Group HSM Provisioning Control for Production Continuity
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Solution Overview
Problem
Existing secure hardware security modules (HSMs) used for provisioning security-sensitive data in electronic components fail due to physical damage, leading to loss of OEM keys and halting production until a new HSM is installed, causing significant delays and costs.
Innovation Solution
A provisioning control apparatus, such as a secure HSM, generates a group context with a group private key and certificate, allowing multiple HSMs to share and continue provisioning even if one fails, using a communication interface to distribute security-sensitive data and enroll new HSMs into the group.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single secure HSM is used for provisioning security-sensitive data, then security is maintained through centralized control, but production halts completely when the HSM fails
Solution Approach 1:
The system segments the provisioning function across multiple independent HSM instances (first HSM, second HSM, third HSM) instead of relying on a single centralized HSM. Each HSM can independently perform provisioning operations, allowing the system to maintain functionality even when individual HSMs fail. This segmentation directly resolves the contradiction by distributing reliability across multiple components while maintaining overall system productivity.
Solution Approach 2:
The system changes the operational parameter from single-HSM exclusive control to multi-HSM collaborative control with dynamic role assignment. HSMs can transition between active, standby, and revoked states, allowing flexible parameter adjustment based on operational needs and failure conditions, thereby maintaining both security and continuity.
2Ease of repair
If backups of OEM keys are stored outside the secure HSM, then recovery is possible after HSM failure, but security is compromised due to the secure nature of the HSM
Solution Approach 1:
The system introduces a key management server as an intermediary that handles key wrapping and distribution. The HSM never stores unwrapped backup keys externally; instead, the key management server securely manages wrapped key versions. This intermediary enables recovery functionality while preserving the security integrity of the HSM, as the HSM's secure boundaries are never violated.
Solution Approach 2:
The system performs preliminary key wrapping and version management before any potential HSM failure occurs. Multiple versions of wrapped keys are pre-prepared and stored securely in the key management server, enabling immediate recovery actions without compromising security. This preliminary preparation resolves the contradiction by enabling easy repair through pre-configured recovery mechanisms that maintain security integrity.
3Reliability
If multiple HSMs are deployed for redundancy, then provisioning continuity is maintained, but system complexity increases
Solution Approach 1:
The system implements universal HSM instances that can perform multiple functions: active provisioning, standby replacement, and key management operations. Each HSM is designed to be multi-functional, capable of taking on different roles as needed. This universality reduces overall system complexity compared to having specialized dedicated HSMs for each function, while maintaining high provisioning availability through role flexibility.
Solution Approach 2:
The system employs continuous monitoring and feedback mechanisms that track HSM operational status, security events, and performance metrics. This feedback enables automatic role transitions and load balancing decisions, reducing the operational complexity of managing multiple HSMs. The feedback-driven automation maintains provisioning availability while simplifying system management through intelligent, adaptive control.
4Device complexity
If a single HSM is used, then system management is simplified, but any HSM failure causes significant downtime and cost
Solution Approach 1:
The system performs preliminary setup of multiple HSM instances with pre-configured roles and relationships before any failure occurs. The hierarchical structure, key wrapping relationships, and standby assignments are all established in advance through automated enrollment processes. This preliminary configuration reduces both management complexity and recovery time, as the system is already prepared for failure scenarios without requiring complex post-failure setup.
Data Source
AI summary
A provisioning control apparatus is configured to be coupled to a provisioning equipment server, wherein the provisioning equipment server is electrically connectable with one or more electronic devices for provisioning the electronic devices with security sensitive provisioning data. The provisioning control apparatus includes a processor configured to generate a group context for sharing the group context with a first further provisioning control apparatus for creating a group of provisioning control apparatuses. The group context includes a group private key, a certificate for the group private key and a group encryption key used for encryption and/or decryption and the first further provisioning control apparatus is configured to be coupled to the provisioning equipment server. The processor is configured to generate the security sensitive provisioning data based on the group context. The provisioning control apparatus includes a communication interface configured to provide the security sensitive provisioning data to the provisioning equipment server.