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检索条件"任意字段=Conference on Multimedia Content Access - Algorithms and Systems"

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A New Security Architecture for BitTorrent

A New Security Architecture for BitTorrent

引用

Int Joint conference of 10th IEEE Int Conf on Trust, Security and Privacy in Computing and Communications (TrustCom) / 8th IEEE Int Conf on Embedded Software and systems (ICESS) / 6th Int Conf on Frontier of Computer Science and Technology (FCST)

作者： Bader, Firas Radoveneanu, Andra Ragab-Hassen, Hani Univ Kent Sch Comp Canterbury Kent England

ISBN: (纸本)9780769546001

With the proliferation of the use of Internet for distributing multimedia and software content, there is an increasing need for efficient and secure data distribution mechanisms that can scale to large numbers of users. The peer-to-peer protocol BitTorrent is scalable and is widely used to share unprotected files. The lack of security in BitTorrent obstructs its deployment for business applications. P2P systems have developed up to a point where their use in a business context is hampered by the lack of security. We propose to add the missing security services, widening the range of use of P2P systems. In this paper we propose a new and scalable security architecture for BitTorrent that provides reliable mechanisms for authentication, authorization, and confidentiality. The security architecture we propose for BitTorrent could be used in both personal and business contexts, and its comparison to existing architectures shows its efficiency.

关键词： Peer-to-peer BitTorrent access control X.509 XACML

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Modern B-tree techniques

Modern B-tree techniques

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IEEE 27th International conference on Data Engineering (ICDE 2011)

作者： Graefe, Goetz Kuno, Harumi Hewlett Packard Labs Palo Alto CA 94304 USA

ISBN: (纸本)9781424489589

In summary, the core design of B-trees has remained unchanged in 40 years: balanced trees, pages or other units of I/O as nodes, efficient root-to-leaf search, splitting and merging nodes, etc. On the other hand, an enormous amount of research and development has improved every aspect of B-trees including data contents such as multi-dimensional data, access algorithms such as multi-dimensional queries, data organization within each node such as compression and cache optimization, concurrency control such as separation of latching and locking, recovery such as multi-level recovery, etc. Gray and Reuter believed in 1993 that âB-trees are by far the most important access path structure in database and file systems.â?It seems that this statement remains true today. B-tree indexes are likely to gain new importance in relational databases due to the advent of flash storage. Fast access latencies permit many more random I/O operations than traditional disk storage, thus shifting the break-even point between a full-bandwidth scan and a B-tree index search, even if the scan has the benefit of columnar database storage. We hope that this tutorial of B-tree techniques will stimulate research and development of modern B-tree indexing techniques for future data management systems.

关键词： B-tree index search Bandwidth Data structures Encoding Indexes Maintenance engineering Tutorials cache optimization concurrency control concurrency control data content data organization file system flash storage relational databases relational databases tree data structures

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IP storage and stored content management using SIP presence server with XML database

IP storage and stored content management using SIP presence ...

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2011 Australasian Telecommunication Networks And Applications conference, ATNAC 2011

作者： Nomoto, Yoshihiro Kuzukawa, Tomonori Ishibashi, Yutaka NTT Service Integration Laboratories NTT Corporation 9-11 Midori-Cho 3-Chome Musashino-Shi Tokyo 180-8585 Japan Graduate School of Engineering Nagoya Institute of Technology Gokiso-Cho Showa-Ku Nagoya 466-8555 Japan

ISBN: (纸本)9781457717109

There are few studies of content delivery systems specializing in consumer generated video (CGV) exchange, and as for the real exchange technique, exchange through the file server in a network has become mainstream. A solution using P2P has been also proposed, but a structure for safe content exchange guaranteed by the service provider is necessary for the further spread of a service. Therefore, we propose a distributed storage video on demand system (DSVS) for delivering CGV content stored in a user IP storage. It is important to know how the server in a network manages stored CGV(s), including the storage. A standard system for managing the storage and also the stored files does not exist. Thus, we propose a storage management system, a part of our DSVS, that uses a session initiation protocol presence function and an XML database management system. These are additional functions of the IP multimedia subsystem, which is a core system of the next generation network (NGN). In Japan, access services for the IPv6 Internet and an NGN with one IPv6 address began in 2011. Therefore, the number of potential NGN users will increase with the spread of the IPv6 Internet access service. We show that our system can become the foundation of various content delivery services due to the versatility of the storage management capability of our DSVS. © 2011 IEEE.

关键词： Technology transfer

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Proceedings - 7th International conference on Signal Image Technology and Internet-Based systems, SITIS 2011

Proceedings - 7th International Conference on Signal Image T...

