Tsung Hung Chen

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This paper presents a visual secret sharing (VSS) scheme for general access structures by using random grids. Compared to the existing VSS schemes for general access structures, the proposed scheme generates the shares of same size as that of the original secret image and does not require any codebook prior to encryption process. With these advantages, the(More)
Recently, owing to the fast-developing of the Internet technology, the popularity of the digital devices and the enhancement of the people's computer ability, therefore the demand of ubiquitous personal knowledge services has gradually been mature. People can use these services to collect information, solve problems and proceed e-learning. Therefore, how to(More)
During the learning process, sharing and participating is the important thing. Efficiently using the learning contents has been an active research topic in developing the educational material. It probes the environment of the learning process through Sharable Content Object Reference Model (SCORM). Peer to Peer (P2P) technology seems to be the most well(More)
With the fast development of technology and science, there come various changes and demands in consumer service market. The plan integrating "broadband network" with "application service" is potential and farsighted in network industry. Academic and technological institutes start researching and promoting the MOD (multimedia on demand) system, which(More)
Recently, many research focused on the providing efficiency and the scalable multimedia on demand (MoD) services. However, not only resources requirements for content distribution, cost of content production, as well as the user's aptitude are different from the experience we got from cable TV but also the MoD specialties of the interactive and transmedia(More)
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