NFC Smart Lock Unlocking With Fingerprint Authentication

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Solution Overview

Problem

Existing NFC-based intelligent lock systems for mobile terminals lack sufficient security, allowing unauthorized access due to the ease of unlocking with a mobile device, compromising security.

Innovation Solution

A fingerprint recognition and NFC-based unlocking method that requires an initial password setup and records user fingerprints for secure authentication, combining NFC communication with fingerprint verification to enhance security.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If NFC technology is used for unlocking, then convenience is improved, but security deteriorates

Engineering Contradiction:

Improveunlocking convenienceVSAvoidsecurity

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent combines NFC technology with fingerprint recognition technology into a unified unlocking system. The mobile terminal uses NFC to communicate with the intelligent lock while simultaneously capturing and verifying fingerprint data, merging two authentication mechanisms into one integrated solution that maintains both convenience and security.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The unlocking system employs a composite authentication approach by integrating multiple verification methods (NFC communication + fingerprint recognition) rather than relying on a single method. This composite security model ensures that both the mobile terminal authentication and biometric verification must succeed for unlocking to occur.

Inventive Principle:

Principle #40Composite materials

2Ease of operation

If only NFC authentication is used, then ease of operation is improved, but security is insufficient

Engineering Contradiction:

Improveauthentication simplicityVSAvoidunauthorized access

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The system performs preliminary fingerprint data capture and storage before the actual unlocking operation. During setup, the user's fingerprint is captured and stored in the intelligent lock's database, enabling rapid verification during subsequent unlocking attempts without requiring real-time fingerprint capture during the critical authentication moment.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The mobile terminal acts as an intermediary between the user and the intelligent lock. It captures fingerprint data, communicates with the lock via NFC, and transmits authentication results, serving as a mediating device that enhances security while maintaining user convenience.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentEP3509040B1Mobile terminal unlocking method based on fingerprint recognition and NFC

Publication Date: 2026.03.04 JRD COMMUNICATION INC

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AI summary

A mobile terminal unlocking method and system based on fingerprint recognition and NFC. The method comprises: when the mobile terminal approaches an intelligent lock, the mobile terminal establishing a data communication connection with the intelligent lock via NFC (S 100); the intelligent lock sending a fingerprint verification instruction to the mobile terminal via NFC, and a fingerprint verification interface popping up on a screen of the mobile terminal after receiving the instruction (S200); and after receiving the fingerprint input by a user, the mobile terminal sending the fingerprint to the intelligent lock, and the intelligent lock comparing fingerprint information to fingerprint data in a database, and performing unlocking when recognition succeeds (S300). The method is convenient for the user, and the safety is improved.