近場通訊技術的發展，使得資訊的傳遞更為即時且便利，將其應用於電子商務平台上，能夠實現以手機進行交易。既然手機能夠代表個人的身分付款，過程中必定需要高度的資訊安全，以確保資料不會在傳遞中被竊取或是身分遭到冒用。複雜的安全機制往往會產生額外的效能成本，如何達到找到合適的系統配置以達到效率與資訊安全間的平衡是相當重要的。
　　藉由系統模擬法能夠預先模擬系統運作過程以了解整體的效能狀況，卻無法得知如何調整系統配置以提升至預期效能。本研究以近場通訊應用之電子購票系統為例，建立其模擬模型以了解系統運作情形，並運用迴歸分析尋找效能指標與系統配置間的預測模式，以應用於效能提升分析上。實驗上將預測的配置數量重新模擬後與預期指標相互比較，結果顯示本研究的分析方式可以準確的將效能提升至預期標準，又不會超乎預期太多，導致建置成本的浪費。

Due to the development of Near field communication (NFC) technology, the real time payment by smartphones is available. When paying by smartphones involves the identity of customers, the personal information should be secured through the transaction process. Since higher security may degrade the system performance, the tradeoff between security requirements and system performance should be addressed.
Simulation model usually is the only option to analyze a virtual prototype of a physical system. Using an electronic ticketing system with NFC as an example, a simulation model is built to imitate the system operation. The data generated from the simulation model is analyzed by a regression model, which is further used to search for the parameter combination to reach the expected performance.

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