Method for generating a secret or a key in a network

US10841085B2 · kind B2 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Timo Lothspeich · Rutesheim, DE
• Andreas Mueller · Kaufbeuren, DE

Key dates

• Filing date: Apr 13, 2016
• Grant date: Nov 17, 2020
• Expiry date: Jun 22, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L2209/84
• WIPO field: Digital communication
• WIPO sector: Electrical engineering

Abstract

Disclosed is a method for generating a secret or key in a network having first and second subscribers and a transmission channel therebetween. The first and second subscribers generating first and second sequences of subscriber values to achieve synchronous transmission; and the first and second subscriber each generate a common secret, the first subscriber doing so based on information about the first sequence and a superposition of the second sequence onto the first sequence on the transmission channel, and the second subscriber doing so based on information about the second sequence and the superposition of the second sequence of subscriber values onto the first sequence of subscriber values. At certain intervals or in accordance with a detected sequence of superposed values, the first or second subscriber outputs at least one filler value onto the transmission channel such that an edge change or change in values occurs on the transmission channel.