US Patent 10037436 Device using secure storage and retrieval of data

An appliance is capable of storing and processing data related to details surrounding its ownership, behavior, and history within itself in a secure and unalterable way. The appliance may experience multiple transfers in ownership during its lifetime. Certain data stored in the appliance may be encrypted such that only qualifying parties (e.g., owners) may be able to access the data. Some data may remain private to an individual owner while other data may be made available to subsequent owners by passing a shared secret that can be utilized to decrypt the other data. Data may be stored in the appliance in chronological order and may be signed by appropriate parties such that it is not possible to alter the data without detection.