Effiziente Cloud-Basierte Berechnung des Medians unter Verwendung von Homomorpher Verschlüsselung

Details

Veröffentlichungs-Nr.

EP3703309

Aktenzeichen

EP19211186

Anmeldetag

25. November 2019

Veröffentlichung

28. August 2024

Erteilung

28. August 2024

Rechtsraum

EP

IPC

H04L9/30H04L9/00

Abstract

A server receives a corresponding data value encrypted using a common threshold public key from each of a plurality of clients. The server distributes the received data values to the clients for evaluating comparison of values. The server receives the encrypted comparison results from each of the clients in response to the distribution of the received encrypted data values. The comparison results are encrypted using the common key. The server homomorphically determines a ciphertext encrypting the rank of each client's data value using the comparison results. Further, the server can compute a ciphertext encrypting the median of the datasets. Thereafter, the server can initiate a threshold decryption to generate a final result.

Anmelder

Firma

SAP SE

Land

🇩🇪 Deutschland

Fachgebiete