunities and demands for multimedia services. Consumer networks, increasingly used for multimedia information and commercial content delivery, are destined to be heterogeneous. Meanwhile, for many multimedia services, security is an important component to restrict unauthorized multimedia content access and distribution. This suggests the need for new cryptography system implementations that can operate at different data rates, i.e., be scaled to various multimedia content, different network topology, changing bandwidth, and diverse receiver device capabilities. Content authentication is one important security tool for secure multimedia content communication. Conventional message authentication schemes do not offer suitable scalability for this new set of applications. In this paper, we study the design of scalable media data stream authentication when proxy caching is used and present a framework for multimedia authentication that supports various kinds of scalability.

Integration of mobile devices in the multimedia delivery systems provides the users (learners or business people) with access to multimedia content outside the classroom (workplace). It allows them to easily store, record and deliver multimedia content in real-time. Process of delivering multimedia content to the users requires more computational resources than mobile device can provide. In order to provide users with multimedia content that is suitable for their mobile devices and according to their needs we introduce the mobile cloud (mCloud) computing environment as paradigm that is ideal to overcome these problems. The proposed interactive mCloud system should provide high scale collaboration and interaction between the users. The system is designed for delivery of multimedia learning content to the users according to the user’s cognitive style. The content is adapted according to the context-aware network conditions. In this paper, we provide some experimental results based on experience of 90 users (students) that participated in the m-learning cooperative process. After completing the course of Database Systems, the users estimated the Quality of Experience (QoE) by using a Learning Scenario Questionnaire.

On behalf of the Technical Program Committee, we welcome all of you to the IEEE International Wireless Communications and Mobile Computing Conference (IEEE IWCMC 2011) in the beautiful campus of Bahcesehir University, Istanbul, Turkey! We are indeed delighted that this year's IEEE IWCMC accomplishes its goal under the conference theme "Making Wireless Communities," and continues its tradition of providing the premier forum for presentation of research results and experience reporting on the cutting edge research in the general areas of wireless communications and mobile computing. This year, we received more than 1000 submissions from 51 countries worldwide. Each paper received at least three peer technical reviews, comprised of 49 Symposia Chairs/Co-Chairs and a total of more than 450 TPC members from academia, government laboratories, and industries. After carefully examining all the received review reports, the IEEE IWCMC 2011 TPC finally selected about 35% high-quality papers for presentation at the conference and publication in the IEEE IWCMC 2011 proceedings. The conference program starts on Monday July 4 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> with a full day Tutorials that is free of charge to all our attendees. Then, each day starts with a keynote speaker chosen from renowned world-class leaders in the area-Dr. Rick Stevens, Dr. Mario Gerla, and Dr. Sajal Das, highlighting the latest research trends in the wireless communications, mobile computing, and networks. This year, the technical sessions reflect the continued and growing interests in a wide range of spectrum, including wireless communications and networks, cross-layer design and optimization, mobile computing, wireless sensor networks, network security, and use of wireless technologies in social emergency applications. We also added a special Workshop this year to address practical aspects of Wireless Communications and Mobile Computing, such as Multihop Wireless Network Testbeds and Experiments, Network and Communications for Advanced Society, and Federated Wireless Sensor Systems (FedSenS). There are five special sessions composed of invited papers from renowned experts from around the world. Outstanding papers will be selected for four Special Issues in well known international journals. Our objective in the future is to reduce the acceptance rate further to reach 30% and less. In addition, we would like to reduce the number of Symposia and Workshops as well to meet the conference theme.

This paper will discuss about transmission of multimedia content in limited capacity network (up to 5 Mbps), especially to study about the impact of background traffic towards multimedia content delivery quality in a limited capacity network. Observation methods proposed in the study include measurement of limited capacity network, background traffic modeling, and simulating the network to observe the impact of background traffic on multimedia content delivery Quality of Service (QoS). Constructed model of background traffic was developed based on testbed network rates of traffic measurement and were separated based on traffic types and interval of delivery. Simulation was done by using some scenarios in simulated network with different background traffic rates from the background traffic modeling. In our research, multimedia content is transmitted using H264 720p configuration. Result of simulation shows the impact of background traffic towards multimedia content delivery QoS. With the increasing rate of generated background traffic (0%, 30%, and 50%), the end-to-end delay and packet loss were also increased. On average, the QoS of multimedia content delivery were acceptable with enough quality. But when the generated background traffic was rated at 50%, the end-to-end delay of multimedia content delivery scored enough and still acceptable, while the packet loss rate of multimedia content delivery scored bad and not acceptable according to ITU-T G.114.

