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頁籤選單縮合
題 名 | An Integration Design of Compression and Encryption for Biomedical Signals=一個對生醫訊號壓縮與加密的整合設計 |
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作 者 | 繆紹綱; 陳世澤; 林志龍; | 書刊名 | Journal of Medical and Biological Engineering |
卷 期 | 22:4 2002.12[民91.12] |
頁 次 | 頁183-192 |
分類號 | 410.1644 |
關鍵詞 | 壓縮; 心電圖; 加密; 醫學影像; 遠距醫療; Compression; ECG; Encryption; Medical images; Telemedicine; SPIHT; AES; |
語 文 | 英文(English) |
中文摘要 | 利用通訊與資訊技術來傳輸生醫訊號的遠距醫療系統已逐漸實現。不論是在緊急救治或是健康看護,在有限的通道頻寬下使用壓縮技術都有其必要性。此外,經壓縮之生醫訊號在像網際網路這種公開通道中傳送時,其隱私與安全也會是一個重要的課題。 SPIHT (set partitioning in hierarchical trees)是近年來被提出且效能非常優異的生醫訊號壓縮法,而AES(Advanced Encryption Standard)則是最近被提出的最新一代資料加密標準。一般而言,資料壓縮與加密被視為兩種個別或獨立的研究領域,或在通訊系統中被視為不同的建置區塊。然而在此篇論文中,二者將被一起考慮。我們提出結合SPIHT與AES的部分加密演算法。在此方法中,壓縮的SPIHT位元流依其對訊號品質的重要性加以區別,接著採用AES來加密由使用者自行定義與選取的重要部分。因此所提出的方法有加密可調性的優點。由心電圖與醫學影像的實驗中顯示,即便只針對很小部分的壓縮資料加密,所提出之方法仍有顯著的安全保護,結果節省了相當多的處理時間。 |
英文摘要 | A telemedicine system using communication and information technology to deliver biomedical signals for long-distance medical services has become reality. In either the urgent treatment or ordinary health care, it is necessary to compress the signals for the efficient use of bandwidth. In addition, when compressed biomedical signals or data are delivered over a public channel such as the Internet, their privacy and security would also be an important issue. The SPIHT (set partitioning in hierarchical trees) is shown recently as an excellent biomedical signal compression method, and the AES (advanced encryption standard) is the state-of-the-art data encryption standard. Data compression and encryption are normally treated as two separate and independent research areas or building blocks in a communication system. However, they are jointly considered in this paper, where we propose a partially encrypting scheme combining SPIHT and AES. In this scheme, compressed SPIHT bit streams are identified based on their importance to signal quality. Then AES is used to encrypt only the important part that can be defined and chosen by a user. The proposed scheme has, therefore, the advantage of encryption scalability. The experiments on electrocardiogram signals and medical images show that the proposed scheme can have significant security protection even only a small portion of compressed data is encrypted, resulting in the considerable saving of processing time. |
本系統中英文摘要資訊取自各篇刊載內容。