Cross-Regional Key Replication Vault Architecture
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Solution Overview
Problem
Cloud infrastructure systems lack flexibility in key management, as keys generated for users are typically stored within a single region, making them vulnerable to data loss in case of regional failures and limiting user control over key replication.
Innovation Solution
A framework for cross-regional replication of keys across non-overlapping regions in a cloud infrastructure, allowing users to dynamically select secondary regions for data replication, using a Key Management Service (KMS) that includes a Hardware Security Module (HSM) and Cluster Management services for fault-tolerant key management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If keys are stored in a single primary region for simplified management, then device complexity is reduced, but reliability deteriorates due to vulnerability to regional failures
Solution Approach 1:
The system segments key storage across multiple geographic regions by creating primary and secondary vaults in different regions. Keys are divided into key shares that are distributed across these segmented locations, so that no single region holds the complete key, thereby improving reliability while maintaining manageable complexity through structured segmentation.
Solution Approach 2:
The patent implements local quality by allowing different regions to have different roles (primary vs. secondary) with specialized functions. The primary region handles key generation and main operations, while secondary regions provide backup and disaster recovery. This localized specialization improves reliability without requiring complex coordination across all regions simultaneously.
2Reliability
If keys are replicated across multiple regions for improved reliability, then data availability is enhanced, but device complexity increases due to replication management
Solution Approach 1:
The system uses copying to create secondary vaults that are exact replicas of primary vaults in different regions. Instead of implementing complex real-time synchronization, the patent creates copy instances of the vault structure and key shares, which simplifies replication management while ensuring data availability. The copy operation is straightforward compared to continuous synchronization protocols.
Solution Approach 2:
The patent performs preliminary actions by pre-configuring secondary vaults and key shares before failures occur. The replication infrastructure is set up in advance with predetermined regions and structures, so that when a failure occurs, the system can immediately switch to the pre-prepared secondary vault without complex real-time decision-making or configuration during the crisis.
3Reliability
If cross-regional replication is implemented for disaster recovery, then reliability is improved, but loss of time increases due to entropy verification and mutation operations
Solution Approach 1:
The system applies partial action by performing entropy verification selectively rather than on every single operation. The patent uses entropy values to detect batches of mutations and verifies only when necessary, rather than checking every individual key operation. This reduces the time overhead while maintaining reliability by catching actual errors when they occur.
Solution Approach 2:
The patent implements continuity by performing mutations and replications continuously in the background without interrupting normal key operations. The entropy verification and mutation propagation occur as continuous processes rather than batch operations, ensuring that disaster recovery capabilities are maintained without causing noticeable delays in service operations.
4Adaptability or versatility
If users have flexible control over key replication regions, then adaptability is improved, but device complexity increases due to user configuration management
Solution Approach 1:
The system implements dynamics by allowing the replication configuration to be dynamic rather than static. Users can modify which regions serve as primary or secondary, add or remove replication targets, and adjust key share distributions without reconfiguring the entire system. This dynamic adaptability allows users to respond to changing requirements while the underlying system handles the complexity of these changes automatically.
Solution Approach 2:
The patent applies self-service by enabling users to perform their own key management operations including replication configuration, key generation, and vault management through standardized interfaces. The system provides self-service capabilities that allow users to configure replication according to their needs without requiring complex administrative procedures or expert intervention, thereby improving adaptability while keeping the interface simple.
Data Source
AI summary
Discussed herein is a technique for replication of keys across regions of a cloud infrastructure. A first vault is created in a first region. The first vault stores a plurality of records, each of which is associated with a key and corresponding metadata. A second region, different from the first region, is selected where replication of the plurality of records is desired. A second vault is created in the second region. The plurality of records are relayed from the first vault to the second vault, so that each of the plurality of records is replicated in the second vault based on an entropy value of the record. A mutation operation executed with respect to the first vault is stored as a new record in the first vault. The new record is transmitted to the second vault, which is updated to reflect the mutation operation performed on the first vault.