5.1 總結
本論文提出一個兼具穩定性與安全性的 IA 隨意網路分群架構，其貢獻主要 包含了安全性、穩定性與方便性三方面。其安全性貢獻如下：
(1) 利用 WPS Root Server 的設計和節點初始註冊動作，確保惡意/非法節點無 法輕易偽裝成拓墣建立前的初始合法節點，以在分群隨意拓墣成型前混入網 路中。
(2) 分群時節點間相互產生的 Diffie-Hellman session key 使惡意/非法節點無 法偽造身分加入群集、或非法創立群集。
(3) HMAC 和 Timestamp 的設計確保各類封包的認證、時效性與完整性 (4) 導入 WPS 註冊程序確保 IA 節點註冊時 Credential 發放的隱密性
穩定性的貢獻則下所述：
(1) 分群式隨意拓墣架構符合 IA 設備能力不對等的情境，讓能力較強的適當節 點擔任群集領導者(Leader Node)，並管理附近的節點，此乃較有效率的作 法。
(2) Seed Leader Node 機制設計既符合 IA 的特性，又能保證 Leader Node 電供 給，保證隨意拓墣部分群集的永續運作。
(3) IAdNCA 演算法考量到距離、節點剩餘電能、Degree 等因素，選擇出來 的 Leader Node 所組成的拓墣可延長運作時間，增加拓墣壽命。
(4) Strong Gateway Node 評斷機制強化跨群集通訊的穩定性，降低群集被孤立 的可能性。
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最後，方便性的貢獻為導入 WPS 註冊流程，令不具備良好 UI 的 IA 設備，能以幾 乎自動的方式加入拓墣網路並得到 Credential，讓使用者在 IA 設定上的困難降 到最低。
雖然本論文提出之分群架構具有以上貢獻，卻仍有限制及待改進之處，列舉 如下：
(1) 礙於 IA 設備的效能考量，Initial Phase 中 WPS 註冊程序所發配給初始合 法節點之 Credential 內含相同的對稱式金鑰(g_session_key, secret)，而 非安全性更強的非對稱金鑰組合。因此，Authentication 步驟執行上 的安全性將會降低。
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