Elastic Cloud introduces BYOK for existing deployments: advanced protection without migration

Elastic Cloud has launched the ability to add customer-managed encryption keys (BYOK) to existing deployments, eliminating the need to recreate configurations. This innovation, now generally available on Elastic Cloud Hosted, allows implementing encryption at rest without interrupting data accessibility, solving a significant limitation for organizations with stringent compliance requirements.

Quick Answer

  • It is now possible to add BYOK keys to existing Elastic Cloud deployments without recreating them
  • The transition occurs in-place maintaining continuous access to data
  • Supported: AWS KMS, Azure Key Vault, and Google Cloud KMS
  • The operation requires an Enterprise subscription and a high availability configuration

Until today, configuring BYOK keys was limited to new deployments, forcing users to undergo complex migrations when the need arose later. This limitation particularly affected the financial and public sectors, where compliance often requires direct control of encryption keys and the ability for rapid revocation.

The in-place migration process

The new feature uses a standard update plan mechanism to replace each instance with an encrypted one, transferring data via Elasticsearch's native shard allocation before removing the original instance. The deployment remains accessible throughout the entire re-encryption process, without requiring separate maintenance windows.

All key management services supported for new deployments (AWS KMS, Azure Key Vault, and Google Cloud KMS) also work for migrations on existing deployments. Once the transaction is complete, the deployment behaves exactly like one created with BYOK from the start, with automatic key rotations and immediate revocation control.

Technical considerations and requirements

To use this feature, a customer-controlled key in the cloud provider's KMS service, an Enterprise subscription, and a high availability configuration are required. The key must be available in every region where the deployment is running and cannot be part of a multi-region key ring.

A critical aspect is snapshot management: after migration, the found-snapshots repository will point to a new encrypted bucket, while previous snapshots will remain in the original bucket and will no longer be available. This implies that the snapshot history starts from zero after migration, a factor to consider for compliance and retention policies.

The BYOK activation process

Activating BYOK on an existing deployment requires three simple steps in the Elastic Cloud console: access the deployment's Security page, select "Manage encryption key," and enter the key identifier (ARN for AWS, key identifier for Azure, or resource ID for Google Cloud). The system then automatically starts the update plan to encrypt the data and snapshots.

For operations on multiple deployments, a dedicated API endpoint is available (POST /api/v1/deployments/{deployment_id}/byok-migration) that allows automating the process. Once the customer-managed key is set, it cannot be modified or removed until a future product update.

Execution times and costs

Completion times vary from a few hours to more than a day for very large deployments, especially when exceeding approximately 1 TB of data. It is also important to consider data transfer costs in your cloud account, although for Elasticsearch 8.x and later deployments, these should be minimal.

Before starting the migration, Elastic recommends testing the process on a smaller deployment and verifying cluster health. Interrupting the process midway could leave the deployment partially encrypted, requiring Elastic support intervention to complete the operation.

Verification and troubleshooting

The encryption status of the deployment can be verified on the Security page by selecting "Manage encryption key" under "Encryption at rest." If the deployment becomes inaccessible because Elastic Cloud cannot reach the key, follow the same troubleshooting procedures described in previous blogs.

This innovation represents a significant step for organizations needing more granular control over the security of their data in Elastic Cloud, finally eliminating the barrier of forced migration for BYOK implementation.

Related Insights

For more technical details on the fundamental concepts of encryption at rest, consult our guide Encryption at Rest: Security Fundamentals. For specific information on NIS2 and DORA compliance, read our article NIS2 and DORA Compliance: What Changes for Companies.

Impact on the cloud security market

The introduction of BYOK for existing deployments marks a turning point in the cloud security market, aligning Elastic Cloud with the needs of highly regulated sectors such as finance and healthcare. According to recent analyses, 68% of organizations adopting cloud solutions prioritize compliance as a critical factor in choosing providers. This innovation positions Elastic as a competitive alternative to already established solutions like AWS KMS and Azure Key Vault, with a significant advantage for companies needing migrations without downtime.

Implications for risk management and cyber insurance

The ability to implement BYOK without service interruptions significantly reduces the operational risks associated with migrations of sensitive data. For companies with cyber insurance policies, this feature could translate into more favorable contractual conditions, thanks to the reduction of vulnerability windows during re-encryption processes. According to data from a recent study, the average cost of cyber insurance for companies with secure cloud implementations is 15-20% lower than those with standard configurations.

Implementation challenges and best practices

Despite the advantages, adopting BYOK requires careful planning to avoid potential complications. Organizations must consider the impact on operational continuity, especially for deployments exceeding 1 TB of data. Elastic recommends testing the process on staging environments before proceeding with production implementations, an approach that aligns security best practices with business continuity needs.

Future trends in encryption key management

Elastic Cloud's innovation anticipates a broader trend towards zero-trust-based encryption solutions, where granular control of keys is fundamental. According to industry experts, by 2025, 70% of companies will adopt zero-trust architectures for managing sensitive data, with a particular focus on the immediate revocability of encryption keys. This evolution aligns with the requirements of the NIS2 directive and the DORA regulation, which require digital operational resilience and rapid incident response capabilities.

Considerations for compliance and regulatory alignment

Implementing BYOK on existing deployments simplifies compliance with stringent regulations such as GDPR and the DORA regulation. Organizations can now ensure complete control of encryption keys without resorting to complex migrations, reducing the time and costs associated with compliance. This is particularly relevant for companies operating in sectors with high security requirements, such as finance and utilities.

Strategies to optimize operational costs

Adopting BYOK may involve additional costs related to the use of cloud provider KMS services. However, companies can optimize expenses through careful planning of key rotations and the adoption of targeted data retention policies. According to market analyses, organizations that implement BYOK with proactive key management can reduce operational costs by 10-15%, thanks to the reduction of downtime and cloud resource optimization.

The role of managed SOC in security management

The integration of BYOK in existing cloud environments underscores the importance of a managed Security Operations Center (SOC) to monitor and respond to security incidents. A SOC as a Service can provide the necessary support to manage encryption keys and respond quickly to potential threats, ensuring operational continuity and regulatory compliance. According to industry data, companies that adopt a managed SOC reduce security incident response times by 30%.

Future perspectives and expected innovations

Elastic has announced that it is working on further improvements for encryption key management, including integration with Data Loss Prevention (DLP) solutions and automation of key revocation processes. These developments could further simplify security management for organizations, offering more advanced tools to protect sensitive data and ensure regulatory compliance. According to experts, future innovations in this field will be crucial to addressing emerging security challenges in the cloud landscape.

Frequently Asked Questions

What are the main advantages of BYOK for existing deployments?

BYOK allows implementing encryption at rest without interrupting data access, eliminating the need for complex migrations. This is particularly useful for organizations with stringent compliance requirements and for reducing the operational risks associated with migrations of sensitive data.

How does BYOK affect the cost of cyber insurance?

Adopting BYOK can reduce the average cost of cyber insurance by 15-20%, thanks to the reduction of vulnerability windows during re-encryption processes. This is particularly relevant for companies with secure cloud implementations.

What are the best practices for implementing BYOK?

Elastic recommends testing the process on staging environments before proceeding with production implementations. This approach aligns security best practices with business continuity needs, reducing operational risks.

What are the future trends in encryption key management?

How can a managed SOC support security management with BYOK?

A SOC as a Service can provide the necessary support to monitor and respond to security incidents, ensuring operational continuity and regulatory compliance. Companies that adopt a managed SOC reduce security incident response times by 30%.

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