Secure transmission of a message

Patent metadata

Field	Value
Publication number	US-9237010-B2
Application number	US-201314403907-A
Country	US
Kind code	B2
Filing date	Apr 24, 2013
Priority date	Jun 4, 2012
Publication date	Jan 12, 2016
Grant date	Jan 12, 2016

Abstract

The embodiments relate to methods and apparatuses for producing secure transmission of a message. The methods are based on production of a basic key that is used for producing respective transmitter keys for a plurality of transmitters. For the ascertainment of the receiver keys by respective receivers, the basic key is transmitted to the receivers, which for their part are able to ascertain a receiver key for checking the integrity of the message from a respective transmitter on the basis of the basic key and an identifier for the transmitter. The receiver ascertains a cryptographic checksum, which, in the course of the integrity check, is compared with a cryptographic checksum that has been produced by the transmitter and sent along by the respective message. The embodiments may be used within the context of automation and sensor networks.

First claim

The invention claimed is:

1. A method for producing a secure transmission of a message, the method comprising:
generating a base key by a key unit;
generating a sender key for at least one sender by the key unit by a key derivation function on the basis of (i) the base key, and (ii) an identifier that uniquely identifies the at least one sender;
transmitting the sender key to the at least one sender;
calculating a first cryptographic checksum by the at least one sender for…

Assignees

• Falk Rainer
• Fries Steffen
• Siemens Ag

Inventors

• Falk Rainer
• Fries Steffen

Classifications

• H04L9/0866

  Electricity · mapped topic

• H04L9/3247

  Electricity · mapped topic

• H04L9/0847 Primary

  Electricity · mapped topic

• Y04S40/20

  Cross-Sectional Technologies · mapped topic