Apparatus and method for generating random bits

US9236865B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Pascale Böffgen · Munich, DE
• Markus Dichtl · Birkenfeld, DE

Key dates

• Filing date: May 2, 2014
• Grant date: Jan 12, 2016
• Expiry date: May 2, 2034

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03K19/0008
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

An apparatus for generating random bits includes a plurality of mapping devices. A respective mapping device is configured to map a predefined number of input signals, with the aid of a combinatorial mapping, into a predefined number of output signals. The plurality of mapping devices are concatenated with one another, and at least one combinatorial mapping is configured such that a state change of an input signal of a respective mapping device is mapped on average onto more than one output signal of the respective mapping device. No feedback loop is present such that a state change of at least one feedback output signal of a specific mapping device is fed as a state change of at least one input signal to another mapping device such that one or a plurality of output signals of the specific mapping device is influenced by the state change of the feedback output signal.