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    Please use this identifier to cite or link to this item: http://nccur.lib.nccu.edu.tw/handle/140.119/55421


    Title: 基於生體特徵與暗號的免憑證密碼系統的研究與開發
    Other Titles: A Research and Development on Biometrics and Password-Based Certificateless Cryptosystem
    Authors: 左瑞麟
    Contributors: 國立政治大學資訊科學系
    行政院國家科學委員會
    Keywords: 資訊安全;密碼學;生物認證;免憑證密碼系統;暗號
    Biometrics;Certificateless cryptosystem;Cryptography;Information Security;Password
    Date: 2008
    Issue Date: 2012-11-12 11:02:39 (UTC+8)
    Abstract: 本計畫的目的在研究與開發安全性高而且可以兼顧使用便利性的密碼系統。此密碼系統利用生體特徵(指紋)為秘密金鑰,欲加密文件或做電子簽名時,只需要將指紋輸入本計畫開發的系統中即可。利用方法和現實社會中按壓指紋或蓋印章非常相近,因此,不需複雜的操作及艱深的密碼學知識,任何人皆可輕鬆上手,完成文件加密或電子簽名。國內外對於生物特徵利用在密碼學的現行研究方面,目前仍停留在個人的身分認證上面,利用生物特徵來做明文加解密或電子簽名的可謂少之又少。其原因在於指紋等的生物特徵屬於個人隱私,而保護此個人隱私在現行的研究上有其難度(因為在現行研究中,生物特徵若做為使用者的密鑰,必須事先登錄在PKI(公開金鑰基礎結構)或系統管理者伺服器內,因此有個人隱私洩漏的問題)。本計畫利用免憑證密碼系統,除了解決了個人隱私可能洩漏的問題之外,因為認證中心不產生憑證,所以在簡化PKI 上也是值得期待的。本計畫的實現在保護個人隱私及資訊安全方面,為使用者提供了一個更安全且方便的方式。另外,本計畫的密碼理論部分,利用免憑證密碼系統為基礎。免憑證密碼系統的理論研究將為本計畫的另一項研究重點。
    The purpose of the project is to design and produce a secure and high-performance cryptographic device. The system of the device utilizes a user’s bio-information (ie., the fingerprint) as his private key. In this way, the user does not have to remember a long and high entropy private key. In addition, to sign a document or to encrypt a message can be done very easily by just scan his fingerprint into our system (using the device we produced). This is very similar to take a person’s fingerprint in real world and the user does not have to have the knowledge about cryptography. We notice that current researches about biometrics enable us to use finger to help authenticate us to a computer or network but not to help sign or encrypt a document. The difficulty of signing or encrypting a document using biometrics is the problem of personal information leakage (ie., user’s bio-information has to be registered in PKI or stored at servers previously). We solve this problem by using a certificateless cryptosystem. Our project can not only produce a secure and high-performance cryptosystem on one hand but can also protect personal information on the other hand. The theory research will focus on the certificateless cryptosystem and the development on the cryptographic device will be the final goal of the project.
    Relation: 技術發展
    學術補助
    研究期間:9708~ 9807
    研究經費:475仟元
    Data Type: report
    Appears in Collections:[資訊科學系] 國科會研究計畫

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