公开(公告)号：US20220158827A1

公开(公告)日：2022-05-19

申请号：US17523013

申请日：2021-11-10

Applicant: ABB Schweiz AG

Inventor： Soeren Finster ,  Florian Kohnhaeuser

IPC: H04L9/08 ,  H04L9/32 ,  G06F8/65

Abstract: A method for protecting the integrity of measurement data acquired by a sensor includes: in response to the measurement data being acquired, determining, by the sensor, whether an aggregate value has already been generated, and: if the aggregate value has not yet been obtained, mapping, by a predetermined aggregation function that takes the measurement data as a mandatory argument and a previously generated aggregate value as an optional argument, the measurement data to the aggregate value; whereas if the aggregate value has already been obtained, mapping, by the predetermined aggregation function, the combination of the aggregate value and the measurement data to a new aggregate value; and in response to a predetermined condition being met, computing, using a secret key of the sensor, a signature of the aggregate value; and outputting the signature via a communication interface of the sensor, and/or storing the signature in a memory.