PUF-Based Key Generation for Secure IoT Data Transmission
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Solution Overview
Problem
Current systems lack a well-defined mechanism for secure data transmission and access control in peer-to-peer communication, particularly in IoT devices and computing systems, where sensitive information needs to be protected from unauthorized access based on role-sensitive data access requirements.
Innovation Solution
The implementation of Physically Unclonable Function (PUF)-based keys for secure communication, using PUF modules to generate unique secret and public keys, and employing cryptographic protocols like Diffie-Hellman key exchange and RSA for secure key exchange and data encryption, ensuring end-to-end authentication and protecting data transmission over physical tunnels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional authentication mechanisms are used in peer-to-peer communication, then device compatibility and ease of operation are maintained, but security against unauthorized access and data breaches is insufficient
Solution Approach 1:
The PUF module automatically generates unique cryptographic keys based on inherent physical variations in the hardware circuitry. The system self-authenticates peers through challenge-response protocols without requiring manual key distribution or complex key management infrastructure, making security self-generating and self-managing.
Solution Approach 2:
The PUF acts as an intermediary that translates physical hardware characteristics into cryptographic security. Instead of directly implementing complex authentication protocols, the system uses the PUF as a mediator that converts physical variations into unclonable digital identities, simplifying the overall security architecture.
2Reliability
If role-based access control is implemented for sensitive data, then data protection and authorization management are improved, but the complexity of key management and access control mechanisms increases
Solution Approach 1:
The system segments access control by creating role-specific key pairs where each peer has unique public-private key combinations tailored to their authorization level. Sensitive data is encrypted with recipient-specific public keys, automatically segmenting access control without requiring centralized key management or complex permission systems.
Solution Approach 2:
The system changes the parameter of key generation from manual or centralized provisioning to automated generation based on physical hardware characteristics. Each peer's PUF characteristics become the seed for their cryptographic parameters, dynamically adapting security to the specific hardware instance and eliminating complex key distribution parameters.
3Reliability
If PUF-based cryptographic keys are used for secure communication, then security and authentication are significantly improved, but the ease of operation and implementation complexity increase
Solution Approach 1:
The PUF module automatically generates unique cryptographic keys based on inherent physical variations in the hardware circuitry. The system self-authenticates peers through challenge-response protocols without requiring manual key distribution or complex key management infrastructure, making security self-generating and self-managing.
Data Source
AI summary
A method includes encrypting a first message that contains a first public key of a first peer, by using a second public key of a second peer; and decrypting a second message sent from the second peer by using a first private key paired with the first public key. The second message may be encrypted at the second peer by using the first public key, and may contain an encrypted data encrypted by the second peer using the second public key and hashed by using a secret key of the first peer. The first public key, the second public key, the first private key and the secret key may be physically unclonable function (PUF)-based keys.