Portable Terminal Control System for Paired Operator Security
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Solution Overview
Problem
Existing portable communication terminal systems fail to ensure that terminal devices can only be used when both operators are together, as they allow use even when the devices are not in close proximity, compromising security in paired operations like cash transportation.
Innovation Solution
A portable communication terminal control system using two first portable communication terminals and a second portable communication terminal, where the first terminals determine the communication connection state and transmit release signals to shift the second terminal between limited and released states, ensuring application program execution only when both terminals are in close proximity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal device is unlocked only when short-range wireless communication connection is established with the portable terminal, then unauthorized use by third parties is prevented, but the terminal cannot be used when the operator approaches alone (breaking the pair requirement)
Solution Approach 1:
The system dynamically changes the unlock conditions based on the operational context. When performing paired work, both operators must be present. When not performing paired work, the terminal can be unlocked by a single operator. This dynamic adjustment of access control policies resolves the contradiction between security and flexibility.
Solution Approach 2:
The system changes the parameter of unlock condition requirements. In paired work mode, the requirement is that both first portable communication terminals must establish connection. In non-paired work mode, the requirement is reduced to only the second portable communication terminal needing connection. This parameter change allows the system to adapt to different operational scenarios.
2Adaptability or versatility
If the terminal device allows use when only one operator is present, then usage flexibility is improved, but security is compromised as unauthorized use becomes possible
Solution Approach 1:
The system dynamically adjusts access control based on whether the operator is performing paired work or not. This dynamic control allows the system to provide both flexibility and security according to the operational context, preventing unauthorized use while maintaining convenience when appropriate.
Solution Approach 2:
The system uses feedback from the communication connection state to determine unlock permissions. By continuously monitoring whether the first portable communication terminal is connected, the system can dynamically grant or deny access to the terminal device, ensuring security while maintaining flexibility based on real-time conditions.
3Reliability
If application programs are restricted to execute only when both operators are together, then security is enhanced, but workability is reduced when operators are separated
Solution Approach 1:
The system dynamically changes program execution restrictions based on communication connection status. When the first portable communication terminal is connected, the terminal device can execute application programs. When disconnected, program execution is restricted. This dynamic adjustment balances security requirements with operational needs.
Solution Approach 2:
The system changes the parameter of program execution permissions based on whether the operator is performing paired work. In paired work scenarios, programs can execute. In non-paired scenarios, execution is restricted. This parameter change allows the system to adapt security policies to actual work conditions.
Data Source
AI summary
A portable communication terminal control system includes a plurality of first portable communication terminals and a second portable communication terminal. A first processor in the first portable communication terminal performs a first portable communication terminal side determination process which determines whether communication connection is in an established state between a first portable communication terminal and the second portable communication terminal. The first processor performs a transmission control process in which, in response to determination that the communication connection with the other first portable communication terminal is in the established state and that the communication connection with the second portable communication terminal is in the established state, a release signal is transmitted to the second portable communication terminal. The second portable communication terminal includes a second processor which, in response to receiving the release signal, shifts the second portable communication terminal to the released state.