Method of generating a cryptographic key, network and computer program therefor
US8495373B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 8, 2009 |
| Grant date | Jul 23, 2013 |
| Priority date | — |
| Expiry date | Feb 3, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/805
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The present invention relates to security systems for communication networks. More precisely, the invention relates to a method for generating a shared key between a first node (D1) and a second node (D2) for secure communication in a network (1), the first node storing a first node keying material share based on a root keying material and the method comprising the following steps: a) the first node receiving an identifier of the second node, b) the first node evaluating the first node keying material share at a second node's identifier, to generate the shared key, wherein the first node keying material share is a polynomial-based keying material over a finite field Fq and step b) comprises: b1) the first node applying a Horner's rule to factorize the first node keying material under the form of a combination of monomials, b2) the first node computing the result of each monomial operation by evaluating at a predetermined point a polynomial of degree r−1 with coefficients in a sub-field of Fq. The invention also relates to a network and a computer program thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.