Device-Bound Certificate Authentication via Digital Fingerprints
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Solution Overview
Problem
Digital certificates can be easily copied and misused, posing a significant security risk as they are not bound to specific devices, allowing unauthorized access and malicious activities.
Innovation Solution
Implementing device-bound certificates that include digital fingerprints of authorized devices, ensuring that a certificate can only be used by the devices it is explicitly bound to, limiting its use and mitigating security compromises.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional digital certificates are used without device binding, then certificate distribution and authentication are simple, but security is compromised as certificates can be copied and misused by unauthorized devices
Solution Approach 1:
The patent segments the certificate's applicability by binding it to specific device identifiers (digital fingerprints). Instead of a universal certificate that can be used by any device, the certificate is divided into device-specific instances through the inclusion of device identifiers in the certificate data structure. This segmentation ensures that each certificate is only valid for its bound device, preventing unauthorized use while maintaining the overall certificate authentication framework.
Solution Approach 2:
The patent introduces device identifiers (digital fingerprints) as intermediaries between the certificate and the device. These identifiers act as mediators that link the cryptographic certificate to specific physical devices. The certificate authority signs not just the entity's identity but also the device's digital fingerprint, creating a trusted chain that verifies both the entity and the specific device. This intermediary mechanism enables secure device binding without requiring complex hardware modifications.
2Object-affected harmful factors
If certificates are bound to specific devices using digital fingerprints, then unauthorized device access is prevented, but certificate verification becomes more complex
Solution Approach 1:
The patent performs preliminary binding of device identifiers to certificates during the certificate issuance process. Instead of verifying device identity at the time of use, the device's digital fingerprint is embedded in the certificate when it is created by the certificate authority. This preliminary action ensures that the binding is established once during a controlled process, and subsequent verifications only need to check the embedded identifier against the current device's identifier, simplifying the ongoing verification process.
Solution Approach 2:
The patent merges the entity's cryptographic identity with the device's digital fingerprint into a single unified certificate structure. Rather than maintaining separate entity credentials and device identifiers, the invention combines them into one certificate that serves both purposes. The certificate contains both the entity's public key and the bound device identifier, allowing a single verification process to authenticate both the entity and the specific device simultaneously.
Data Source
AI summary
A device-bound certificate authority binds a certificate to one or more devices by including digital fingerprints of the devices in the certificate. A device only uses a device-bound certificate if the digital fingerprint of the device is included in the certificate and is verified. Thus, a certificate is only usable by one or more devices to which the certificate is explicitly bound. Such device-bound certificates can be used for various purposes served by certificates generally such as device driver authentication and authorization of access to secure content, for example.