Patent ID: 11934164
Assignee: AXIS AB
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 10:
11. A method for securely initiating and confirming remote resetting of a device to factory default settings, the device comprising an electric circuit adapted to carry out the factory default reset and a secure processing and storage environment, SPSE, the SPSE being configured for communicating with at least one remote unit via a network, and for communicating with the electric circuit via a communication channel, the method comprising:
receiving, at the SPSE of the device, a current request originating remote from the unit to reset the device to factory default settings and a challenge associated with the current request, wherein the current request and the challenge are received via the network;
after receiving the current request, initiating, by the SPSE of the device, a reset to factory default settings of the device by communicating with the electric circuit via the communication channel;
determining a response to the challenge through a function stored in the SPSE of the device, wherein the response to the challenge is associated with the current request;
checking by the SPSE of the device, that the factory default reset has been carried out;
sending, by the SPSE of the device, a confirmation via the network to the remote unit, wherein the confirmation includes the response to the challenge as produced by the SPSE and an attestation report, the attestation report being a declaration by the SPSE that the SPSE has checked that the factory default reset has been carried out; and
in response to a verification that no confirmation report is received by the remote unit or the response to the challenge is incorrect, indicating that the device may be corrupted by an attacker.