Verification Device Current Threshold Authentication

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Solution Overview

Problem

Existing authentication methods for verification target devices, such as IC chips and tags, face challenges in verifying authenticity, especially when confidential information is leaked, and struggle to differentiate between authentic and counterfeit devices using software-based cryptographic processing, which consumes more operation power than hardware-based processing.

Innovation Solution

A verification device is configured to supply operation power to the verification target device, detect the current flow, and determine authenticity based on a threshold value, distinguishing between authentic and counterfeit devices by monitoring current consumption during non-data transmission periods.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If software-based cryptographic processing is used for authentication, then ease of manufacture is improved, but operation power consumption increases

Engineering Contradiction:

Improveease of manufactureVSAvoidoperation power

Core Design Contradiction:

Ease of manufactureVSUse of energy by moving object

Solution Approach 1:

The patent replaces software-based cryptographic processing with hardware-based cryptographic processing. This substitution changes the implementation medium from software (easier to manufacture but higher power consumption) to hardware (more complex to manufacture but lower power consumption), thereby resolving the contradiction between ease of manufacture and operation power consumption.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Reliability

If confidential information is leaked, then security is compromised, but authentication verification becomes necessary to detect counterfeit devices

Engineering Contradiction:

Improveauthentication verificationVSAvoidconfidential information leakage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent implements a feedback mechanism by monitoring operation power consumption during authentication and using this information to verify device authenticity. The verification device detects current flow, compares it against expected thresholds, and determines whether the device is authentic or counterfeit based on this feedback, enabling detection even when confidential information has been leaked.

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The patent converts the harmful effect of confidential information leakage into a beneficial authentication mechanism. By monitoring operation power consumption patterns, the system can identify counterfeit devices that may have obtained confidential information, turning the security vulnerability into a detection capability that enhances overall system reliability.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Productivity

If current detection is performed during data transmission, then communication efficiency is maintained, but measurement precision of power consumption decreases

Engineering Contradiction:

Improvecommunication efficiencyVSAvoidpower consumption measurement

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent employs periodic action by performing current detection at specific intervals during the authentication process rather than continuously during data transmission. The verification device detects current flow at predetermined timing points, allowing both communication efficiency to be maintained and measurement precision to be improved by selecting optimal measurement moments when power consumption patterns are most distinctive.

Inventive Principle:

Principle #19Periodic action

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This method effectively verifies the authenticity of IC chips and tags by detecting abnormal power consumption, even if cryptographic processing information is leaked, thereby identifying counterfeit products that use software-based processing, which typically consumes more power than hardware-based processing.

Implementation Method 1

a detection unit configured to detect a value of a current that flows in the verification device due to the operation power being supplied to the verification target device

Methodology Applied

Scientific EffectElectrical current detection: Electrical Resistance

Data Source

PatentUS11507159B2Verification device and verification target device that operates using operation power supplied from the verification device

Publication Date: 2022.11.22 CANON KK

AI summary

A verification device is configured to supply operation power to a verification target device in order to communicate with the verification target device, and perform verification of the verification target device. The verification device includes: a detection unit configured to detect a value of a current that flows in the verification device due to the operation power being supplied to the verification target device; a determination unit configured to determine whether or not the value of the current is greater than a threshold value; and a verification unit configured to verify authenticity of the verification target device according to whether or not the value of the current is greater than the threshold value.