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

Claim 9:
10. A system which comprises a device to be maintained by a computer-assisted maintenance method, the system comprising:
a first system adapted to store operational data associated with the said operating system, progressively when in use,
an operating system comprising the device to be maintained, and
a second system adapted to implement a maintenance processing method, wherein the said first and second systems are adapted to communicate with each other according to a communication protocol, and
for a maintenance processing method identified by a maintenance process identifier to be implemented by the second system by applying a maintenance processing algorithm to a set of operational data in order to obtain at least one item of predictive or corrective maintenance information of the said device to be maintained, modules configured to:
calculate, using a homomorphic or partially homomorphic cryptosystem, a modified maintenance processing algorithm to enable the said at least one predictive or corrective maintenance information to be obtained in encrypted form without implementing a cryptographic operation, from a protected operational data set comprising a first subset of data of the said operational data set encrypted by a homomorphic or partially homomorphic cryptosystem encryption module, and a second subset of plain data of the said operational data set
implement 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.