臺灣博碩士論文加值系統

摘要 大多數的傳統視覺密碼研究著重於二維的平面影像，本研究嘗試建立與實做一個以1x2像素擴張視覺密碼為基礎的三維立體模型的新視覺密碼方案，在少許的運算下就可以加密與解密三維立體模型。首先我們討論如何將三維邊緣與多邊形模型在視覺上轉換為三維點集合，接著隨機加入三維雜訊點以遮蔽三維機密點集合，接下來依據三維視覺密碼機制製造2個秘密分享立體模型，任何人拿到其中一個秘密分享立體模型，都無法看出原來的三維機密點集合，只要將兩個秘密分享立體模型疊合與去除雜訊，原來的三維機密點集合就可透過視覺辨識解密，這個機制可以安全且簡單的透過三維塑型工具加以實作，是一個三維立體模型秘密分享與傳遞的新解決方案。 本論文探討之演算法的貢獻在沒有認證中心(CA)、不用金鑰加解密的環境中，用簡單的矩陣運算即可將快速的3D模型加、解密，達成視覺資訊的機密性分享，即使是沒有密碼學知識背景的使用者也可透過本研究的方法輕易的加解密3D模型。

Chapter 1 Introduction
Chapter 2 Research Model
2.1 Visual cryptography and pixel expansion
2.2 The experimental model
2.2.1 3D secret and non-secret point shares and superposition
2.2.2 The 3D model visual cryptographic scheme
Chapter 3 System Implementation
3.1 3D Modeling Tool
3.1.1 SketchUp Introduction
3.1.2 Ruby API
3.2 System Implementation Procedure
3.2.1Model loading
3.2.2 Transforming edges into 3D point set
3.3 3Visual cryptography scheme for 3D models
3.4 Example demonstration
3.4.1 3D Bike model demonstration
3.4.2 3D DNA model demonstration
3.4.3 3D Police officer model demonstration
3.5 Experimenta Results
Chapter 4 Conclusion and Future Work
References

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