Abstract: A method controls a modification of an adjustable device. A system establishes a circle of trust for a plurality of devices, where at least one of the plurality of devices is an adjustment control device for adjusting an adjustable device. Operations of the adjustment control device are controlled via a blockchain, where the blockchain must approve the adjustment control device before an adjustment of the adjustable device is performed by the adjustment control device. The system receives an approval from the blockchain for the adjustment control device to adjust the adjustable device, and the adjustment control device adjusts the adjustable device in response to receiving the approval from the blockchain.

Abstract: A method manages software images in a blockchain-based environment of trusted devices. A trusted device creates a software image for sharing among members of a set of trusted devices that includes the trusted device. A blockchain mechanism stores the software image on a virtual machine that is in communication with the set of trusted devices, where the blockchain mechanism uses the set of trusted devices as peer members of the blockchain mechanism. A trusted device from the set of trusted devices receives, via the virtual machine, an access request for the software image from a requesting device from the set of trusted devices. The blockchain mechanism authorizes the access request by providing the software image to the requesting device.