Secure Module Near Field Connection Control
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Solution Overview
Problem
In near field communication systems, determining which functionality to expose to external parties is challenging, leading to confusion and compliance issues, particularly when transitioning between MCU and secure module interactions.
Innovation Solution
A method that detects a radio frequency field and passes control of establishing a near field connection to the secure module, allowing the control unit to listen to data exchange and intercept connection attempts, ensuring seamless communication by continuing the connection under control of the control unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If near field communications always start using the MCU software, then the mobile phone can control the handshake process and appear as an active device, but external RFID readers may get confused and display error messages because they expect to see a standard secure module
Solution Approach 1:
The system performs preliminary detection of the radio frequency field before initiating communication, allowing the secure module to activate first and present its standard interface to external readers. This preliminary action prevents reader confusion while maintaining MCU control capability for subsequent handshake processes.
Solution Approach 2:
The control unit acts as an intermediary that listens to data exchange between the secure module and external device, identifying connection attempts and determining whether to intercept or allow secure module communication. This intermediary role resolves the conflict between reader expectations and MCU control needs.
2Reliability
If near field communications always start with the secure module, then external devices see a standard passive card interface, but the MCU software cannot control the handshake process and cannot make the mobile phone appear as nothing else than a passive card
Solution Approach 1:
The control unit listens to the data exchange between the secure module and external device, providing feedback about the connection attempt. Based on this feedback, the system determines whether to intercept the connection for MCU handling or allow it to proceed with the secure module, thus maintaining both reader compatibility and MCU control capability.
3Reliability
If communication is handed over to the secure module after initiation by MCU, then the secure module can handle the connection, but the handshake phase must be redone which takes substantial time and may fail compliance tests
Solution Approach 1:
The secure module activates and begins the handshake process preliminarily before MCU intervention is needed. This allows the initial handshake to occur with the secure module, avoiding the need to redo it when control is handed over, thus reducing time loss and improving compliance test passage.
4Adaptability or versatility
If the MCU initiates communication with an external RFID reader, then the mobile phone can act as an active device, but the external reader sees a device that does not look like a standard secure module it expects to see
Solution Approach 1:
The system performs preliminary detection and secure module activation before MCU communication initiation. This ensures the secure module is ready and can present its standard interface to external readers, making device identification easier while maintaining active communication capability.
Solution Approach 2:
The control unit serves as an intermediary that monitors the communication setup process, allowing the secure module to establish its standard presence for external readers while enabling MCU control for active communication functions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach prevents confusion and compliance issues by ensuring smooth communication establishment, allowing the secure module to handle connections intended for it while enabling the MCU to handle others, thus enhancing the reliability of near field communication processes.
Implementation Method 1
Near field communication (NFC) is a communication technology that operates in short distances (for example in distances below tens of centimeters). Information may be transferred for example over RFID (radio-frequency identification) protocols.
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
Disclosed is an apparatus capable of hosting a secure module. The apparatus comprises a communication unit capable of near field communications, and a control unit configured to co-operate with the secure module. The control unit is further configured to detect a radio frequency field and, in response to the detection of the radio frequency field, to pass, to the secure module, control of establishing a near field connection through the communication unit. Also disclosed is a secure module, comprising a control unit configured to assume control of establishing a near field connection, wherein the control unit is further configured to provide, in the course of the near field connection establishment, a set of capabilities comprising near field communication capabilities of the secure module and near field communication capabilities of an apparatus hosting the secure module.