Decentralized Component Registration for Tamper-Proof Certificate Trust
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Solution Overview
Problem
Existing methods for securing communication between components in critical infrastructure systems are complex to implement and lack effective identity verification, making them vulnerable to cyberattacks and unauthorized access.
Innovation Solution
A method involving a registering component that establishes a tamper-proof channel, authenticates and authentificates other components using device-specific secrets, and issues signed certificates to ensure secure communication, utilizing tamper-proof channels and standard protocols like TLS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If components sign their own certificates, then implementation is easy, but secure verification of device identity is not possible
Solution Approach 1:
A trusted registration authority acts as an intermediary between components and communication partners. The registration authority signs certificates on behalf of components, providing secure identity verification while maintaining ease of implementation. Components simply register with the authority, which then issues signed certificates that enable mutual authentication without requiring complex self-signing mechanisms.
2Reliability
If certificates are distributed during production, then security is improved, but system complexity and lack of standards increase
Solution Approach 1:
Components are pre-configured with unique identifiers and public keys during manufacturing, but certificates are not fully distributed until registration with the trusted authority. This preliminary action ensures security through pre-configured cryptographic materials while avoiding the complexity of complete certificate distribution during production. The registration process then completes the security setup in a standardized manner.
3Ease of manufacture
If direct data connection to components is used for certificate distribution, then certificate installation is possible, but vulnerability to cyberattacks increases
Solution Approach 1:
The trusted registration authority serves as a secure intermediary for certificate distribution, eliminating the need for direct data connections between components and external systems during certificate installation. Certificates are distributed through the trusted authority using secure channels, reducing vulnerability to cyberattacks while maintaining certificate installation capability.
4Adaptability or versatility
If components from multiple manufacturers are used, then system versatility is improved, but certificate distribution becomes more difficult
Solution Approach 1:
The trusted registration authority provides a universal certificate issuance mechanism that works with components from any manufacturer. The authority maintains a database of valid component identifiers and public keys, allowing it to sign certificates for components from multiple manufacturers using a standardized process. This universal approach enables multi-manufacturer compatibility while simplifying certificate distribution through a single trusted intermediary.
Data Source
AI summary
A method for constructing a decentralized data communication structure within a system having a plurality of components, wherein each component contains a private key, an associated public key, a secret secured against read-out, and certificate information that is unsigned in the initial state and contains the public key, includes establishing a registering component of the plurality of components, wherein the establishment includes storing a list of validation entries, constructing a tamper-proof channel between the registering component and a first component of the other components, and authenticating the first component at the registering component and authentificating the first component using the list of validation entries via the tamper-proof channel. The authentication comprises signing the unsigned certificate information of the first component by the registering component via the tamper-proof channel. A system such as an energy generation plant having a plurality of components is configured to carry out the method.