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研究生:廖偉妏
研究生(外文):Wei-Wen Liao
論文名稱:針對逐對加密圖片之分離式可逆資料隱藏之研究
論文名稱(外文):A Study on Separable Reversible Data Hiding for Pairwisely Encrypted Images
指導教授:張仁俊張仁俊引用關係吳信龍
指導教授(外文):Jen-Chun ChangHsin-Lung Wu
口試委員:王旭正蔡孟峰曹偉駿
口試委員(外文):Shiuh-Jeng WangMeng-Feng TsaiTsaur Woei Jiunn
口試日期:2015-06-29
學位類別:碩士
校院名稱:國立臺北大學
系所名稱:資訊工程學系
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2015
畢業學年度:103
語文別:英文
論文頁數:30
中文關鍵詞:可逆資料隱藏差值擴增圖像加密分離式
外文關鍵詞:reversible data hidingdifference-expansion-basedimage encryptionseparable
相關次數:
  • 被引用被引用:0
  • 點閱點閱:231
  • 評分評分:
  • 下載下載:2
  • 收藏至我的研究室書目清單書目收藏:0
這項研究在探討如何在一個加密圖像中建構可逆的資料隱藏方法。我們提出了新穎的分離式方法對加密圖做資料隱藏。該輸入圖像先經由兩兩一組的加密方法加密,然後利用差值擴張法來對加密後的圖像進行資料隱藏。
我們提出的分離式方法將用以下情境說明,當接收方獲取加密並隱藏資訊的檔案後,他可以通過資料隱藏密鑰提取相當接近原始圖像的檔案,此時的檔案含有隱藏的資訊。此外,若接收方擁有加密和數據隱藏密鑰,他還可以完整恢復原始圖像並提取秘密數據。在我們的實驗中,將會跟其他現有的非預留空間的分離式資料隱藏方法做比較,且結果顯示我們的藏量比他們的更好。
This work studies how to construct a reversible data hiding scheme for encrypted images.We propose a novel separable method for pairwisely encrypted images. The input image is encrypted first via a pairwise encryption scheme. Then the data bits can be embedded into the pairwisely encrypted image by the well-known difference-expansion technique.
Our proposed scheme is separable in the following sense. When the receiver gets the marked encrypted, he can extract the secret data bits by the data-hiding key and obtain an image which is similar to the original input image by the encryption key. Furthermore, he can recover the original image and extract the secret data bits once he owns both encryption and data-hiding keys. To compare the existing separable methods which do not pre-reserve space for embedding secret data, experimental results show that the proposed scheme obtains much better embedding capacity.
1 Introduction
1.1 Background
1.2 Research Motivation
1.3 Contribution of this Research
1.4 Thesis Architecture
2 The Proposed Schemes
2.1 Generation of Encrypted Images
2.2 Data embedding in pairwisely encrypted images
2.2.1 Keyed DE-based embedding algorithm of Kim et al.
2.2.2 Embedding secret bits into pairwisely encrypted images
2.3 Data Extraction and Image Recovery
2.3.1 Data extraction before image decryption
2.3.2 Image decryption after data extraction
3 Experimental Results
4 Conclusion
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[21] Miscelaneous Gray Level Images [Online]. Available:http://decsai.ugr.es/cvg/dbimagenes/g512.php
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