Patent ID: 11936631
Assignee: VIACCESS
Field: Digital communication (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A computer-assisted maintenance method for a device within a system which comprises a first system, an operating system, and a second system,
wherein the first system comprises a storage for operational data associated with the operating system, which are stored progressively when in use,
wherein the operating system comprises the device to be maintained,
wherein the said first and second systems being adapted to communicate with each other according to a communication protocol, and
wherein the second system is configured to implement a maintenance process identified by a maintenance process identifier by applying a maintenance processing algorithm to a set of operational data to obtain at least one item of predictive or corrective maintenance information for the device to be maintained,
the method comprising:
obtaining a modified maintenance processing algorithm computed by a homomorphic or partially homomorphic cryptosystem, to allow obtaining, without implementing a cryptographic operation, the said at least one predictive or corrective maintenance information in encrypted form, from a set of protected operational data comprising a first subset of data of the said set of encrypted operational data using a homomorphic or partially homomorphic cryptosystem encryption method, and a second subset of data in plain text of the said set of operational data,
implementing the said modified maintenance processing algorithm on the second system from a first subset of encrypted operational data and a second subset of plain operational data obtained from the first system.