Communication Apparatus Fail-Safe Authentication Control

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Solution Overview

Problem

Existing communication systems face reliability issues in authentication due to disguised communication apparatuses that can acquire the regularity of challenge codes by repeatedly transmitting request signals, leading to potential illegitimate authentication processes.

Innovation Solution

A communication apparatus and system that transmit a challenge code based on a received request signal and perform authentication using a response code, with a control unit that counts the number of request signals received and initiates a fail-safe process when a set number is exceeded, including prohibiting challenge code transmission to prevent illegitimate authentication.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a communication apparatus transmits challenge codes in response to request signals, then authentication can be performed, but disguised apparatuses can acquire challenge code regularity by repeatedly transmitting requests

Engineering Contradiction:

Improveauthentication reliabilityVSAvoidchallenge code acquisition by disguised apparatus

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary anti-action by implementing a countermeasure before the authentication system is compromised. The control unit monitors the number of times a challenge code is transmitted to the same apparatus and proactively prevents further transmissions when a threshold is reached, thereby stopping disguised apparatuses from acquiring challenge code regularity before they can perform illegitimate authentication

Inventive Principle:

Principle #9Preliminary anti-action

Solution Approach 2:

The patent implements feedback by having the control unit count and track the number of challenge code transmissions to each apparatus. This feedback mechanism allows the system to detect abnormal patterns (repeated requests from the same apparatus) and automatically adjust its behavior by prohibiting further challenge code transmissions when the count exceeds the threshold

Inventive Principle:

Principle #23Feedback

2Adaptability or versatility

If challenge codes are transmitted repeatedly to the same apparatus, then authentication attempts can be made, but authentication reliability is degraded due to disguised apparatus exploitation

Engineering Contradiction:

Improveauthentication attempt capabilityVSAvoidauthentication reliability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies dynamics by making the challenge code transmission behavior adaptive rather than static. The control unit dynamically adjusts its response based on the counted number of transmissions: it continues to transmit challenge codes normally when the count is below the threshold, but automatically prohibits further transmissions when the threshold is exceeded, thereby dynamically preventing authentication exploitation

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS10594675B2Communication apparatus, communication system, communication method, and program

Publication Date: 2020.03.17 HONDA MOTOR CO LTD

AI summary

A communication apparatus that transmits a challenge code on the basis of a received request signal and performs authentication of an authentication target apparatus transmitting the request signal on the basis of the challenge code and a response code generated on the basis of the challenge code includes a control unit configured to perform a predetermined fail-safe process when a request signal is received a set number of times or more from the authentication target apparatus before completion of the authentication after the transmission of the challenge code.