Local Temporary Password Pool for Smart Door Locks
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Solution Overview
Problem
Smart door locks face challenges with networked locks due to security concerns from network hacking and disconnections, and non-networked locks require visitors to wait outside when the owner is not home, compromising safety.
Innovation Solution
A method and device for temporary password management that generates and cycles temporary passwords locally, ensuring security by avoiding network dependencies and enhancing convenience by allowing visitors to enter without waiting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If networked door locks are used to allow real-time password changes and remote access, then convenience is improved, but security deteriorates due to network hacking vulnerabilities and disconnections
Solution Approach 1:
The patent extracts the password verification function from the networked system and implements it locally in the door lock device. The lock maintains a local valid temporary password pool and performs all verification operations locally without network dependency, eliminating network security vulnerabilities while preserving remote access capability through pre-generated temporary passwords
Solution Approach 2:
The patent creates a local copy of the password verification system within the door lock device. Instead of relying on networked authentication, the lock maintains local copies of temporary passwords and verification logic, enabling independent operation that is immune to network attacks while still providing remote access functionality
2Reliability
If non-networked door locks are used to improve security by eliminating network vulnerabilities, then security is improved, but convenience deteriorates as visitors must wait outside when the owner is not home
Solution Approach 1:
The patent implements preliminary action by generating and storing multiple temporary passwords in advance within the door lock's local memory. These pre-generated passwords can be distributed to visitors before the owner arrives home, allowing visitors to enter without waiting while the lock remains offline and secure. The system performs the password distribution action beforehand, eliminating the need for real-time network communication
3Ease of operation
If temporary passwords are stored indefinitely in the valid pool to ensure continuous access, then convenience is improved, but security deteriorates due to accumulation of expired credentials
Solution Approach 1:
The patent implements periodic action through automatic expiration checking and removal of temporary passwords from the valid pool. The system periodically reviews the validity period of stored temporary passwords and automatically removes expired ones, maintaining security by eliminating stale credentials while ensuring continuous availability of valid passwords for visitor access
Data Source
AI summary
A method for temporary password management, including: obtaining a first temporary password entered by a user; matching the first temporary password with temporary passwords in a valid temporary password pool; if the matching succeeds, performing an unlocking operation; moving a second temporary password from the valid temporary password pool to an invalid temporary password pool, the second temporary password being a temporary password matching the first temporary password in the valid temporary password pool; when a temporary password having a storage time exceeding a first time length threshold exists in the invalid temporary password pool, moving the temporary password in the invalid temporary password pool having a storage time exceeding the first time length threshold back to the valid temporary password pool.