Won-Hyuk Choi

Data Security Technology for the Desktop Virtualization Environment using the Graphic Offloading

This paper proposes the data security technology for the desktop virtualization environment using the separated software execution method. In the virtual environment where allocates separate VMs to the users, there is a benefit that the programs in one guest machine are isolated from the programs running in another guest machine, whereas in the separated execution environment that supports application virtualization, the isolation is not offered and it causes the data security problem because the applications are executed by the one root privilege in the server. To solve this problem, we provides the data security method using the server storage filter, the viewer filter, and the file mapping table in this paper.

Performance analysis of multicast protocols over QosMIC method

Recently there have been many requirements for reliability from the multicast communication services that have peer-to-multiple or multiple-to-multiple connecting ability unlike the previous peer-to-peer communications. multimedia applications require more efficient multicast protocols as well as broadband network connection, real-time transmission. To the requirement, the quality of service sensitive multicast Internet protocol (QosMIC) is urged to be used in Internet. The QosMIC is in distinction from the existing protocols in that the QosMIC presents data in advance. This paper analyzes the QosMIC and other mulitcast by using objective and practical bandwidths in transferring data packets, and measures their performances on a simulation to test such bandwidths.

A study on the increasing throughput by smoothing handoff at mobile internet

In this study, during the handoff in mobile IP a condition is observed what the most suitable performance is appeared to use network Simulator(NS-2. lb7a). First, performance are compared the case of FA with buffer with the case ofF A without buffer. Second, by estimating the difference of performancewith the number of MN, the condition which the most suitable performance is appeared and smooth handoff can be practiced is drawn. If the result is applied to mobile Internet in common use and wireless network is constructed, mobile network can be constructed efficiently with cheaper investment price.