Browsing by Author "Chuang, Chen-Yuan"

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A chapter preloading mechanism for e-reader in mobile environment
(2013-05-01)
Chuang, Chen-Yuan
;
Lin, Yi-Bing
;
Ren, Zhihao Julie
;
資訊工程學系
;
Department of Computer Science
E-book is a fast growing service for mobile Internet. A user reads e-books through an e-reader that could be a dedicated reading device or a mobile application on the smartphones or the tablets. With content protection of Digital Right Management (DRM), e-books take longer chapter loading time due to necessary data decryption. This paper propose a mechanism that preloads a small number of chapters into the buffer for DRM-protected e-books. When the user reads a chapter in the buffer, our solution reduces the user waiting time without affecting existing content protection. We also analyze the buffer replacement cost and effects of the limited buffer resource. (c) 2012 Elsevier Inc. All rights reserved.
An Inter-Store Transaction Mechanism to Distribute Mobile Applications
(2012)
Chuang, Chen-Yuan
;
Chang, Hsu-Sheng
;
Hung, Yuh-Jer
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資訊工程學系
;
Department of Computer Science
Android is one of the popular OSs and application platforms for mobile devices. There are numerous appstores in the world, including Google Play and Amazon Appstore for Android. These appstores with DRM-protection and In-App Purchasing APIs provide various business models to their app developers. However, the APIs and implementations are very different among the appstores. Therefore, accommodating the mobile apps to other appstores may require extra maintenance and porting overheads. This paper proposes a mechanism that supports inter-store transactions to distribute appstore-dependent apps by slightly modifying the appstore client and service logic. Consequently, the app developers can publish their DRM-protected apps and purchasable items in the apps at once to wide markets without rewriting the programs.
Digital Right Management and Software Protection on Android Phones
(2010)
Chuang, Chen-Yuan
;
Wang, Yu-Chun
;
Lin, Yi-Bing
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資訊工程學系
;
Department of Computer Science
Android is an open mobile phone platform. To accommodate value-added services such as selling wallpapers, ringtones, applications, and games on Android phones, it is essential to ensure copyright protection on these products. This paper studies how the Android source code to implement the Open Mobile Alliance (OMA) Digital Right Management (DRM) 1.0, software installation and protection. We also identify potential leaks of Android DRM and software protection in this study.
Performance of Linear-Type Mobile Data Transmission
(2011-08-01)
Chuang, Chen-Yuan
;
Lin, Yi-Bing
;
Yeh, Yu-Tien
;
資訊工程學系
;
Department of Computer Science
In Next Generation Network (NGN), IP Multimedia Subsystem (IMS) plays an important role to offer IP-based multimedia services. Based on Chunghwa Telecom's NGN/IMS, we develop linear-type data transmission applications such as Bulletin Board System (BBS) or forum-based websites to deliver new articles to the mobile users. We propose the push-N method that pushes every N articles from the BBS server to the user. When the user actually connects to the BBS, the not-yet-pushed messages are pulled by the user. Our study indicates that by selecting appropriate N values, push-N can balance against the push and the pull operations, and therefore improves the user access experience without wasting too much network resources.
User-Generated E-Books from Facebook Contents
(2011)
Chuang, Chen-Yuan
;
Lin, Yi-Bing
;
Ren, Zhihao Julie
;
Yeh, Yu-Tien
;
資訊工程學系
Facebook platform offers rich APIs and has a huge number of users and user-generated contents. This paper presents our mobile Facebook application on Android, called DEFAC, which turns Facebook contents into an ePub file step by step. Users can therefore bring contents with them for offline-reading. We expect that the interactions of e-reader\'s users and social reading services may become new important applications for both social-network services and e-book industry in the near future.