[Insight] Hybrid Strategy for the Cloud 3.0 Era: ktcloud Meets Azure for True Sovereignty #2 - Implementation Strategy and Regulatory Response

The core of the Cloud 3.0 era lies in combining Azure's AI capabilities with ktcloud's domestic regulatory response capacity, operating sensitive data and innovative workloads separately.

The starting point for hybrid design is data classification and placement. Ultra-sensitive data such as national security, core personal information, and financial data is placed on ktcloud, while innovation data such as general business documents or de-identified data is placed on Azure or ktcloud, matching CSAP requirement levels and usage purposes.

Network and ID integration are also important.

• Network: Dedicated lines such as ExpressRoute are more advantageous for performance and security than internet VPN, and the approach proposes a configuration that directly connects an Azure dedicated line within the ktcloud IDC.
• ID management: SSO is configured centered on Microsoft Entra ID, designed so that a single login allows movement between both clouds.

Security is strengthened through zero trust principles. The approach emphasizes encrypting not only data at rest and data in transit but also data in use, and for Azure, proposes using Confidential Computing and CMK (Customer Managed Key) to make decryption impossible even for Microsoft employees.

Legal and regulatory response is another pillar of the hybrid approach. For public cloud, placement differs by CSAP grade: high/medium grade workloads require a dedicated environment from ktcloud, a domestic CSP, while low grade workloads can utilize Azure. For overseas law, particularly response to the CLOUD Act, the approach presents data residency, key control, confidential computing, and domestic placement of the most sensitive data as staged lines of defense.

From a PIPA compliance perspective, personal information processing policies and consent procedures must be thoroughly followed, and even when using Azure's Korea region, some global services may cause replication outside the region, so the data processing characteristics of each service must be checked. Ultimately, the core is a separated hybrid architecture in which data requiring the protection of domestic law is kept on ktcloud, while only areas requiring AI and global scalability are sent to Azure.