A Firmware Update Architecture for Internet of Things Devices
2019
Vulnerabilities with Internet of Things (IoT) devices have raised the
need for a solid and secure firmware update mechanism that is also
suitable for constrained devices. Incorporating such update mechanism
to fix vulnerabilities, to update configuration settings as well as
adding new functionality is recommended by security experts. This
document lists requirements and describes an architecture for a
firmware update mechanism suitable for IoT devices. The architecture
is agnostic to the transport of the firmware images and associated
meta-data. This version of the document assumes asymmetric
cryptography and a public key infrastructure. Future versions may also
describe a symmetric key approach for very constrained devices.
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