公开(公告)号：US20140250290A1

公开(公告)日：2014-09-04

申请号：US13781852

申请日：2013-03-01

Applicant: ST-ERICSSON SA

Inventor： Per Ståhl ,  Håkan Englund ,  Hans Holmberg

IPC: G06F9/44

CPC classification number: G06F9/4401 ,  G06F21/575 ,  H04L9/0897 ,  H04L9/3247

Abstract: A temporary anti-rollback table—which is cryptographically signed, unique to a specific device, and includes a version number—is provided to an electronic device requiring a replacement anti-rollback table. The table is verified by the device, and loaded to memory following a reboot. The memory image of the table is used to perform anti-rollback verification of all trusted software components as they are loaded. After booting, the memory image of the table is written in a secure manner to non-volatile memory as a replacement anti-rollback table, and the temporary anti-rollback table is deleted. The minimum required table version number in OTP memory is incremented. The temporary anti-rollback table is created and signed using a private key at authorized service centers; a corresponding public key in the electronic device verifies its authenticity.

Abstract translation: 向需要更换防折返表的电子设备提供临时防折返表，该表被加密地签名，并且包括特定设备，并且包括版本号。 该表由设备验证，并在重新启动后加载到内存。 表的内存映像用于在所有受信任的软件组件加载时对所有受信任的软件组件进行反卷回验证。 引导后，表的内存映像以安全的方式写入非易失性存储器作为替换的反滚动表，并且删除了临时防回滚表。 OTP内存中最小的所需表版本号增加。 在授权服务中心使用私钥创建和签名临时防折返表; 电子设备中的相应公钥验证其真实性。