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題名 | 以平方模數為安全基礎之層次性動態存取控制=A Dynamic Access Control Scheme with High Security Based on the Square Modular Technique in Hierarchy Structure |
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作者 | 王旭正; 胡培舜; | 書刊名 | 國立臺灣大學工程學刊 |
卷期 | 78 2000.02[民89.02] |
頁次 | 頁61-66 |
分類號 | 312.76 |
關鍵詞 | 存取控制; 階層性; 安全度; 二次剩餘; Access control; Hierarchy; Security; Quadratic residue; |
語文 | 中文(Chinese) |
中文摘要 | 在本論文中,我們將提出一種動態階層式密碼存取控制的新方法,這 種方法是將Laih and Hwang [4] 的方法加以改良,我們的方法可在增加執行速度 的同時,仍保持高度的安全性,其安全性是根基於解二次剩餘的困難度。並且使 得群組的動態新增、刪除、修改金鑰值等運算仍具有相當的彈性,只需重新計算 與變動的群組有直接關係的群組公開訊息。比較於前人的方法我們的研究使得密 碼金鑰值的計算及存取下層群組的速度更快,故更適合應用於需快速存取計算的 場合。 |
英文摘要 | In this paper, there another new method is proposed to solve the cryptographic access control in a hierarchy structure. The idea given in this paper is inspired from the previous literature [4], with our further improvement to [4], our scheme have the fast implementation in key generation and derivation in a manner that the security is still guaranteed. The security aspect used in our scheme is based on the difficulty of solving quadratic residue in a composite modular number. In our scheme, the dynamic manipulation is also discussed to have the flexibility of classes adding, deleting and updating in such a way that the public information associated with the changing class is only required to be modified. The computation time is faster than that of [4] when comparing to the key generation, and key derivation to the subordinate class. Therefore, the feature we provided enables our scheme to be more suitable to apply the environment where the fast key computation is extremely needed in a cryptographic hierarchy structure. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。