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1. (WO2018132211) VERIFIED BOOT AND KEY ROTATION

Pub. No.:    WO/2018/132211    International Application No.:    PCT/US2017/066330
Publication Date: Fri Jul 20 01:59:59 CEST 2018 International Filing Date: Fri Dec 15 00:59:59 CET 2017
IPC: G06F 21/57
G06F 9/4401
H04L 9/32
H04L 29/06
Applicants: GOOGLE LLC
Inventors: DEYMONNAZ, Alejandro Martin
KRAHN, Darren David
ZEUTHEN, David
Title: VERIFIED BOOT AND KEY ROTATION
Abstract:
Methods, systems, and apparatus, including computer-readable media, for verified boot and key rotation. In some implementations, a device extracts a public key from a secure data storage area of the device. The device extracts a first certificate for an intermediate key and a second certificate for a signing key, the first certificate and the second certificate being extracted from a system image. The device verifies a signature of the first certificate using the public key. After verifying the signature of the first certificate, the device verifies the second certificate using a public key in the first certificate. In response to verifying the second certificate, the device loads the system image during a boot process of the device.