Security Built Into Design & Delivery.
Not Added as an Afterthought.
At Zelvori, security and privacy are engineering requirements, not marketing slogans. We turn real-world business workflows into scalable digital products backed by defensible architecture, verified controls, and honest operational boundaries.
No software system can honestly be described as “100% secure,” “unhackable,” or “zero risk.” Real security is an ongoing engineering discipline: threat modelling before code, enforcing least-privilege boundaries, validating inputs, maintaining private backups, and validating controls through test evidence. We distinguish what is verified in code from what requires cloud deployment or client operational governance.
A Layered Security Architecture for Modern Web Products
Every system we engineer respects clear trust boundaries. Incoming requests pass through edge inspection, identity verification, schema validation, and domain-level authorization before reaching private data services.
This diagram illustrates Zelvori’s standard reference architecture for serious, multi-tenant digital products. It represents our security-by-design blueprint. It is not an assertion that every prospective client application already operates all six layers—actual components, hosting targets, and threat mitigations are explicitly defined, threat-modeled, and budgeted in each project’s Statement of Work (SOW).
Cloud KMS Secret Vaults • Append-Only Audit Logging • Centralized Telemetry & Prometheus Alerts • Automated Daily Encrypted Backups • Documented Incident Runbooks
Identity & Policy Boundary
Authentication & Tenant Context
Primary Responsibilities
Authenticates user identity, enforces mandatory MFA for administrative workflows, issues signed short-lived tokens, and binds every request to an authenticated tenant scope.
Architectural Components
- OIDC / OAuth 2.0 Identity Provider
- Multi-Factor Authentication (MFA)
- Session Token Verification
- Tenant & Org Scope Injection
Security & Reliability Gate
Threats Directly Mitigated
- •Credential stuffing
- •Privilege escalation
- •Cross-tenant authentication bypasses
14 Core Security Controls & Defensible Statuses
We never claim a control is verified without evidence from code, configuration, or operational records. Inspect our current evaluation across application security, identity, cloud infrastructure, and operations.
Practical Data Protection: What We Assess for Every Project
Privacy is not a legal disclaimer added after launch. It begins with the fundamental decision of what data we choose not to collect in the first place.
Visible Architecture Boundary: Static Website vs. Production Applications
Clear separation of responsibilities & attack surfacesThe public website you are viewing at zelvori.software is an exported static site hosted on GitHub Pages. It operates with zero server-side database, zero user accounts, and zero secret handling. Our contact actions generate standard client-side email drafts with zero tracking cookies or external analytics pixels.
In contrast, production client applications that process sensitive customer, patient, or financial records are engineered with dedicated backend runtimes, private VPC databases, strict KMS encryption, server-side authorization, and isolated integration adapters. We never run sensitive business logic on a static host.
1. What data is genuinely needed?
We apply strict data minimisation. Never collect fields for hypothetical future features.
2. Where is it processed and stored?
Explicit network placement in private cloud subnets with geographic data residency rules.
3. Who can access it and how is it revoked?
Role-based access, least privilege, and audited offboarding processes for departing personnel.
4. How long is data retained?
Documented retention schedules with automated purging scripts for expired transactions.
5. How are deletions, exports, and backups handled?
Soft-delete lifecycles, structured CSV/JSON customer exports, and air-gapped backup storage.
6. Which external subprocessors receive data?
Audited integration boundaries for payment, SMS, email, or AI providers with scoped API tokens.
7. How are incidents and regulatory notices handled?
Defined response workflows aligned with applicable data protection requirements (e.g. DPDP Rules 2025).
8. How are AI and automated workflows restricted?
Strict isolation ensuring customer documents are never leaked to public training corpuses.
From Threat Model to Production: Gates G0 to G5
We apply NIST SP 800-218 (Secure Software Development Framework) and OWASP best practices. Each stage has explicit work performed and a measurable Definition of Done before release.
Discovery & Threat Modelling
Architecture & Data-Flow Review
Build & Defensive Hardening
Security Verification & QA
Realistic UAT & Handover
Operate & Maintain
Configurable Security Profiles: Match Controls to Risk
We do not sell a one-size-fits-all “secure software” package. A public marketing website requires different controls and budgets than an enterprise healthcare or financial platform.
