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頁籤選單縮合
題名 | Yet Another Mechanism to Determine Relationships in a User Hierarchy=使用者階層關係的動態存取控制策略 |
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作者 | 廖鴻圖; | 書刊名 | 世界新聞傳播學院學報 |
卷期 | 6 1996.10[民85.10] |
頁次 | 頁311-323 |
分類號 | 312.49 |
關鍵詞 | 使用者階層; 關係; 算術編碼; User hierarchy; Relationship; Arithmetic coding; |
語文 | 英文(English) |
中文摘要 | 本文提出一個植基於算術編碼法的使用者階層關係動態存取控制策略。 任何兩位使用者的存取關係,可輕易地藉由所提出策略的數學函數求出。並 且,當任一位新使用者欲加入此系統時,本策略可快速地求算出相關金匙, 而系統內原存金匙只有最後一把可能受影響外,其餘均保持原狀。因此,本 策略適合於實際的施行上。 |
英文摘要 | In this paper, a dynamic user hierarchy mechanism based on arithmetic coding is proposed. Through careful design of keys, some economic keys are obtained. In our scheme, the relationship between two users can be easily revealed by performing a simple formula to the relative keys. In addition, whenever a new user is inserted into the user hierarchy system, the corresponding keys can be determined quickly without changing the existing keys except the last existing key. Furthermore, the keys proposed by us are drastically reduced than the previous work. Therefore, our scheme is flexible and practical for implementation. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。