近年來各式各樣的即時通訊軟體相繼崛起發展，使得人與人之間的互動更加便利。即時通訊軟體不僅為人們帶來更便捷的交流方式，也造成使用者對安全和隱私的擔憂越來越大。本篇論文將著重在台灣使用率較高的即時通訊軟體LINE、Messenger及由國內開發的即時通訊軟體SKI+進行通訊時之資訊安全議題進行分析及研究，透過網路封包分析、檔案分析及資料庫分析等3種分析方法，澈底瞭解在網路傳輸及行動裝置內部儲存空間中所能發現的資訊，以保證即時通訊軟體在傳輸訊息及在儲存上的安全性，提供使用者去判斷及評估即時通訊軟體的使用與否，以降低自身使用即時通訊軟體的風險。

In recent years, various instant messaging applications have successively emerged and developed, making interpersonal interactions more convenient. Instant messaging applications not only bring people a more convenient way to communicate but also raise concerns among users regarding security and privacy. This paper will focus on analyzing and researching information security issues during communication on three instant messaging applications: widely used in Taiwan—LINE, Messenger, and the domestically developed SKI+. Through three analysis methods—network packet analysis, file analysis, and database analysis—the study aims to thoroughly understand the information that can be discovered in network transmissions and the internal storage space of mobile devices. This analysis aims to ensure the security of message transmission and storage on instant messaging applications. By providing users with the means to assess and evaluate the usage of instant messaging applications, the paper aims to reduce the risks associated with using these applications.

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