應用視覺式秘密分享技術的電子現金系統

Abstract

在電子現金系統中，如何防止盜用及防止偽造是相當重要的課題。本論文參考了W. T. Lin與G. B. Horng提出的”Using Biological Recognition Technology to Prevent Double Spending over Network”〔1〕，該文中提出了以指紋作為使用者身分認證的依據，雖然以指紋代替複雜的數學運算，的確是降低了系統複雜度，但是卻忽略了指紋對一個人的重要性是不容忽視的，若指紋不加保護的在網路上傳遞，對消費者而言，等於是將消費者赤裸裸的展示在開放式的網路環境中，而且指紋無法更改，一旦指紋被不法之徒竊用，將會造成一個永遠的傷害。有鑑於此，本論文保留了以指紋作為認證工具，再配合視覺式秘密分享技術，來完成一個安全方便的電子現金系統。因為保留了原有架構中的指紋認證，再君上了視覺式秘密分享的技術，所以原有架構的安全性不但完全保留下來，而且避免了原有系統中可能的弊端。In E-Cash system, how to prevent embezzling and forging is a quite important assignment. This article refers ”Using Biological Recognition Technology to Prevent Double Spending over Network ”(l) mentioned by W. T. Lin and G. B. Horng which indicates using fingerprints to the basis of users' identifications. Although using fingerprints to replace the complicated math calculation which reduces the complexity of system, the problem is that we cannot neglect the fingerprints to one man's importance. To the consumers, if fingerprints passed on the Internet without any protection, that is, 'put the consumers nakedly on the open Internet circumstance. And fingerprints cannot be changed, it will cause a perpetual ham if fingerprints are stealing and using by lawless persons. Because of this, this article retains using fingerprints to be the identification and harmonizing with visual secret sharing technology in order to accomplish a. secure and convenient E-Cash system. Because this way reserves the fingerprints identification of the original framework isn't only retain fully but also avoid the possible abuses of the original system.