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1. 发明授权

US08560823B1 Trusted modular firmware update using digital certificate 有权
标题翻译：使用数字证书的受信任的模块化固件更新
公开(公告)号：US08560823B1
公开(公告)日：2013-10-15
申请号：US12108910
申请日：2008-04-24
申请人： Tolga Aytek , Joseph Jolicoeur , Minda Zhang
发明人： Tolga Aytek , Joseph Jolicoeur , Minda Zhang
IPC分类号： G06F9/00 , G06F15/177 , G06F11/30 , G06F12/14
CPC分类号： G06F8/654 , G06F9/4401 , G06F21/572 , H04L63/0823
摘要： An over-the-air firmware update is accomplished in a secure manner using a two-step process. The first step uses an initial boot using a fixed boot program and an authenticated and verified secondary environment to complete starting of only authenticated code. After verifying a pending update, the second step is started with the electronic device being booted into an update mode with an update loader that has exclusive access to a signing key. A dummy update image is loaded into a temporary memory location and a hash is taken. A digital certificate is created corresponding to the update image and signed using the signing key. The update and digital certificate are atomically installed and the signing key is deactivated. Upon reboot, the new image is used for operation and is verified by the hash data and public key in the digital certificate.
摘要翻译：使用两步过程以安全的方式实现无线固件更新。第一步使用固定引导程序和经过身份验证的辅助环境进行初始引导，以完成仅验证代码的启动。在验证待定更新之后，第二步开始，电子设备被引导到具有独占访问签名密钥的更新加载器的更新模式。虚拟更新图像被加载到临时存储器位置并且进行散列。创建对应于更新图像的数字证书，并使用签名密钥进行签名。更新和数字证书是原子安装的，签名密钥被禁用。重新启动后，新的图像用于操作，并通过数字证书中的散列数据和公钥进行验证。

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