US 2012/0237031 A1 · Generating Identical Numerical Sequences Utilizing a Physical Property and Secure Communication Using Such Sequences

Abstract

Substantially identical numerical sequences known only to stations A and B are generated in a manner not subject to duplication by an eavesdropper and not subject to cryptanalytic attack because they are not derived using a mathematical function (such, as for example, factoring). The sequences are independently derived utilizing a physical phenomena that can only be “measured” precisely the same at stations A and B. Signals are simultaneously transmitted from each station toward the other through a communication channel having a characteristic physical property capable of modifying the signals in a non-deterministic way, such as causing a phase shift. Each signal is “reflected” by the opposite station back toward its station of origin. The effect of the communication channel is “measured” by comparing original and reflected signals. Measured differences are quantized and expressed as numbers.

Claims26

Dependent claims

A method, comprising:

receiving a reflected signal, wherein the reflected signal is a reflected version of a first signal, the first signal having been transmitted from a first station through a communication channel capable of modifying the first signal in a non-deterministic manner;
determining a difference between the first signal and the reflected signal;
and
generating a number based on the determined difference.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

13/481,139Filed 25 May 2012

Priority

30 Sep 2008

Published

20 Sep 2012

Term ends

Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04L 9/12
Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols: transmitting and receiving…
H04L 1/0009
Systems modifying transmission characteristics according to link quality, e.g. power backoff: by adapting the channel coding
H04L 1/004
Arrangements for detecting or preventing errors in the information received: by using forward error control
H04L 9/0838
Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for…:…

Generating Identical Numerical Sequences Utilizing a Physical Property and Secure Communication Using Such Sequences

Life of this patent

Generating Identical Numerical Sequences Utilizing a Physical Property and Secure Communication Using Such Sequences

Life of this patent

Abstract

Claims26