Multimedia content in 5G/6G networks makes safe, confidential, and efficient content delivery difficult. Intelligent systems that adapt to the ever‐changing network environment are needed to distribute multimedia content in these networks. Reinforcement learning (RL) can optimize multimedia content distribution based on network congestion, capacity, and user preferences. This study proposes RL‐based intelligent multimedia content distribution. RL algorithms learn from the network environment and generate optimum judgments incorporating several aspects of the suggested framework. The framework delivers multimedia material securely and privately with great quality. This study provides an intelligent multimedia content delivery architecture that uses RL approaches to solve 5G/6G content delivery problems. This research presents an RL system optimized with the double DQN algorithm having a reward of 51604.93 in 7000 episodes for efficient video file sharing on intracity buses. The RL agent balances network congestion and bandwidth by leveraging multiple sources such as bus and intersection caches and base stations, improving secure multimedia content delivery in 5G/6G networks and enhancing the passenger experience. The study confirms the system's effectiveness using reward and loss metrics and identifies potential future research directions. Future work could explore additional RL algorithms, scalability for larger networks, complex delivery scenarios, and integration with blockchain and edge computing for improved security and efficiency in multimedia content delivery.

The transition from delivery network and terminal oriented development of multimedia services towards multi-network and multi-terminal services is an emerging trend. This change in multimedia service development is enabled by still ongoing IP convergence of communication networks and digitalization of content. This paper presents a metadata-enabled service platform supporting development of pervasive multimedia services spanning over multiple networks and terminals, namely CAM4Home Open Platform developed in ITEA2-CAM4Home research project. The platform provides enabling services for interworking development of personalized and context aware multimedia services operating over multiple networks and multiple terminals. The platform provides a service oriented architecture and enabling services that can be used in compositions to build different types of full-featured end-to-end multimedia services. In addition, the platform introduces a novel meta-model and related metadata services enabling unified way of describing information about multimedia content, services, and user- and environment context. The platform relies on use of standardized Web Services and RDF technologies enabling operating system and network independent access to the services; thus allowing creation of pervasive and platform-independent services for any Internet connected platforms from embedded devices to mobile phones and full-featured desktop clients.Keywordsmultimediacontext-awarenessservice platformservice development

It is a great pleasure to welcome all of you to the IEEE International Wireless Communications and Mobile Computing Conference (IEEE IWCMC 2014) in the beautiful city of Nicosia, Cyprus! We are indeed delighted that this year's IEEE IWCMC accomplishes its goal under the conference theme “Connecting the World,” and continues its tradition of providing the premier forum for presentation of research results and experience reporting on the cutting edge research in the general areas of wireless communications and mobile computing. This year, we received more than 595 submissions from 35 countries. Each paper received at least three peer technical reviews, comprised of more than 500 TPC members from academia, government laboratories, and industries. After carefully examining all review reports, the IEEE IWCMC 2014 TPC finally selected about 34% high-quality papers for presentation at the conference and publication in the IEEE IWCMC 2014 proceedings. The conference program starts on Monday August 4 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> with a full day Tutorials that are free of charge to all our attendees. Then, each day starts with a keynote speaker chosen from renowned world-class leaders in the area-Dr. Mario Gerla, Dr. Fumiyuki Adachi, and Dr. Tarik Taleb, highlighting the latest research trends in the wireless communications, mobile computing, and networks. This year, the technical sessions reflect the continued and growing interests in a wide range of spectrum, including wireless communications and networks, cross-layer design and optimization, mobile computing, wireless sensor networks, network security, and use of wireless technologies in social applications. There are two special sessions composed of invited papers from renowned experts from around the world. Outstanding papers will be selected for possible Special Issues in international journals. Our objective in the future is to reduce the acceptance rate and improve the quality of presentations and discussions further.

11 - Scalable Encryption and Multi-Access Control for Multimedia

Wireless communication is one of the fastest growing industry segments today. Many types of wireless networks are now being used for applications such as personal communication, entertainment, rural and urban healthcare, smart home building, inventory control, and surveillance. This book introduces the basic concepts of wireless networks and mobile computing to give engineering students at the undergraduate/graduate level a solid background in the field. It also looks at the latest research and challenging problems in the field to serve as a reference for advanced-level researchers. Wireless Networks and Mobile Computing begins with an introduction to the different types of wireless networks, including Wi-Fi, ZigBee, cellular mobile, ad hoc, cognitive radio, wireless mesh, and wireless sensor. Subsequent chapters address more advanced topics such as: Mobility, bandwidth, and node location management issues in mobile networks Message communication techniques and protocols in ad hoc networks Recent research and future direction of wireless local area networks (WLANs) Deployment of sensor nodes in wireless sensor networks (WSNs) Energy-efficient communication in wireless networks Security aspects of wireless communication The book includes exercises at the end of every chapter to help give students a better insight into the topics presented. It includes a number of advanced-level exercises, which are research problems that may be taken up by researchers in the respective areas. This book provides a valuable reference for classroom study/teaching as well as for technology development and research in the relevant areas.

