HSM Management Hub for Cryptographic Key Synchronization
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Solution Overview
Problem
Maintaining synchronized cryptographic keys across multiple Hardware Security Modules (HSMs) in large-scale computing environments is challenging due to their non-exportability, which complicates fleet management and cryptographic operation performance.
Innovation Solution
Implementing an HSM management hub that organizes HSMs into a fleet, using a fleet key for synchronization and encryption, and employing public-private key cryptography to distribute and manage cryptographic information, ensuring secure and centralized access control while allowing for key rotation and backup/restore operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple HSMs are used to provide cryptographic functions in distributed computing environments, then the performance and capacity for cryptographic operations is improved, but the difficulty of maintaining synchronized cryptographic keys across the fleet increases
Solution Approach 1:
A key distribution server is introduced as an intermediary component between HSMs and key management systems. This server receives cryptographic keys, encrypts them using public keys of individual HSMs, and distributes the encrypted keys to the appropriate HSMs. This mediator approach centralizes key management complexity while allowing multiple HSMs to operate in parallel for improved cryptographic operation performance.
Solution Approach 2:
The key distribution system is segmented into distinct functional components: a key management authority for generating keys, a key distribution server for encryption and distribution, and individual HSMs for cryptographic operations. This segmentation allows each component to be optimized independently, improving overall system productivity while managing complexity through modular architecture.
2Reliability
If cryptographic keys are made non-exportable for security, then the security of the cryptographic system is improved, but the ease of maintaining synchronized keys across multiple HSMs deteriorates
Solution Approach 1:
The key distribution server acts as a secure intermediary that receives keys from the key management authority, encrypts them using each HSM's public key, and delivers the encrypted keys to the HSMs. This mediator enables key distribution without requiring the keys to be exported in unencrypted form, maintaining security while enabling synchronization across multiple HSMs.
Solution Approach 2:
Each HSM is pre-configured with its own public key before joining the fleet. When a new key needs to be distributed, the system uses these pre-established public keys to encrypt and deliver the new key to the appropriate HSMs. This preliminary setup enables secure key synchronization without requiring subsequent complex key export operations.
Data Source
AI summary
An HSM management hub coordinates the distribution and synchronization of cryptographic material across a fleet of connected hardware security modules (“HSMs”). Cryptographic material is exchanged between HSMs in the fleet in a cryptographically protected format. In some examples, the cryptographic material is encrypted using a common fleet key maintained by the HSMs in the fleet. In other examples, the cryptographic material is protected using asymmetric cryptographic keys that are associated with the members of the HSM fleet. The HSM management hub may be used to divide the HSM fleet into subdomains by providing domain keys to subsets of HSMs within the HSM fleet. Cryptographic information that is encrypted with particular domain keys can be distributed across the entire HSM fleet, and restricted to use by authorized HSMs that are in possession of the particular domain keys.