Secure Telegram Generation with Dynamic Test Data Formatting

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Solution Overview

Problem

Existing secure telegram generation systems lack flexibility in formatting the test data part, which can deviate from the expected format by receiving devices, and cannot generate secure telegrams at the user level when using coded monoprocessors, leading to potential errors and incorrect reactions.

Innovation Solution

A method where original user and test data are stored in a secure software environment, with copies generated outside, allowing for comparison to ensure accuracy, and enabling the creation of a secure telegram with user data and test data parts that can be verified at the user level, even with coded monoprocessors, by comparing data copies within the secure environment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the test data part format is predetermined in secure telegram generation systems, then security and reliability are improved, but flexibility and adaptability to different receiving devices deteriorate

Engineering Contradiction:
ImprovesecurityVSAvoidflexibility
Core Design Contradiction:
ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent implements dynamic format selection for the test data part, allowing the format to be changed based on the receiving device's capabilities. The system determines the expected format from format information and configures the test data part accordingly, transforming a static predetermined format into a dynamic adaptable format that maintains security while improving flexibility.

Inventive Principle:
Principle #15Dynamics

2Reliability

If secure telegrams are generated using coded monoprocessors, then security is improved, but the ability to generate secure telegrams at the user level deteriorates

Engineering Contradiction:
ImprovesecurityVSAvoiduser level generation capability
Core Design Contradiction:
ReliabilityVSEase of operation

Solution Approach 1:

The patent introduces an intermediary mechanism where format information acts as a mediator between the coded monoprocessor and the user level. The format information enables the user level to understand and verify the test data part structure without requiring direct access to the coded processing environment, thus bridging the gap between secure generation and user-level accessibility.

Inventive Principle:
Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent uses copying of data between secure and non-secure environments. The test data part is generated or verified at the user level by copying and comparing data structures, allowing secure telegram generation capabilities to be effectively extended to the user level through data replication and comparison techniques.

Inventive Principle:
Principle #26Copying

3Ease of operation

If data processing occurs in a non-secure software environment, then ease of operation and flexibility are improved, but error detection and security deteriorate

Engineering Contradiction:
ImproveflexibilityVSAvoiderror detection
Core Design Contradiction:
Ease of operationVSReliability

Solution Approach 1:

The patent implements feedback mechanisms where the test data part serves as a verification component that provides feedback on the correctness of the secure telegram generation. The receiving device uses the test data part to verify the integrity and correctness of the transmitted data, creating a feedback loop that enhances error detection while maintaining the flexibility of non-secure environment processing.

Inventive Principle:
Principle #23Feedback

Data Source

PatentEP3659317B1Method for providing a secure telegram
Publication Date: 2021.03.31 SIEMENS MOBILITY GMBH
  • EP3659317B1 patent drawingFigure 1

AI summary

The invention relates to a method (1) for generating a secure telegram, in which a copy of a useful data copy and/or a copy of a check data copy is compared (6) with original useful data and/or original check data before the secure telegram is provided (7).