Autonomous Sensor Security via Trusted Authority Server
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Solution Overview
Problem
Existing IoT systems face challenges in securing data transmission between sensors and management systems, particularly due to vulnerabilities in link-layer encryption and distributed key stores, as well as manageability issues with heterogeneous and geographically distributed sensors.
Innovation Solution
An automated control system that enables secure communication between a sensor client and a heterogeneous set of unique sensors, using autonomous secure identification, password-secured connections, and source encryption with a well-defined public key, thereby addressing security and manageability concerns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If link-layer encryption is used to protect sensor data transmission, then data security is improved, but security vulnerabilities increase due to lack of protection at data relay nodes
Solution Approach 1:
The patent introduces a trusted authority server as an intermediary that issues digital certificates to sensors and management systems. This mediator enables secure authentication and encryption at multiple layers (link-layer, network-layer, and application-layer), addressing the vulnerability of link-layer encryption alone by adding cryptographic protection through the trusted authority that prevents unauthorized access and data manipulation at relay nodes
2Reliability
If public key infrastructure is implemented in every sensor device, then encryption capability is improved, but device complexity and security exposure increase
Solution Approach 1:
The patent extracts the complex key management functionality from individual sensor devices and relocates it to a centralized trusted authority server. Sensors only store simple digital certificates issued by the authority, while the server handles key generation, distribution, and management. This extraction reduces sensor complexity while maintaining strong encryption capabilities through the centralized authority that manages all cryptographic operations
3Reliability
If distributed key stores are implemented across all devices, then secure communication is improved, but manageability deteriorates due to recurring setup burden
Solution Approach 1:
The patent implements self-service through automated certificate issuance and distribution managed by the trusted authority server. When sensors are deployed, they automatically obtain digital certificates from the server without manual configuration. The system autonomously manages key pairs, certificates, and security credentials, eliminating the need for users to manually set up security on each device while maintaining secure communication through automated enrollment and credential management
Data Source
AI summary
A networked computer system providing an automated control system that enables a sensor client to securely communicate with a heterogeneous set of unique sensors. The system enables autonomous secure identification of specific sensors capable of system inter-operation. Recognized sensors are autonomously paired and the connection secured using a password unique to the sensor and autonomously managed by the system. Measurement data is source encrypted using a well-defined public key, thereby providing data security that extends uninterrupted from the sensor itself to an appropriately authorized subsystem of the control system.