SecureVault Architecture

A high-level technical breakdown of SecureVault's distributed architecture, core subsystems, data flow pipeline, and security boundaries. Designed for enterprise-grade data protection, zero-trust access, and immutable audit compliance.

System Overview

SecureVault is built on a microservices-based, event-driven architecture optimized for low-latency encryption/decryption operations, horizontal scalability, and strict regulatory compliance. The system is partitioned into distinct security zones with explicit data flow controls.

Client Gateway

SDK / REST / gRPC

Edge LB

WAF / TLS Termination

Ingress Network (VPC-Isolated)

Auth Plane

OIDC / mTLS / Policy Engine

API Gateway

Rate Limiting / Routing

Service Mesh (Internal)

SecureVault Core

Encryption Engine + Metadata DB

KMS / HSM

Key Lifecycle & Signing

Persistent & Backup Tier

Object Storage

Immutable Blobs / WORM

Audit Logger

Tamper-Evident Ledger

DR Cluster

Async Replication

Core Components

🔐

Encryption Engine

Hardware-accelerated AES-256-GCM and ChaCha20-Poly1305 pipelines. Supports field-level and object-level encryption with deterministic IV generation for searchable ciphertext.

🗝️

Key Management Service (KMS)

Centralized key lifecycle management with automated rotation, hierarchical key derivation, and FIPS 140-3 Level 3 HSM integration. Supports BYOK, HYOK, and envelope encryption.

🛡️

Zero-Trust Policy Engine

Real-time access evaluation using OPA-compatible policies. Enforces RBAC, ABAC, and dynamic context-aware restrictions before data materialization.

📜

Immutable Audit Ledger

Cryptographically chained event logs stored in WORM-compliant storage. Provides non-repudiation, real-time compliance reporting, and forensic timeline reconstruction.

🌐

Multi-Region Sync

Conflict-free replicated data types (CRDTs) and async delta synchronization. Guarantees eventual consistency with tunable RPO/RTO targets per tenant.

⚡

Service Mesh & Observability

Internal mTLS communication, distributed tracing (OpenTelemetry), and metric-based auto-scaling. Health probes and circuit breakers protect against cascading failures.

Data Flow Pipeline

All data passing through SecureVault follows a strict, auditable transformation pipeline. Each stage enforces validation, encryption, and logging before proceeding.

1. Ingress & Validation

Client requests hit the Edge LB, which terminates TLS 1.3, strips hop-by-hop headers, and forwards to the API Gateway with JWT/mTLS context attached.

2. Authentication & Authorization

Auth Plane validates credentials against IdP, resolves tenant context, and evaluates zero-trust policies. Denied requests are short-circuited with audit entry.

3. Data Classification & Tagging

Content inspection applies DLP rules, sensitivity labels, and retention policies. Metadata is enriched before entering the encryption pipeline.

4. Encryption & Storage

KMS provides data keys. Encryption engine transforms payload, attaches IV, authentication tags, and policy hashes. Ciphertext is written to immutable object storage.

5. Audit & Replication

Event is committed to the tamper-evident ledger. Delta sync triggers replication to secondary regions if configured. Client receives success acknowledgment.

Security & Compliance Standards

Control Area	Implementation	Standard
Data at Rest	Envelope encryption with unique DEK per object	AES-256-GCM
Data in Transit	TLS 1.3 mandatory, cipher suites restricted	TLSv1.3
Key Storage	FIPS 140-3 Level 3 HSM partitions	HSM
Integrity Verification	SHA-3-512 hash chains + Merkle tree validation	SHA-3
Access Control	RBAC + ABAC + step-up MFA for sensitive ops	Zero-Trust
Compliance	SOC 2 Type II, ISO 27001, GDPR, HIPAA, FedRAMP Moderate	Audited

Integration Endpoints

SecureVault exposes a versioned REST API and gRPC interface for programmatic access. All endpoints require authentication and return structured JSON with consistent error schemas.

HTTP / JSON

POST /v4/vaults/{vault_id}/encrypt
Authorization: Bearer <jwt>
Content-Type: application/json

{
  "payload": "base64_encoded_plaintext",
  "key_id": "km-8f3a92c1-e4b7",
  "ttl_hours": 24,
  "tags": ["pii", "finance"],
  "client_context": {
    "ip": "10.42.0.15",
    "ua": "zenth-sdk/4.2.1"
  }
}

For full endpoint documentation, rate limits, SDK references, and error code maps, visit the API Reference.

Last updated: January 15, 2026 · Download PDF · View Source Diagrams