公开(公告)号：US20230020838A1

公开(公告)日：2023-01-19

申请号：US17374900

申请日：2021-07-13

申请人： Microsoft Technology Licensing, LLC

发明人： Stavros VOLOS ,  Colin DOAK ,  Simon Douglas CHAMBERS ,  David RUGGLES ,  Richard NEAL ,  Cédric Alain Marie FOURNET ,  Kapil VASWANI ,  Balaji VEMBU

IPC分类号： G06F21/57 ,  G06F9/4401

摘要： In various examples there is a computing device comprising: a first microcontroller comprising a first immutable bootloader and first mutable firmware. The first immutable bootloader uses a unique device secret burnt into hardware of the computing device in order to generate an attestation of the first mutable firmware. The computing device has a second microcontroller. There is second mutable firmware at the second microcontroller. There is a second immutable bootloader at the second microcontroller which sends a measurement of the second mutable firmware to the first immutable bootloader whenever the second microcontroller restarts, such that the first microcontroller is able to include the measurement in the attestation.

公开(公告)号：US20240086542A1

公开(公告)日：2024-03-14

申请号：US18508208

申请日：2023-11-13

申请人： Microsoft Technology Licensing, LLC

发明人： Stavros VOLOS ,  Colin DOAK ,  Simon Douglas CHAMBERS ,  David RUGGLES ,  Richard NEAL ,  Cedric Alain Marie FOURNET ,  Kapil VASWANI ,  Balaji VEMBU

IPC分类号： G06F21/57 ,  G06F9/4401

CPC分类号： G06F21/572 ,  G06F9/4405 ,  G06F2221/033

摘要： In various examples there is a computing device comprising: a first microcontroller comprising a first immutable bootloader and first mutable firmware. The first immutable bootloader uses a unique device secret burnt into hardware of the computing device in order to generate an attestation of the first mutable firmware. The computing device has a second microcontroller. There is second mutable firmware at the second microcontroller. There is a second immutable bootloader at the second microcontroller which sends a measurement of the second mutable firmware to the first immutable bootloader whenever the second microcontroller restarts, such that the first microcontroller is able to include the measurement in the attestation.