When the users apply for the license, the system uses digital signatures, content Hash value verification, encryption key storage, user certificates, the binding of licenses and terminal equipment and other security technology to ensure the process of license download and use security. 用户申请许可证下载时,使用数字签名,内容Hash值验证,密钥加密存储,用户证书,许可证与终端设备绑定等多种安全技术,保证许可证下载和使用过程中的安全性。