To provide a provisioning system capable of providing a valid device with valid provisioning data and preventing intrusion of an unauthorized device.
A device provisioning system that provides a device 4 with provisioning data for provisioning the device 4 includes: public key providing means configured to acquire a first public key unique to the device 4 from a blockchain 2 storing the first public key in association with a first trail in response to a query using the first trail; and provisioning data providing means configured to acquire the first public key through the public key providing means in response to a query using the first trail from the device 4 and transmit the provisioning data encrypted with the first public key to the device 4.