Migration to emCA (Private PKI)

Organizations migrate to emCA when they need to modernize or consolidate their private PKI infrastructure. This may involve replacing legacy CAs, restructuring trust hierarchies, or introducing centralized governance across business units.

Common Migration Drivers

• Legacy CA infrastructure nearing end-of-life • Multiple decentralized private CAs without unified governance • Inconsistent certificate templates and policies • Manual issuance and renewal processes • Compliance requirements for key management and audit logging • Need for integration with automated provisioning workflows

Typical emCA Migration Scenarios

1. Legacy Microsoft AD CS to emCA

Organizations running AD CS may migrate to emCA to achieve:

• Better lifecycle automation • Multi-tenant or multi-environment segregation • API-driven certificate issuance • Advanced reporting and audit capabilities

Migration Steps:

• Discover all certificates issued by AD CS using CERTInext Discovery • Identify active templates and key usage policies • Define equivalent certificate profiles in emCA • Configure emCA Connector in CERTInext • Reissue certificates during renewal cycles under emCA • Gradually retire legacy CA infrastructure

This phased renewal approach avoids mass certificate replacement.

2. Consolidation of Multiple Private CAs

Large enterprises may operate multiple CAs across:

• Different regions • Separate subsidiaries • Business units • Development vs Production environments

Migration Objective:

• Build a centralized Root and Intermediate hierarchy in emCA • Standardize policies across the organization • Maintain trust continuity

Migration Approach:

• Map existing trust chains • Recreate issuing CA structure within emCA • Reissue intermediate certificates where required • Align certificate validity periods and cryptographic strength • Implement centralized governance through CERTInext

3. Key Security Upgrade Migration

Organizations upgrading from:

• SHA-1 to SHA-256 • 2048-bit RSA to 3072/4096-bit RSA • RSA to ECC

Can use emCA migration as a cryptographic modernization initiative.

Process:

• Define new certificate templates • Configure updated key profiles • Perform phased rekey + reissue • Enforce compliance through policy controls

emCA Migration Methodology

Phase 1 – Assessment

• Full certificate discovery • Template and key algorithm analysis • Trust chain mapping • Expiry and renewal risk evaluation

Phase 2 – Design

• Define Root and Intermediate hierarchy • Create certificate profiles • Configure issuance policies • Establish CRL/OCSP endpoints

Phase 3 – Implementation

• Configure emCA Connector • Test issuance and renewal • Validate provisioning automation • Run pilot migration

Phase 4 – Controlled Rollout

• Migrate certificates during renewal windows • Monitor validation and trust continuity • Decommission legacy CA gradually

Phase 5 – Optimization

• Enable automated renewal scheduling • Implement vulnerability scanning • Enforce key rotation policies

Key Migration Considerations

• Trust chain continuity • Cross-signing if required • Application compatibility • HSM key storage alignment • Revocation infrastructure readiness • Compliance logging