Business Application Profile
Typical Fit: Company CRMs, customer portals, staff dashboards, booking and workflow systems.
Included Engineering Baseline
- ✓Project threat model and trust boundary mapping prior to build
- ✓Authentication architecture (OIDC/OAuth) with optional MFA for staff
- ✓Server-side Role-Based Access Control (RBAC) on all API endpoints
- ✓Tenant context injection on every query to prevent IDOR/BOLA
- ✓Structured application logging with sensitive field redactors
- ✓Documented daily automated database backup and restore plan
- ✓Automated integration tests and negative access-control test suite
Explicitly Excluded / Not Implied
- ✕No claim of formal ISO 27001, SOC 2, or PCI DSS certification
- ✕No guarantee of 100% breach prevention or zero zero-day exposure
- ✕No multi-region automatic disaster recovery failover without cloud budget
Standard Evidence & Delivery Artefacts
Sector Realities: Why Security Controls Differ by Industry
Every vertical presents unique legal risks, operational failure modes, and regulatory boundaries. We design specific mitigations without making unsubstantiated compliance promises.
Healthcare & Clinics
Patient encounters, scheduling, and health records require strict least privilege, separate appointment vs medical record boundaries, and clinical owner review.
Key Architectural Controls
- ✓Role-specific workspaces (reception, doctor, nurse, lab, billing, pharmacy)
- ✓Encounter-level access rules and canonical patient identity mapping
- ✓Clinical data excluded from ordinary logs and unencrypted notifications
- ✓Tested downtime, manual fallback workflows, and database restore drills
- ✓Clinical owners must sign off on clinical rules, alert thresholds, and discharge reports
Regulatory Realities & Legal Boundaries
- !Digital Personal Data Protection (DPDP) Rules 2025 compliance requires deployment-specific review with legal counsel
- !ABDM interoperability requires accredited M1/M2/M3 adapter certification and cannot be claimed from software design alone
- !Software is an administrative tool; it never replaces qualified clinical judgment or medical authority
What Clients Receive: 9 Standard Verification Artefacts
Real trust is evidenced in writing. Clients receive tangible architecture diagrams, access control matrices, restore drill records, and SBOM outputs to support their internal audits and board reviews.
Security Scope Statement
Explicit boundary definitions: what components were built, what was excluded, testing methodology, target deployment environment, and research cut-off date.
Architecture & Data-Flow Diagrams
Trust boundary diagrams, data store mappings, integration gateways, identity checkpoints, and network isolation topology. Scales in depth with workload risk.
Data Inventory & Retention Schedule
Structured classification of collected data fields, processing purpose, storage geography, retention schedules, and automated deletion/purge mechanisms.
Role & Permission Matrix
User personas mapped to permissions; tenant/matter/patient boundaries; negative access-control test logs proving unauthorized callers cannot read foreign records.
Test & Security Scan Summary
Automated SAST scans, dependency vulnerability logs, unit test pass rates, edge cases evaluated, and remediation status for discovered vulnerabilities.
Software Bill of Materials (SBOM)
Machine-readable inventory of all direct and transitive dependencies, exact semantic versions, open-source licenses (SPDX), and vulnerability triage.
Backup/Restore & RPO/RTO Report
Documented backup locations, encryption status, retention cadence, and evidence of at least one successful test restoration rehearsal prior to go-live.
Incident Response & Support Runbook
Designated escalation contacts, severity definitions (P1-P4), containment steps, regulator/customer notification decision process, and support hours.
Ownership & Handover Documentation
Documented handover of source code repositories, domain DNS, cloud accounts, database instances, secret rotation procedures, and zero retained vendor lock-in.
The Zelvori “Verify Before Claiming” Principle
We will never provide fabricated certifications, fake audit badges, or boilerplate compliance seals. When you engage Zelvori, you receive real architecture briefs, real negative test records, and verifiable recovery evidence produced specifically for your deployment.
Plan a Security-Sensitive Digital Engagement
Whether you are architecting a multi-tenant business portal, a legal matter system, or a clinical workflow, we begin with honest discovery and clear threat boundaries.