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7th International conference on Signal Image Technology and Internet-Based systems, SITIS 2011

ISBN: (纸本)9780769546353

The proceedings contain 68 papers. The topics discussed include: QoS routing for heterogeneous mobile ad hoc networks based on multiple exponents in the definition of the weighted connectivity index;a secure autonomous document architecture for enterprise digital right management;evolving e-learning ontologies for personal and cloud learning environments;efficient and rich context representation for web applications;a mashup personalization service based on semantic web rules and linked data;handling semantic conflicts in DaaS composition: a service mediation approach;enhancing recommender systems with access to electronic health records and groups of interest in social networks;adapting indexation to the content, context and queries characteristics in distributed multimedia systems;dynamic classifier aggregation using fuzzy t-conorm integral;and evaluating the impact of the development of innovative products: a multi-agent systems based methodology.

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Recommendation in the end-to-end encrypted domain 11

Recommendation in the end-to-end encrypted domain

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20th ACM conference on Information and Knowledge Management, CIKM'11

作者： Shieh, Jyh-Ren Lin, Ching-Yung Wu, Ja-Ling Graduate Institute of Networking and Multimedia National Taiwan University Taipei 10617 Taiwan IBM T. J. Waston Research Center New York NY 10532 United States Graduate Institute of Networking and Multimedia Department of CS National Taiwan University Taipei 10617 Taiwan

ISBN: (纸本)9781450307178

In recommendation systems, a central host typically requires access to user profiles in order to generate useful recommendations. This access, however, undermines user privacy;the more information is revealed to the host, the more the user's privacy is compromised. In this paper, we propose a novel end-to-end encrypted recommendation mechanism which encrypts sensitive private data at the user end, without ever exposing plaintext private data to the host server. Unlike previously proposed privacy-preserving recommendation mechanisms, the data in this proposed system are lossless - a pivotal feature to many applications, e.g., in health informatics, business analytics, cyber security, etc. We achieve this goal by developing encrypted-domain polynomial ring homomorphism cryptographic algorithms to compute similarity of encrypted scores on the server, so that collaborative recommendations can be computed in the encryption domain and only an authorized person can decrypt the exact results. We also propose a novel key management system to make sure private information retrieval and recommendation computations can be executed in the encrypted domain in practice. Our experiments show that the proposed scheme offers robust security and lossless accurate recommendation, as well as high efficiency. Our preliminary results show the recommendation accuracy is 21% better than the existing statistical lossy privacy-preserving mechanisms based on random perturbation and user profile distribution. This new approach can potentially be applied to various data mining and cloud computing environments and significantly alleviates the privacy concerns of users. © 2011 ACM.

关键词： Recommender systems

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Securing IP-multimedia Subsystem (IMS) against anomalous message exploits by using machine learning algorithms

Securing IP-Multimedia Subsystem (IMS) against anomalous mes...

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作者： Rafique, M. Zubair Khan, Zeeshan Shafi Khan, Muhammad Khurram Alghatbar, Khaled King Saud University Riyadh Saudi Arabia

ISBN: (纸本)9780769543673

Modern communication infrastructure (IP multimedia Subsystem (IMS) and Voice over IP (VoIP)) are vulnerable to zero day attacks and unknown threats. Anomalous SIP requests can be used to remotely launch malicious activity. Furthermore, anomalous messages are capable of crashing - sometimes with one message only - servers and end points. Recently, it is shown that a malicious SIP message "INVITE of Death" crash a server or gain unfettered access to it. In contrast, little research is done to protect IMS against such anomalous messages. In this paper, we propose an anomalous message detection framework that extracts novel syntactical features from SIP messages at the P-CSCF of an IMS. Our framework operates in four steps: (1) analyzes the byte-level distribution of SIP message, (2) extracts spatial features from IMS messages in form of byte transition probabilities, (3) uses well-known feature selection scheme to remove redundancy in the features set, and (4) uses standard machine learning algorithms to raise the final alarm. The benefit of our framework is that it is lightweight requiring less processing and memory resources and provides high detection accuracy. We have evaluated our system on a real-world IMS dataset consisting of more than 10, 000 benign and malicious SIP messages. The results of our experiments demonstrate that using machine learning algorithms, our framework achieves detection accuracy of more than 99%. Last but not least, its testing time is 152μ seconds per packet, as a result, it can be easily deployed on IMS core. © 2011 IEEE.

