Security Architecture for Mission-Critical Engineering

Access to data within PMX OS is enforced at the individual graph node and attribute level using a hybrid of Role-Based Access Control (RBAC) and Attribute-Based Access Control (ABAC).

• Principle of least privilege strictly enforced across all user personas.
• SAML 2.0 and OpenID Connect (OIDC) enterprise single sign-on integration.
• Mandatory multi-factor authentication (MFA) with FIDO2 / WebAuthn hardware token support.
• Dynamic scoping ensuring clinical evaluators see only designated study data without exposing raw hardware blueprints.

Enterprise medical portfolios demand categorical isolation. PMX OS is engineered with architectural boundaries that prevent cross-tenant data leakage or commingling.

• Dedicated schema-level and database-level isolation per enterprise customer.
• Support for sovereign Virtual Private Cloud (VPC) and customer-managed data plane deployments.
• Cryptographic memory barriers separating multi-tenant cache partitions and graph traversal indexes.
• Zero shared model training: customer IP and graph structures are never utilized to train shared AI weights.

All data traveling into, out of, or within the PMX OS intelligence cluster is encrypted using modern cryptographic standards.

• In Transit: TLS 1.3 enforced with strict HTTP Strict Transport Security (HSTS) and ephemeral Diffie-Hellman key exchanges.
• At Rest: AES-256 bit encryption applied across all persistent graph databases, object stores, and write-ahead logs.
• Customer-Managed Encryption Keys (CMEK) support via AWS KMS, Azure Key Vault, or Google Cloud KMS.
• Automated key rotation and envelope encryption protocols.

In regulated domains, the integrity of the audit record is paramount. PMX OS utilizes append-only, cryptographically hashed event streams.

• Every state transition—requirement creation, CAD file upload, code linkage, or human approval—is sealed with SHA-256 cryptographic hashes.
• Merklized event trees allow instant verification that historical records have not been altered or deleted.
• Logs capture precise actor identity, verified timestamp, IP address, and exact semantic payload diff.
• Exportable in open, standard audit formats ready for regulatory inspection.

Medical design histories span decades. Our disaster recovery philosophy is engineered for extreme data durability and continuous availability.

• Continuous write-ahead log shipping enabling point-in-time recovery (PITR) to the second.
• Geographically disparate multi-region data replication to protect against regional cloud outages.
• Routine automated restoration drills to verify backup image integrity.
• Strict Recovery Point Objective (RPO) and Recovery Time Objective (RTO) architectural targets.

Security is treated as a continuous engineering discipline integrated directly into every pull request and build artifact.

• Automated Static Application Security Testing (SAST) and Software Composition Analysis (SCA) on every commit.
• Zero high/critical severity dependency vulnerabilities tolerated in release candidates.
• Independent third-party penetration testing conducted on core graph interfaces.
• Hermetically sealed build environments generating cryptographic Software Bills of Materials (SBOM).