Patent · US Active

Method and devices for communicating securely between devices

US11290262B2 · kind B2 · utility

0Cited by

2References

20Claims

0Family size

Assignee

LEGIC Identsystems AG · CH

Inventor

Martin Buck · Hersbruck, DE

Key dates

Filing date	Jul 17, 2018
Grant date	Mar 29, 2022
Priority date	—
Expiry date	Apr 17, 2039

Classification

Technology area (CPC H)Electricity
CPC primaryH04L9/083
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

For communicating securely between electronic devices using symmetric key encryption, a first electronic device transfers to a second electronic device metadata with positional information which indicates the position of a first cryptographic key in a cryptographic key hierarchy. The second electronic device derives the first cryptographic key by way of a one-way function from a second cryptographic key stored in the second electronic device, using the positional information received from the first electronic device. Subsequently, the first electronic device and the second electronic device communicate data securely with symmetric key encryption using the first cryptographic key.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.