关键词： Learning systems

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A Concept for Monitoring Self-transforming Code Using Memory Page access Control Management

A Concept for Monitoring Self-transforming Code Using Memory...

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IEEE International Carnahan conference on Security Technology (ICCST)

作者： Maaser, Christian Baier, Harald Ctr Adv Secur Res Darmstadt CASED D-64293 Darmstadt Germany

ISBN: (纸本)9781457709029

Current antivirus software still focuses on using signature based algorithms on file content level to detect malware. Unfortunately, there is a simple way to circumvent this detection method: The malware author applies a code transformation algorithm (e.g. a packing or encryption scheme) to his malware plaintext and saves the reverse transformation algorithm along with the unsuspicious looking block of transformed malware. Malware, which is obfuscated in that way, is called polymorphic malware. We call the transformation of the plaintext to the transformed malware as encoding and the reverse operation as decoding. Although current malware detection systems adopted and implemented several techniques to counter this, these methods are mostly either unreliable or suffer heavy performance drawbacks. We present a non-intrusive and lightweight method to monitor any executable code in real-time, which allows efficient detection of polymorphic malware.

关键词： Malware detection polymorphic code obfuscation memory manager NX bit

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Proceedings - 2011 4th IEEE International conference on Utility and Cloud Computing, UCC 2011

Proceedings - 2011 4th IEEE International Conference on Util...

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4th IEEE/ACM International conference on Cloud and Utility Computing, UCC 2011

ISBN: (纸本)9780769545929

The proceedings contain 62 papers. The topics discussed include: information dispersion over redundant arrays of optimal cloud storage for desktop users;placement matters: replica placement in peer-assisted storage clouds;high-speed storage nodes for the cloud;on the performance of distributed clustering algorithms in file and streaming processing systems;defeating network jitter for virtual machines;utilizing memory content similarity for improving the performance of replicated virtual machines;energy-efficient virtual machine provision algorithms for cloud systems;efficiency assessment of parallel workloads on virtualized resources;coasters: uniform resource provisioning and access for clouds and grids;impact of cloud computing virtualization strategies on workloads' performance;towards profitable virtual machine placement in the data center;and using lightweight virtual machines to run high performance computing applications: the case of the weather research and forecasting model.

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Adapting Indexation to the content, Context and Queries Characteristics in Distributed multimedia systems

Adapting Indexation to the Content, Context and Queries Char...

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International IEEE conference on Signal-Image Technologies and Internet-Based System

作者： Mihaela Brut Dana Codreanu Ana-Maria Manzat Florence Sedes Institut de Recherche en Informatique de Toulouse Université Paul Sabatier Toulouse France

Due to the dramatically increasing amount of multimedia contents in several application domains, effective and flexible solutions for distributed data indexation are essential. In the management of these multimedia contents, the indexing process is the most important resource consumer, in terms of data transfer over the network and CPU consumption. As result of our research, we located two points for reducing resource consumption: the limitation of multimedia content transfer over the network for indexing, as well as the reduction of multimedia indexing amount by employing only the most appropriate algorithms for performing indexation, only over the relevant contents. We present in this paper the solution developed in the context of the LINDO project for indexing multimedia content into a distributed system that originally address these two points by reducing as much as possible the resource consumption through (1) a distributed indexing technique that avoids multimedia transfer, (2) a flexible mechanism for selecting the indexing algorithms to be employed on each remote server, according to the multimedia content characteristics, its acquisition context and user queries history.

关键词： Servers Indexing multimedia communication Context Streaming media Feature extraction

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Australasian Telecommunication Networks and Applications conference, ATNAC 2011

Australasian Telecommunication Networks and Applications Con...

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2011 Australasian Telecommunication Networks And Applications conference, ATNAC 2011

ISBN: (纸本)9781457717109

The proceedings contain 47 papers. The topics discussed include: a green and secure authentication for the 4th generation mobile network;DES-Chan: a framework for distributed channel assignment in wireless sensor networks;a novel distributed content replication and placement scheme for wireless mesh networks;MAR: message-aware routing for opportunistic wireless ad hoc networks;vertical handoff decision and network merit for integrated wireless and mobile networks;hierarchical DWT based optimal diversity power allocation for video transmission in MIMO wireless systems with quantized feedback;optimal subcarrier allocation for H.264 based scalable video transmission in 4G OFDMA systems;a packet scheduling scheme for 4G wireless access systems aiming to maximize revenue for the telecom carriers;impact of MAC parameters on the performance of IEEE 802.15.4 MAC protocol with ACK frame transmission;and a survey on backbone formation algorithms for wireless sensor networks.

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