PGEE TDE Key Management: Securing WAL and Backups On-Premises
CYBERTEC PGEE TDE secures WAL, temp files, and backups in on-premises environments. Manage encryption keys locally with rotation policies and repl_proxy...
28 Sept 2026 · 3 min read
CYBERTEC PGEE Transparent Data Encryption protects WAL, temporary files, and backups in on-premises environments. Local key management and rotation policies support GCC enterprise requirements.
The Operational Challenge of On-Premises Encryption
Network isolation and data residency rules often block access to external cloud Key Management Services (KMS) in on-premises and private cloud deployments. This setup creates a specific problem: managing encryption keys securely without external APIs. CYBERTEC PostgreSQL Enterprise Edition (PGEE) solves this with an integrated security ecosystem that includes Transparent Data Encryption (TDE) and a dedicated Key Manager.
PGEE TDE protects tables, indexes, Write-Ahead Logs (WAL), temporary files, and backups. Applications and daily operations see no change, so database administrators do not modify application code to enable encryption. The system encrypts data at the storage level. This secures data at rest regardless of the underlying hardware or virtualization layer.
TDE protects tables, indexes, WAL, temporary files, and backups.
Encryption is transparent to applications and requires no code changes.
Designed for environments where external cloud KMS services are unavailable.
Local Key Management and Rotation Policies
The Key Manager is a core part of PGEE security architecture. It lets organizations manage encryption keys and support key rotation policies locally. On-premises environments need this capability to maintain control over cryptographic material. The Key Manager stores keys securely and rotates them according to organizational security policies without external dependencies.
Many compliance frameworks require key rotation. PGEE supports rotation policies natively, allowing database teams to meet these requirements while maintaining operational continuity. The Key Manager integrates with TDE. When keys rotate, the encryption state of the database remains consistent and secure.
Key Manager supports local management of encryption keys.
Supports key rotation policies to meet compliance requirements.
Eliminates dependency on external cloud KMS services.
Securing Write-Ahead Logs and Temporary Files
Write-Ahead Logs (WAL) are critical for database recovery and replication. Standard PostgreSQL stores WAL files on disk in plaintext. This exposes sensitive data if storage media is compromised. PGEE TDE encrypts WAL files. Even if someone removes or accesses the disk directly, the log contents stay protected.
TDE also encrypts temporary files used for sorting, hashing, and other internal operations. This matters in environments where temporary files persist on disk longer than expected or share disk space with other services. By encrypting both WAL and temporary files, PGEE provides a comprehensive layer of protection for data at rest.
WAL files are encrypted to protect recovery and replication data.
Temporary files used for internal operations are also encrypted.
Protection applies to data at rest, independent of application-level security.
Backup Encryption and repl_proxy Workflows
Backups are common targets for data breaches, especially when stored on separate media or transferred between systems. PGEE TDE encrypts backups to protect them from unauthorized access. The repl_proxy component supports encrypted backup workflows, migrations, and re-encryption operations. This supports secure data movement within the environment.
In on-premises deployments, repl_proxy manages the encryption state during backup and restore processes. This helps when migrating data between systems or re-encrypting existing data with new keys. The integration of repl_proxy with TDE maintains encryption throughout the data lifecycle, from initial write to backup and restore.
Backups are encrypted to protect data during storage and transfer.
repl_proxy supports encrypted backup workflows and migrations.
supports re-encryption operations for key rotation or migration.
Deployment in On-Premises and Private Cloud Environments
CYBERTEC PGEE deploys in any environment, including on-premises, Kubernetes, and private clouds. This flexibility lets organizations control their infrastructure while using enterprise-grade security features. The platform supports major operating systems, including RedHat Enterprise Linux, Debian, Ubuntu, Windows, and SUSE. This ensures compatibility with existing on-premises stacks.
Organizations in Saudi Arabia and the GCC often face data residency requirements that mandate local storage and processing. PGEE on-premises deployment, combined with local key management, supports these requirements. It keeps both data and encryption keys within the organization's control. This approach reduces reliance on external services and aligns with local regulatory expectations.
Supports on-premises, Kubernetes, and private cloud deployments.
Compatible with major operating systems including RHEL, Debian, and Windows.
Supports data residency requirements by keeping data and keys local.
Talk to Worlber
Planning a PostgreSQL migration, PGEE deployment, or production database platform? Speak with Worlber Database Services.
Sources
CYBERTEC PostgreSQL Enterprise Edition (PGEE) | CYBERTEC PostgreSQL | Services & Support
Worlber — Private AI for Saudi Arabia · Arabic LLMs & PostgreSQL Enterprise