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題名 | 植基於離散對數之職務代理簽章機制之研究=The Research of Proxy Signature Scheme Based on Discrete Logarithm |
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作者姓名(中文) | 孫屏臺; 林志麟; 陳正鎔; | 書刊名 | 國防管理學報 |
卷期 | 22:1 2001.04[民90.04] |
頁次 | 頁29-35 |
分類號 | 312.76 |
關鍵詞 | 數位憑證; 代理簽章; 時戳; 職務代理; 數位簽章; Digital certification; Proxy signature; Time stamp; Digital signature; |
語文 | 中文(Chinese) |
中文摘要 | 數位憑證可用來代替個人身份在電腦網路所構建的虛擬世界中之識別及驗證。而代理簽章機制則讓授權者能在不洩露個人私鑰之情形下,委託代理者代為處理其業務。一般的代理簽章機制【4,5,7,9,10】基本上必須具有私密性、辨識性、安全性與不可否認性等特性。而已提出的代理簽章機制往往著重於如何讓接收者能驗證代理簽章的真偽,如何增強代理簽章機制的安全性或將代理行為以委託書的方式公諸於世,使代理者之能遂行其所代理之職務。前述之方法,其代理者在獲得一次合法之授權後,即可無限的使用其代理權力,除非授權者更動密碼或是另行公告其授權時間,否則無法限制代理者之權力。本文提出一套在無須授權委託書之前提下,讓授權者在委託授權時能一併訂定授權時間的代理簽章機制,使接收者可驗證代理簽章的真偽性,並同時檢查此代理簽章是否仍在授權的期限,有效解決代理者在非授權時間內非法使用代理簽章權力之問題。 |
英文摘要 | Digital certification can be used to substitute personal identification and verification of virtual would which was constructed by computer networks. And, proxy signature scheme can authorize proxy substitute the job in the condition of unleaking private key. Basically, proxy signature scheme have to pose the feature of privacy, distinguishing, security, and undenial. The main points of traditional proxy signature scheme are: to emphasis the receiver can verify the truth of proxy signature; to enhance the security of proxy signature scheme or declare the authorized paper to show proxy can substitute the job office ially. In the above method, the defect is that once the once the proxy gained authorized paper, then, he (or she) can use the right of proxy signature unlimitedly. This paper proposed a proxy signature scheme which can solve the problem of illegal using the right of proxy signature in unauthorized time period. In our scheme, the proxy don’t have to get the authorized paper, and, the authorized person can construct the proxy signature scheme with the authorized time period. Therefore, the receiver can verify the truth of the proxy signature, and also, check the time limit of proxy signature. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。