Digital Content Delivery Research Articles

Joint Watermarking Scheme for Multiparty Multilevel DRM Architecture

Multiparty multilevel digital rights management (DRM) architecture involving several levels of distributors in between an owner and a consumer has been suggested as an alternative business model to the traditional two-party (buyer-seller) DRM architecture for digital content delivery. In the two-party DRM architecture, cryptographic techniques are used for secure delivery of the content, and watermarking techniques are used for protecting the rights of the seller and the buyer. The cryptographic protocols used in the two-party case for secure content delivery can be directly applied to the multiparty multilevel case. However, the watermarking protocols used in the two-party case may not directly carry over to the multiparty multilevel case, as it needs to address the simultaneous security concerns of multiple parties such as the owner, multiple levels of distributors, and consumers. Towards this, in this paper, we propose a joint digital watermarking scheme using Chinese remainder theorem for the multiparty multilevel DRM architecture. In the proposed scheme, watermark information is jointly created by all the parties involved; then a watermark signal is generated out of it and embedded into the content. This scheme takes care of the security concerns of all parties involved. Further, in the event of finding an illegal copy of the content, the violator(s) can be traced back.

Heterogeneous Multicore SoC With SiP for Secure Multimedia Applications

A heterogeneous multicore system-on-chip (SoC) has been developed for high-definition (HD) multimedia applications that require secure DRM (digital rights management). The SoC integrates three types of processors: two specific-purpose accelerators for cipher and high-resolution video decoding; one general-purpose accelerator (MX); and three CPUs. This is how our SoC achieves high performance and low power consumption with hardware customized for video processing applications that process a large amount of data. To achieve secure data control, hardware memory management and software system virtualization are adopted. The security of the system is the result of the cooperation between the hardware and software on the system. Furthermore, a highly tamper-resistant system is provided on our SiP (System in a package), through DDR2 SDRAMs and a flash memory that contain confidential information in one package. This secure multimedia processor provides a solution to protect contents and to safely deliver secure sensitive information when processing billing transactions that involve digital content delivery. The SoC was implemented in a 90 nm generic CMOS technology.

Workflow and asset management for retail marketing and merchandising in the era of hyper-localization and micro-messaging – An Interview with Doug Liles of Enterprise Solutions

Michael Moon and Doug Liles discuss the future of Digital Content Delivery for Retail Marketing and Promotion in an ever more mobile and local world.

Meta-Data Application in Development, Exchange and Delivery of Digital Reusable Learning Content

An international association advancing the multidisciplinary study of informing systems. Founded in 1998, the Informing Science Institute (ISI) is a global community of academics shaping the future of informing science.

A Trust-Scheme-Based DRM Model for P2P System

With the maturation of P2P technology, there are more and more challenges to the protection of digital rights. DRM for traditional Client/Server model can not satisfy the requirement of digital right protection of P2P network. With practical application of P2P network technology and new generational DRM technology, the article proposes a DRM model for P2P system based on trust degree. The proposed model shares the secret key to the trusty peers and affords necessary security ensure for digital content delivery based on P2P technology. Mathematic analyses and simulations show that, compared to the current DRM model, the proposed model is more robust toleration of transmit and security.

A trust scheme based DRM model for P2P system

With the maturation of P2P technology, there are more and more challenges to the protection of digital rights. DRM for traditional Client/Server model can not satisfy the requirement of digital right protection of P2P network. With practical application of P2P network technology and new generational DRM technology, the article proposes a DRM model for P2P system based on trust degree. The proposed model shares the secret key to the trusty peers and affords necessary security ensure for digital content delivery based on P2P technology. Mathematic analyses and simulations show that, compared to the current DRM model, the proposed model is more robust toleration of transmit and security.

Utility model for on-demand digital content

Rapid and converging technological advances in computing, communications, and consumer electronics have caused an explosion in the generation, processing, storage, transmission, and consumption of enormous amounts of digital content. Analysts expect these trends to accelerate in the near future and to have profound effects on content delivery and consumption. The term content generally refers to movies, songs, news, or educational material that spans various application domains, including personal entertainment, business, and education and training. The technology model currently used to supply this content seems inefficient and ineffective today. Newer models must be developed to support the ubiquitous, transparent, and cost-effective on-demand delivery of digital content, as driven by user preferences. We propose a content-utility system model for digital content delivery and consumption that resembles traditional utilities such as electrical power and water supply systems.

Toward an electronic marketplace for higher education

The availability of digital content has created opportunities for universities and publishers to improve the marketplace. Google lets users search a world of information in a second, and Amazon promotes a user community by publishing users' product evaluations and recommendations. These models motivate an education electronic marketplace (ede-marketplace) as well as reshape how academic institutions view information discovery, evaluation, and acquisition. A case study of a MERLOT-IBM prototype shows framework for the secure creation, management, and delivery of digital content for education and offers insights into service requirements.

