IoT Smart Lock Password Sharing for Remote Multi-Lock Access

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Solution Overview

Problem

Conventional door locks require physical proximity cards or manual password entry, which are prone to loss or forgetfulness, and managing multiple locks is laborious for landlords or hotel managers.

Innovation Solution

An IoT device password sharing system comprising a cloud server, first and second smart devices, and smart locks, enabling remote password management and sharing through an application software, with authentication, configuration, and storage modules for efficient lock control.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Speed

If proximity cards are used for door locks, then security and speed of access are improved, but the risk of loss and inconvenience of carrying physical cards increases

Engineering Contradiction:
Improveaccess speedVSAvoidrisk of loss
Core Design Contradiction:
SpeedVSObject-affected harmful factors

Solution Approach 1:

The patent replaces physical proximity cards with digital copies stored in mobile devices. The password sharing system generates virtual password copies that can be transmitted electronically, eliminating the need for physical card carriers while maintaining quick access functionality.

Inventive Principle:
Principle #26Copying

Solution Approach 2:

The patent substitutes the mechanical proximity card system with an electronic password sharing system. Instead of using physical cards and card readers, the system uses mobile devices with communication capabilities to transmit and validate passwords, replacing the entire mechanical card-based authentication mechanism.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Ease of operation

If passwords are used for door locks, then the inconvenience of carrying physical cards is eliminated, but the time required for authentication and the problem of forgetting passwords increases

Engineering Contradiction:
Improveconvenience of useVSAvoidauthentication time
Core Design Contradiction:
Ease of operationVSLoss of time

Solution Approach 1:

The patent implements preliminary action by pre-generating and storing multiple password copies in the cloud server before they are needed. When a user needs access, they can immediately retrieve a pre-prepared password without waiting for generation or complex authentication processes, significantly reducing authentication time.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The system enables self-service by allowing users to automatically retrieve and use password copies from the cloud server without requiring manual intervention from administrators. The mobile device automatically communicates with the server to obtain authentication credentials, eliminating the need for users to remember passwords or request new ones manually.

Inventive Principle:
Principle #25Self-service

3Reliability

If multiple door locks are managed manually, then security control is maintained, but the labor and time required for management and allocation of credentials increases

Engineering Contradiction:
Improvesecurity controlVSAvoidmanagement efficiency
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The patent implements universality by creating a single cloud server system that can manage multiple door locks and multiple users simultaneously. The server provides universal password generation and distribution capabilities that work across different locks and users, eliminating the need for separate management systems for each lock and reducing administrative workload.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The cloud server acts as an intermediary between administrators and multiple door locks/users. Instead of manually managing each lock individually, the server mediates the entire authentication credential distribution process, automatically generating, storing, and distributing passwords to authorized users, thereby significantly improving management efficiency while maintaining security.

Inventive Principle:
Principle #24Intermediary (Mediator)

Data Source

PatentEP4651108A1IoT device password sharing system
Publication Date: 2025.11.19 MH HOLDINGS USA CORP
  • EP4651108A1 patent drawingFigure 1
  • EP4651108A1 patent drawingFigure 2
  • EP4651108A1 patent drawingFigure 3

AI summary

An IoT device password sharing system comprises a cloud server, at least one first smart device, at least one second smart device and at least one smart lock, and is connected to the cloud server through an application software of the first smart device, thereby setting a password message for the smart lock remotely, and transmitting the password message to the second smart device through the cloud server, and the second smart device is capable of opening the password message through an application software thereof and sharing the received password message, thereby achieving an object of opening the smart lock.