System und Verfahren zur Effizienten und Semantisch Sicheren Symmetrischen Verschlüsselung über Kanäle mit Beschränkter Bandbreite

Details

Veröffentlichungs-Nr.

EP3163835

Aktenzeichen

EP16194164

Anmeldetag

17. Oktober 2016

Veröffentlichung

11. Dezember 2019

Erteilung

11. Dezember 2019

Rechtsraum

EP

IPC

H04L29/06H04L9/00H04L9/14H04L9/32H04L9/08

Abstract

One embodiment of the present invention provides a system for enhancing security in a secure communication channel. During operation, the system collects contextual information associated with a mobile device or a user of the mobile device and determines whether a trigger condition is met based on the collected contextual information. In response to determining that the trigger condition is met, the system performs a first type of key-ratcheting operation on a current cryptographic key to update the cryptographic key. In response to determining that the trigger condition is not met, the system performs a second type of key-ratcheting operation on the current cryptographic key to update the cryptographic key. The system then encrypts a to-be-sent message using an encryption key associated with the updated cryptographic key.

Anmelder

Firmen

Palo Alto Research Center Incorporated
Palo Alto Research Center, Incorporated

Land

🇺🇸 USA

Fachgebiete