Enterprise Security Architecture, RBAC & Immutable Audit Governance

Modern enterprise ERP systems safeguard sensitive financial ledgers, customer contracts, payroll details, and tax records. BIZA enforces zero-trust security principles, strict workspace segregation, fine-grained role-based access control (RBAC), and immutable audit trails across every business workflow.

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1. Workspace Segregation & Session Security

BIZA isolates tenant environments through a rigorous security boundary:

• Cryptographic Token Verification: Every client request carries a cryptographically signed session token. Requests without verified credentials or valid organization context are rejected at the edge perimeter.
• Organizational Boundary Checks: Access to financial vouchers, inventory movements, customer records, and tax filings is strictly bound to authorized organization members. Cross-tenant access is physically impossible.
• Session Lifecycle Control: Configurable session timeouts, multi-factor authentication (MFA/2FA) enforcement, and instant credential revocation ensure lost or compromised devices cannot access enterprise ledgers.

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2. Granular Role-Based Access Control (RBAC)

Organizations can enforce the principle of least privilege using customizable roles and permissions:

• Standard Business Roles: Administrator, Financial Controller, Chief Accountant, Sales Manager, Purchasing Officer, Warehouse Supervisor, Project Manager, and Auditor.
• Separation of Duties (SoD): Separate permissions exist for drafting, reviewing, approving, and voiding documents. For example, a junior purchasing officer can prepare purchase orders (po.create), but only an authorized controller can release payment approvals (payment.approve).
• High-Risk Action Gates: Critical operations—including fiscal year closing, journal entry reversals, bank account modifications, and VAT return finalization—require elevated administrative privileges with mandatory dual-authorization.

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3. Tamper-Evident, Immutable Audit Logging (`audit_log`)

Every create, update, approval, and void action across the entire ERP platform is permanently recorded in an immutable audit ledger:

• Audit Metadata Captured:
  • Exact UTC timestamp with microsecond precision.
  • User identity (User ID, full name, registered email address).
  • Originating IP address and user agent.
  • Target entity name, document number, and primary identifier.
  • Operational event (INSERT, UPDATE, DELETE, APPROVE, VOID).
• Field-Level JSONB State Diffs: The audit log stores complete before and after snapshots for every modified record, pinpointing exact line-item changes, price adjustments, credit limit overrides, and bank account updates.
• Immutable Storage: Audit logs are write-once, append-only records that cannot be modified, edited, or truncated by standard application users or tenant administrators. This provides an indisputable chain of custody for external financial auditors, statutory tax reviews, and internal compliance investigations.

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4. Comprehensive Encryption & Data Protection

• Data in Transit: All traffic between clients, APIs, and microservices is strictly encrypted using TLS 1.3 with modern cipher suites. Insecure HTTP traffic is automatically upgraded.
• Data at Rest: All operational databases, document repositories, and attachment stores (PDF invoices, scanned contracts, receipts) are encrypted at rest using industry-standard AES-256 encryption.
• Automated Disaster Recovery (PITR): Continuous transaction write-ahead log (WAL) archiving enables Point-in-Time Recovery to any historical minute. Automated nightly offsite snapshots and scheduled weekly restore verification drills ensure business continuity.