Secure NFC Configuration for Networked Transducer Provisioning
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Solution Overview
Problem
Existing IoT devices face challenges in securely configuring networked transducers due to mismatched public key infrastructure (PKI) keys and parameters, incomplete configuration, and the need for users to update cryptographic values post-manufacturing, which compromises security and efficient network access.
Innovation Solution
A configuration system utilizing a mobile handset to facilitate secure configuration steps, including NFC peer-to-peer communication, key exchange, and encrypted data transfer to update device credentials and firmware, ensuring compatibility with the user's environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the secure processing environment is isolated to enhance security, then security is improved, but user access to update cryptographic values and firmware is restricted
Solution Approach 1:
A configuration system acts as an intermediary between the user and the isolated secure processing environment. The system includes a configuration server that communicates with the transducer device through a configured interface, allowing users to update cryptographic values and firmware without directly accessing the secure environment. This mediator approach maintains security isolation while enabling necessary updates.
2Reliability
If PKI keys and parameters are pre-configured during manufacturing, then device security is improved, but compatibility with different user environments is reduced
Solution Approach 1:
The system enables dynamic updates of PKI keys and cryptographic parameters after manufacturing. The configuration system allows cryptographic values to be changed from initial values to different values based on user environment requirements. This dynamic adaptability maintains device security while enabling compatibility with various user environments.
3Adaptability or versatility
If users need to update cryptographic values post-manufacturing, then adaptability is improved, but security risks increase
Solution Approach 1:
The configuration system serves as a secure intermediary that manages cryptographic value updates. Rather than allowing direct user access to the secure processing environment, the system provides a controlled interface through the configuration server, which authenticates and authorizes update operations. This maintains security while enabling the necessary adaptability for post-manufacturing configuration changes.
4Adaptability or versatility
If network access credentials are uploaded securely, then network connectivity is improved, but configuration complexity increases
Solution Approach 1:
The configuration system enables self-service configuration where the transducer device automatically receives and processes network access credentials through the configured interface. The system handles the complexity of secure credential upload and integration automatically, reducing the burden on users while maintaining secure network connectivity capabilities.
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
Enables secure and efficient configuration of networked transducers, allowing users to update cryptographic values and network access credentials, enhancing device security and compatibility with minimal technical expertise.
Implementation Method 1
The NFC radio can communicate with a mobile handset using near field communication
Data Source
AI summary
A device can include an internal secure processing environment (SE) and communicate with a configuration system. The device may utilize a near field communications (NFC) radio. A mobile handset can connect with the SE in the device using NFC. The mobile handset can communicate with the configuration system and receive configuration data and a software package for the device. The SE can derive a PKI key pair and send the derived public key to the configuration system via the mobile handset. The SE and the configuration system can mutually derive an encryption key using the derived PKI key pair. The configuration data can be transmitted over the NFC radio, and the mobile handset can establish a Wi-Fi access point. The software package can be encrypted using the encryption key and transmitted to the device over the established Wi-Fi access point, thereby completing a configuration step for the device.