Device and method for generating a random bit sequence
AssigneeSiemens Aktiengesellschaft
InventorMarkus Dichtl
Life of this patent
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Abstract
A device (1) for generating a random bit sequence has a digital ring oscillator circuit (2) having at least one first feedback path (R8) and one second feedback path (R14). To this end, a changeover is performed between the feedback paths (R8, R14) at times which can be predetermined, and a random signal (OS) having a random level history can be tapped at an output node (4) of the ring oscillator circuit (2).
Claims23
A device for generating a random bit sequence comprising a digital ring oscillator circuit, having at least one first feedback path and a second feedback path, and being designed such that at predeterminable times a switchover occurs between the feedback paths, wherein a random signal with a random level history can be tapped at an output node of the ring oscillator circuit.
A method for providing a random number, comprising using of a digital ring oscillator circuit with at least a first feedback path and a second feedback path, wherein a respective feedback path being switched over a predeterminable number of times, wherein a random signal with a random level history can be tapped at an output node of the ring oscillator circuit, to generate at least one random bit.
A method for generating a random bit sequence, comprising:
- depending on a level history of a random signal tapped at a digital ring oscillator circuit, determining random bit values, wherein the digital ring oscillator circuit having at least one first feedback path and a second feedback path, and at predeterminable times a switchover taking place between the feedback paths, wherein a random signal with a random level history can be tapped at an output node of the ring oscillator circuit.
Dependencies are inferred from the claim text.