Smart Card Time Encryption for Offline Care Service Management
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Solution Overview
Problem
Conventional methods for managing home-care services face challenges in accurately determining care service start and end times due to the need for continuous network connectivity between caregiver terminals and management servers, and are vulnerable to falsification of service times.
Innovation Solution
A system and method utilizing a smart card and terminal apparatus that encrypts time information, allowing for secure transmission and storage of care service times even when the terminal and server are not connected, with biometric authentication and hash value verification to prevent falsification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If GPS-based time determination is used to automatically record care service start and end times, then the burden of manual documentation on caregivers is reduced, but the system requires continuous network connectivity between terminal and server which is not always available
Solution Approach 1:
The system pre-loads care service schedules and patient information into the terminal device before network connectivity is lost. This allows the terminal to determine and record care service times using locally stored data and the device's own clock, without requiring real-time server connection. The preliminary loading of necessary data resolves the contradiction by enabling offline operation while maintaining accurate time recording.
Solution Approach 2:
The terminal device acts as an intermediary that stores care service information locally and uses its internal clock to determine service times when the server is inaccessible. This intermediary function allows the system to operate autonomously offline, resolving the contradiction between ease of operation and reliability by providing a local backup mechanism for time determination.
2Reliability
If manual time recording is used to allow operation without network connectivity, then the system works offline, but caregivers can deliberately falsify care service start and end times
Solution Approach 1:
The system automatically records care service start and end times based on GPS location data and compares this information with the pre-loaded care service schedule. This feedback mechanism verifies that the recorded times match the actual care service delivery, preventing falsification while maintaining offline operation capability. The automatic verification resolves the contradiction by eliminating manual time entry errors and intentional falsification.
Solution Approach 2:
The system replaces manual time recording with automated time determination using the device's internal clock and GPS-based location verification. This substitution eliminates the possibility of deliberate falsification while maintaining offline operation, resolving the contradiction between offline capability and time recording accuracy by using automated rather than manual processes.
3Device complexity
If documentation-based time management is used, then no special technology is required, but the burden of work on caregivers becomes excessive
Solution Approach 1:
The terminal device automatically performs time recording and verification functions using its internal clock, GPS capability, and pre-loaded care service information. This self-service approach eliminates the need for manual documentation while maintaining simple system architecture, resolving the contradiction between device complexity and productivity by automating routine tasks without requiring complex external systems.
Data Source
AI summary
A method manages a care service by a terminal apparatus of a caregiver. The method includes recognizing a smart card of a patient, receiving encrypted data including encrypted time information from the smart card, the encrypted time information being generated at the smart card by encrypting time information corresponding to a point in time when the terminal apparatus recognizes the smart card, and transmitting the encrypted data to a management server. The encrypted data is generated by the smart card using an encryption key and decrypted by the management server using a decryption key corresponding to the encryption key. A time corresponding to time information acquired from the decrypted data is stored in the management server as a care service providing time.