Secure Modular Hardware Binding via Encrypted Key Authentication
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Solution Overview
Problem
The increasing complexity and configurability of Information Handling Systems (IHSs) in datacenter, edge, and enterprise infrastructure pose security challenges, as bad actors can configure illicit subsystems, leading to potential security breaches. Additionally, secured Complex Programmable Logic Devices (CPLDs) often incur additional costs and impact supply chain agility.
Innovation Solution
The implementation of a secure modular hardware binding system that uses an encrypted secret key shared between a platform Root-of-Trust (ROT), a Datacenter-Secure Control Module (DC-SCM), and a Host Processor Module (HPM) associated with the DC-SCM. This system authenticates firmware stacks installed on CPLDs by comparing the encrypted secret key presented by the CPLD with the stored version, ensuring secure operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If secured CPLDs are used to prevent unauthorized configurations, then security is improved, but cost and supply chain complexity increase
Solution Approach 1:
The patent introduces a Datacenter-Secure Control Module (DC-SCM) as an intermediary between the Host Processor Module (HPM) and the CPLD. The DC-SCM manages security operations including storing encrypted secret keys, authenticating firmware stacks, and controlling CPLD operation. This intermediary approach allows standard CPLDs to achieve secured functionality through software-based authentication rather than requiring expensive hardware-secured CPLDs, thereby improving security while reducing supply chain complexity and cost.
2Reliability
If firmware authentication is implemented to prevent illicit subsystems, then security is improved, but system complexity increases
Solution Approach 1:
The DC-SCM is designed as a multi-functional module that handles multiple security-related tasks: storing encrypted secret keys for multiple CPLDs, authenticating firmware stacks on CPLDs, managing HPM firmware authentication, and controlling CPLD operation based on authentication results. By consolidating these diverse security functions into a single universal module, the system achieves comprehensive security without proportionally increasing overall system complexity.
3Reliability
If encrypted secret key storage is implemented in both platform ROT and CPLD, then authentication reliability is improved, but manufacturing complexity increases
Solution Approach 1:
The encrypted secret key is pre-loaded into the DC-SCM during manufacturing before the system is deployed. This preliminary action ensures that the authentication mechanism is already in place and configured, allowing for reliable authentication operations without adding complex configuration steps during system deployment or operation. The pre-loading of cryptographic materials simplifies the manufacturing process compared to requiring post-manufacturing configuration of security parameters.
Data Source
AI summary
Systems and methods for secure modular hardware binding in a Data Center Modular Hardware System (DC-SCM) environment are described herein. According to one embodiment, an Information Handling System (IHS) includes multiple Complex Programmable Logic Devices (CPLDs), and computer-executable logic to, for each of the CPLDs: store an encrypted secret key in a platform Root-of-Trust (ROT) and the CPLD, and receive, by the platform ROT, a request to authenticate a firmware stack installed on the CPLD. The logic may then present, by the CPLD, an encrypted secret key to the platform ROT, authenticate, by the platform ROT, the firmware stack by comparing the encrypted secret key received from the CPLD with its stored version of the encrypted secret key, and allow operation of the CPLD based on the authentication.