Forming Secure Perimeters in State Registers: Architecture of Isolation and Control

A modern state register is not just a database, but a complex ecosystem with hundreds of entry points. In 2018, ensuring the security of such systems is impossible without clear segmentation. IQusion IT LLC (IQusion) implements an approach to building multi-level data processing perimeters, which allows localizing risks and ensuring the resilience of critical state assets.

We are transforming register security from a perimeter model (“protected wall”) to a model of deep, echeloned isolation, where each segment has its own autonomous protection.

Logical and Physical Perimeters: Levels of Protection Abstraction

To minimize the attack surface, we divide the infrastructure into several types of perimeters, each performing a specific role in the data lifecycle:

Physical Isolation (Air Gap or VLAN): Separating server equipment, where reference register data is stored, from general data transmission networks.

Logical Segmentation: Using microservice architecture to separate processing functions. For example, the extract generation service is physically and logically separated from the record modification service.

Administration Perimeter: A separate segment for system management, accessible only through secure gateways using two-factor authentication.

PKI and QES in Inter-Perimeter Interaction

The most critical point is the moment of data transfer between perimeters. To ensure the integrity and non-repudiation of actions, IQusion IT integrates Public Key Infrastructure (PKI) technologies directly into inter-service interaction protocols.

Any request from an external perimeter (e.g., from a public portal) to an internal one (the register core) must be signed with a Qualified Electronic Signature (КЕП). This creates a “digital footprint” that cannot be forged and allows for precise identification of the initiator of each transaction within state standards.

Hybrid Architecture for Critical Segments

In 2018, IQusion offers the use of hybrid models to balance availability and security. The most vulnerable components of the register are placed in a Private Cloud environment, which meets the requirements of ГЗІ, while less critical front-end services can scale dynamically.

Advantages of the Hybrid Approach:

Fault Tolerance: Data replication between geographically distributed sites within secure communication channels.

Speed: Public services operate quickly without creating direct load on the system core.

Control: The register owner retains full physical control over the servers where confidential information is stored.

Centralized Monitoring and Logging

Perimeter isolation would be incomplete without a system for total event control. Centralized logging is a mandatory requirement of КСЗІ and a key security tool.

Monitoring Level	Object of Control
Infrastructure	Attempts of unauthorized access to ports, network configuration changes.
Application	Logging of every attempt to view, edit, or delete records in the register.
Administrative	Recording actions of system administrators within internal perimeters.

The use of SIEM systems allows for real-time correlation of events from different perimeters. For example, an attempt to log in with an administrator account from an atypical IP address automatically blocks access to a critical segment even before any damage is done.

Creating secure perimeters is not just about installing firewalls. It is a deep architectural work performed by IQusion IT LLC specialists to ensure that state registers remain a reliable foundation for Ukraine’s digital economy.