Patent ID: 9720957
Date: 2017-08-01
CPC Classifications: G01D,G06F,H04L,Y02B,Y04S

Claim:
1. An aggregator node device for use in a network having a plurality of nodes, wherein said aggregator node is configured to aggregate encrypted data, and comprises a secure element which is configured to perform the aggregation of the encrypted data in a secure manner by receiving the encrypted data from multiple other nodes in the network where each other node encrypted its own data and added noise, decrypting the encrypted data which was received from each of the multiple other nodes, using a first cryptographic key into an unencrypted plain text form, aggregating the decrypted data, and encrypting the aggregated data using a second cryptographic key, wherein the unencrypted plain text form is only available in a highly secured piece of hardware in the secure element.