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1. (WO2017190890) METHOD AND APPARATUSES FOR AUTHENTICATING A DATA STREAM

Pub. No.:    WO/2017/190890    International Application No.:    PCT/EP2017/057283
Publication Date: Fri Nov 10 00:59:59 CET 2017 International Filing Date: Wed Mar 29 01:59:59 CEST 2017
IPC: G06F 21/44
H04L 29/06
H04L 9/32
H04W 12/10
Applicants: SIEMENS AKTIENGESELLSCHAFT
Inventors: FALK, Rainer
Title: METHOD AND APPARATUSES FOR AUTHENTICATING A DATA STREAM
Abstract:
The invention relates to a method for generating a data stream, the transmitter of which can be authenticated. The method comprises a method step for calculating (110) at least one first item of authentication information, wherein the at least one first item of authentication information (A1) is generated from a first item of validation information (V1) in each case using a cryptographic one-way function. The method comprises a method step for storing (120) the at least one first item of authentication information (A1) in a first data element (310) of the data stream in each case. The method comprises a method step for transmitting (130) the particular first data element (310) to at least one receiver. The method comprises a method step for storing (140) the particular first item of validation information (V1) in a second data element (320) of the data stream in each case. The method comprises a method step for transmitting (150) the particular second data element (320) to the at least one receiver.