Hardware-Based API Key Protection Using Trusted Platform Module
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Solution Overview
Problem
Existing technologies lack effective hardware-based protection mechanisms for Application Programming Interface (API) keys, making them vulnerable to theft and unauthorized use.
Innovation Solution
The implementation of a hardware-based protection system for API keys using a Trusted Platform Module (TPM), where API keys are encrypted and decrypted by the TPM, and usage logs are recorded in the TPM's Platform Configuration Register (PCR) for secure attestation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If API keys are stored in software-based systems, then ease of operation is improved, but security is worsened due to vulnerability to theft and unauthorized use
Solution Approach 1:
The patent introduces a Trusted Platform Module (TPM) as an intermediary hardware component between the software system and the API keys. The TPM securely stores the API keys and performs cryptographic operations, acting as a mediator that protects the keys from software-based attacks while maintaining controlled access. This resolves the contradiction by adding a hardware layer that enhances security without completely sacrificing operational ease through proper key management interfaces.
Solution Approach 2:
The patent replaces software-based key storage and protection mechanisms with hardware-based mechanisms in the TPM. By substituting the software-only approach with a hardware root of trust, the system achieves stronger security guarantees while maintaining usability through standardized hardware interfaces for key access and management.
2Reliability
If API keys are encrypted and decrypted by TPM, then security is improved, but device complexity is worsened
Solution Approach 1:
The TPM performs self-service by automatically handling the encryption and decryption of API keys within its secure boundary. The module manages its own cryptographic operations, key storage, and security policies without requiring external software to implement complex protection logic. This reduces the overall system complexity despite adding hardware, as the TPM encapsulates the security complexity within its standardized interfaces.
3Reliability
If usage logs are recorded in TPM PCR, then security attestation is improved, but manufacturing complexity is worsened
Solution Approach 1:
The TPM performs preliminary actions by pre-configuring Platform Configuration Registers (PCRs) during manufacturing to store measurements of system integrity states. These PCRs are initialized with trusted values and can be extended to record API key usage events. This preliminary setup enables automatic security attestation without requiring complex post-manufacturing configuration, as the hardware is pre-prepared to log and verify usage events.
Data Source
AI summary
Systems and methods for hardware-based protection of Application Programming Interface (API) keys are described. In some embodiments, an endpoint Information Handling System (IHS) may include a processor and a memory coupled to the processor, the memory having program instructions stored thereon that, upon execution by the processor, cause the IHS to: send an encrypted API key to a trusted controller; and receive a decrypted API key from the trusted controller.