Smart Door Lock Access Control With Cloud-Managed Random Keys
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Solution Overview
Problem
Conventional smart door lock systems face complexity in access control management and security risks due to the use of shared keys and cards, increasing operational difficulty and management costs.
Innovation Solution
A smart door lock system and method that generates unique random keys for access cards, stores card data sets in the cloud, and uses client terminals to remotely manage access control by matching card identifiers with door lock identifiers, enabling secure and convenient addition or deletion of access cards without direct interaction with the locks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional access control methods are used with shared keys and cards, then the system is simpler to implement, but security risk increases and management complexity increases
Solution Approach 1:
The patent divides the access control system into multiple independent components: access cards with unique identifiers, door locks with individual key sets, and a management server. Each door lock has its own dedicated key set rather than sharing a common key, which segments the security architecture and reduces the impact of key compromise. This segmentation allows independent management of each access point while maintaining overall system security.
Solution Approach 2:
The patent introduces a management server as an intermediary between access cards and door locks. The server handles key generation, card registration, and access authorization, eliminating the need for direct interaction between users and lock devices for management operations. This intermediary centralizes control, simplifies user operations, and enhances security by managing all cryptographic operations remotely.
2Ease of operation
If operation on the door lock is required to add or delete access cards, then the system maintains direct control, but working difficulty and management costs increase
Solution Approach 1:
The patent implements a self-service mechanism where the management server automatically handles card addition and deletion operations. When a user presents an access card, the system automatically registers the card by generating and distributing unique key sets to relevant door locks without requiring manual intervention at each lock device. This automation significantly reduces the time and effort required for access card management.
Solution Approach 2:
The system performs preliminary actions by pre-generating unique key sets for each door lock and storing them securely in the management server before any access card operations. This preparation allows rapid card provisioning and revocation, as the infrastructure is already in place to immediately distribute or revoke keys without requiring on-site technical operations.
3Device complexity
If the same key is used for multiple locks and access cards, then the system is easier to manage, but security risk increases
Solution Approach 1:
The patent applies local quality by giving each door lock a unique, locally-specific key set that is different from all other locks. Instead of using a uniform key across the system, each access point has customized cryptographic credentials tailored to its specific location and security requirements. This differentiation ensures that compromising one lock's key does not affect the security of other locks, while the management server maintains centralized control over all key distributions.
Data Source
AI summary
One example embodiment is a method for managing access control of a smart door lock system, including the steps of: generating a random key as a second card identifier for an access card having a first card identifier, wherein the first and second card identifiers form a card data set; pushing the card data set to a cloud server and storing the card data set in a database; assigning the access card to a smart door lock having a door lock identifier; pushing the first card identifier and the door lock identifier to the cloud server; pushing the card data set to the smart door lock; and storing the card data set as an assigned password set, such that the access card has authorization to control the locking/unlocking of the smart door lock. Other example embodiments are described herein. In certain embodiments, the system is simple and convenient to operate.