Azure Sphere is an application platform with integrated communications and security features developed and managed by Microsoft for Internet Connected Devices.

[8] Azure Sphere-certified chips and hardware support two general implementation categories: greenfield and brownfield.

Greenfield implementation involves designing and building new IoT devices with an Azure Sphere-certified chip.

Pluton is a Microsoft-designed security subsystem that implements a hardware-based root of trust for Azure Sphere.

It includes a security processor core, cryptographic engines, a hardware random number generator, public/private key generation, asymmetric and symmetric encryption, support for elliptic curve digital signature algorithm (ECDSA) verification for secured boot, and measured boot in silicon to support remote attestation with a cloud service, and various tampering counter-measures.