Microsoft Technology Licensing, LLC

Richard Neal

Stavros Volos

Simon Douglas Chambers

Balaji Vembu

Colin Doak

David Ruggles

Kapil Vaswani

Cédric Alain Marie Fournet

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.

Measured restart of microcontrollers

Growing community of inventors

Bristol, United Kingdom

Richard Neal