SDCDS: 지연시간을 개선한 디지털콘텐트 전송 시스템

중앙집중 구조의 멀티미디어 디지털콘텐트 서비스에서는 서버의 과부하 문제와 네트워크 트래픽의 급격한 증가 문제가 발생한다. 최근에는 이러한 문제점을 해결하기 위한 디지털콘텐트 전송기술로 CDN에 대한 연구가 활발히 진행되고 있다. 본 연구에서는 디지털콘텐트의 전송 및 관리 시스템에서, 보안성능과 처리지연시간을 개선한 시스템인 SDCDS(Secure Digital Content Delivery System)을 설계하였다. SDCDS에서는 CDN에서의 보안성과 이에 따른 처리 지연시간 개선을 목적으로 하고 있다. 이를 위해서는 보안방식과 캐싱 방식을 CDN의 구조적 특성을 고려하여 설계하여야 한다. SDCDS에서는 공개키 기반 보안 방식을 CDN의 구조적 특성을 반영하도록 설계하였고, 암호화된 DC와 일반 DC의 그룹별 캐싱 방식의 향상된 캐싱 성능을 통해 처리 지연시간을 개선하였다. 또한 실험을 통해 제안 시스템의 성능을 평가하였다. Generally, the overloaded server problem and the rapidly increased network traffic problem are happened in a center concentrated multimedia digital content service. Recently, a study about the CDN which is a digital content transmission technology to solve these problems are performed actively. In this study, we proposed the SDCDS which improved a process latency time and a security performance on a digital content delivery and management. The goal of the SDCDS is the digital content security and the improvement of the processing time. For that, we have to design the security and the caching method considering the architecture characteristics of the CDN. In the SDCDS, the public key encryption method is designed by considering the architecture characteristics of CDN. And we improved the processing latency time by improved the caching method which uses the grouped caching method on the encrypted DC and the general DC. And in the experiment, we veryfy the performance of the proposed system.

MPEG-21의 DRM 기술 표준화 현황 분석

MPEG-21은 상호운용성이 확보되고 저작권이 보호되는 방법으로 디지털 콘텐츠가 생성, 배포, 소비될 수 있도록 하기 위한 개방형 표준 프레임워크이다. 이 글은 DRM 기술을 중심으로 MPEG-21의 각 분야별-거래와 배포의 기본단위인 디지털 아이템 선언(DID), 디지털 아이템 식별(DII), 저작권 관리 및 보호(IPMP), 권리데이터사전(RDD), 권리표현언어(REL), 영구연결기술(PAT), 이벤트 리포팅(ER)-기술 표준화의 개념과 내용을 살펴본다. MPEG-21 is an open standard framework for creation, delivery and consumption of digital content in interoperable and rights-managed and protected way. Focusing on DRM technologies, this paper covers with concept and ongoing activities of MPEG-21's parts - Digital Item Declaration which is the base unit of trade and delivery, Digital Item Identification, Intellectual Property Management & Protection, Rights Data Dictionary, Rights Expression Language, Persistent Association Technology, Event Reporting, and so on.

Securing the delivery of digital content over the Internet

This paper looks at the security issues that arise for the browsing, selection and delivery of digital content over the Internet. Particular emphasis is placed on the problems of finding security solutions for microtransactions (small items of content) and micropayments (low-value content), and the digital rights management issues concerning the protection of content after it has been delivered to consumers. The paper concludes with a description of the secure content delivery system developed during the SIBIS project, which addresses many of the issues raised.

Editor's note

Editor's Note: Welcome to Issue 3.2 This issue starts off with an article by Pier Luca Lanzi and Alessandro Strada in which they study the results of the second Trading Agent Competition (TAC-01). Through statistical analysis of the public data available about the competition, Lanzi and Strada are able to show that the TAC game qualitatively (but not quantitatively) succeeds at differentiating among agent strategies. The second article, by Indrajit and Inkdrakshi Ray, provides a survey of results in the study of fair exchange models. Fair exchange mechanisms provide a means by which two parties involved in a transaction can be sure that (a) either both parties get their due, or neither do, or (b) evidence is collected to prove which party violated the contract. The paper by Srinivasan Jagannathan and Kevin Almeroth presents an overview of some of the issues related to pricing digital content on the Internet. It is well known that building a business model based on the delivery of digital content is challenging because the marginal cost of delivering to one more customer tends to zero. Finally, Kah-Sing Chan presents a study of the usability of electronic storefronts. The study is based on an analysis of the navigational organization of the web site and survey data collected from web site users. The findings suggest that retailers have a long way to go towards adopting proven, usable designs for their sites. Enjoy, Peter Wurman, Editor-in-Chief

Reflection as a mechanism for software integrity verification

The integrity verification of a device's controlling software is an important aspect of many emerging information appliances. We propose the use of reflection, whereby the software is able to examine its own operation, in conjunction with cryptographic hashes as a basis for developing a suitable software verification protocol. For more demanding applications meta-reflective techniques can be used to thwart attacks based on device emulation strategies. We demonstrate how our approach can be used to increase the security of mobile phones, devices for the delivery of digital content, and smartcards.