Many people now receive various multimedia services through their personal devices via a home network. The rapid growth in multimedia content and smart devices means that multimedia services can encounter many problems in home networks. High volumes of storage capacity and processing resources are required manage these large amounts of media content. In addition, users may find it difficult to receive smooth streaming services in remote places because of limited remote access functions. To address these problems, we propose a model that uses cloud computing technology to store and manage large volumes of multimedia content. The proposed model provides remote access functions for receiving multimedia services in home networks and in wireless local area networks (WLANs). The model has four components, i.e., the Assistant Gateway, cloud server, remote controller, and media device renderer. The Assistant Gateway is an important component in the proposed model. It can access a cloud server to obtain multimedia content information before sending it to users in a home network. Thus, users can receive home media streaming services via the Assistant Gateway using a media device renderer. Based on this model, we implemented each component to support streaming service for users in remote areas.

The Internet and multimedia technologies have greatly changed our lives. With the increasing popularity of multimedia entertainment applications over the Internet, innovative infrastructures and technologies are needed to efficiently distribute the surging amount of multimedia contents. Content delivery networks provide an intermediate layer of infrastructure that helps to deliver the contents from content providers to a large community of geographically distributed users. Cooperative caching and application-level multicast are two technologies that can be implemented in a multimedia content delivery network for delivering on-demand and live multimedia contents respectively. This article introduces the ideas and approaches of implementing cooperative caching and application-level multicast under a hierarchical architecture to achieve large-scale multimedia content delivery.

Multimedia content delivery is an important issue in assistive guidance systems for exhibition areas. This paper presents an automatic guidance and multimedia content presentation system utilizing location-based services and their deployment on mobile devices. A prototype installation and experimental usage in a real exhibition environment has provided promising results regarding the system's user acceptance and functionality.

To reduce the duplicated traffic and improve the performance of distributing massive volumes of multimedia contents, in-network caching has been proposed recently. However, as in-network content caching can be directly utilized to respond users’ requests, multimedia content retrieval is beyond content providers’ control and makes it hard for them to implement access control and service accounting. In this paper, we propose a Fine-grained Accountable and Space-Efficient access control scheme, called FASE, for multimedia content distribution. FASE allows content providers to be fully offline while making the best of in-network caching. In FASE, the attribute-based encryption at multimedia content provider side and access policy based authentication at the edge router side jointly ensure secure fine-grained access control. Our scheme is efficient in both space and time. By designing one time chameleon signature (OTCS), users can keep anonymous during the authentication, and their privileges can be conveniently revoked when needed. Besides, secure service accounting is implemented by letting edge routers collect service credentials generated during users’ request process. Through formal security analysis, we prove the security of our scheme. Simulation results demonstrate that our scheme is efficient with acceptable overhead.

Summary form only given, as follows. Mobile computing has emerged as an important area of computing today as we move to the next millennium. This has been made possible due to the tremendous and continued growth of wireless communications and network technology over the past decade, providing infrastructures for anytime anywhere access to distributed computing systems and information repositories. The mobility of users offers new challenges to seamless connectivity in a distributed, heterogeneous network of wireline and wireless components. Several techniques and algorithms developed by the parallel and distributed computing community can be applied to solve typical wireless networks and mobile computing: routing, scheduling, load balancing, cache coherence, information access, and QoS provisioning problems. The objective of this workshop is to bring together technologists and researchers of international reputation in the areas of Parallel and Distributed Computing and Wireless Networks and Mobile Computing in order to have a forum for discussions, exchange of ideas and presentations. It is indeed a very appropriate to have this workshop as part of the IPDPS activities. We received twenty eight papers for the workshop. Each paper was sent to three program committee members for reviewing and after the review process we selected fourteen papers for presentation at the workshop. Due to the high quality of papers received, we had to reject some good papers. We take this opportunity to thank authors of all submitted papers and the referees for their efforts in making this workshop a success. Special thanks to all the steering committee members, the general chair, the publicity chairs and the technical program committee members for their support and assistance. We look forward to having a very fruitful and enjoyable workshop.

In the recent years, there has been an increasing demand for streaming high quality multimedia content over wireless networks. Demand for triple play services (voice, video, data) by a number of simultaneously communicating users often results in lack of acceptable multimedia quality. In addition, the large transmission distance and the limited battery power of the hand-held wireless device serves as a major bottleneck over transmitting video directly from the network operator to the end-users. There has been no successful mechanism developed till date that would provide live video streaming over wireless networks. In this paper, clusterDAM – a novel cluster-based architecture is proposed for delivering adaptive multimedia content over two-hop wireless networks. An intermediate relay node serves as a proxy-client-server between the base station and the mobile users which ensures that the multimedia delivery is adapted in real-time according to the channel conditions and the quality of the multimedia content. An extensive simulation-based analysis with different kinds of network traffic and protocols indicate that the cluster-DAM architecture is significantly superior to the traditional single-hop design, not only in terms of the perceived video quality, but also in terms of the loss rate and the average bit rate.