12 Security

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Raja Jeevan Kumar Maduri edited this page Aug 4, 2026 · 1 revision

12. Security & Compliance Architecture

Zero-Trust RBAC Multi-Tenant Isolation (`backend/shared/security/tenant_isolation.py`)

Automatically validates tenant_id context on all queries and endpoints.
Enforces role permission hierarchy (Author → Steward → Approver → Admin).

CMEK Envelope Encryption (`backend/shared/security/encryption.py`)

Field-level AES-256 encryption protecting sensitive properties using Customer-Managed Encryption Keys.

Cryptographic Audit Logging (`backend/shared/security/audit_logger.py` & `worm_backup.py`)

Append-only SHA-256 hash chaining creating tamper-evident audit logs.
WORM snapshot manifests exported to S3 vaults.

Injection Defense (`backend/shared/security/input_validator.py`)

Regex sanitizer blocking Cypher query injection, NoSQL injection, prompt injection, XSS attacks, and path traversal.