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CFCA Security Application Development Kit 中国金融认证中心给中国银联商务定制开发的数字证书下载应用程序扩展，适用于最新版Google浏览器。中国银联商务业务系统集成该数字证书下载应用程序扩展，用户安装该数字证书下载应用程序扩展后，可在中国银联商务业务系统中通过此证书下载应用程序调用USBKEY生成PKCS10证书请求文件、将中国银联商务业务系统签发的X509数字证书安装到用户USBKEY，实现在中国银联商务业务系统下载数字证书到用户的USBKEY业务需求。
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