SENTRI — Smart Entry with Behavioral Intelligence

High-conversion, judge-ready security SaaS prototype for gated communities.

One-Line Pitch

SENTRI does not just record entries. It learns suspicious visitor behavior patterns and helps guards, residents, and admins act in real time.

Live Demo

• Production: https://sentri-app-tau.vercel.app
• Backup URL: https://sentri-84yy7am2z-https-shubhamsahus-projects.vercel.app

Why Judges Care

• 73% style problem framing: repeat visitors can bypass manual systems.
• Explainable AI scoring: every trust score includes factor breakdown.
• Complete ecosystem demo: Guard + Resident + Admin experience.
• Deployable model: low-cost hardware edge with SaaS dashboard economics.

Problem -> Solution Snapshot

Manual Logging	SENTRI
Paper registers, low signal	Face-capture + behavioral scoring
Slow human lookup	Instant trust score and decision band
No pattern memory	Repeat-risk and anomaly detection
Weak audit trail	Full timeline + explainable factors

Architecture at a Glance

flowchart LR
  A[ESP32-CAM Gate Unit] --> B[Guard App / Web Console]
  B --> C[Trust Score Engine]
  C --> D[Decision Band SAFE/CAUTION/WATCHLIST/FLAGGED]
  D --> E[Resident Notification]
  D --> F[Admin Anomaly Feed]
  F --> G[Blacklist and Policy Action]

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Intelligence Core

Trust Score Engine (0-100)

Deterministic score generated from:

• visit frequency
• host diversity
• late-night entry timing
• repeat denial patterns
• phone and external risk signals

Output includes:

• score (0-100)
• band (SAFE, CAUTION, WATCHLIST, FLAGGED)
• factor-level explanation for auditability

Detection Stack

• Isolation Forest signals for unusual behavior patterns
• Rule Engine for deterministic policy checks
• Confidence-aware anomaly feed for operators

3-Role Ecosystem

Role	Interface	Key Actions
Guard	React PWA-style console	scan pass, verify visitor, decision at gate
Resident	Mobile-first flow	receive alert, one-tap approve/deny
Admin	Next.js command center	anomaly monitoring, device visibility, user/access policy

Feature Tour (Judge Script: 4-6 Minutes)

1. Open landing page and read problem statement + trust gauge.
2. Go to /auth, login as admin@sentri.ai.
3. Open /admin and run Simulate to inject a suspicious visitor.
4. Visit /admin/anomalies to show risk classification.
5. Switch to /guard and verify pass scanning flow.
6. Switch to resident role and show one-tap approval model.

Demo Credentials

Role	Email	Password
Admin	admin@sentri.ai	Admin@123
Guard	guard@sentri.ai	Guard@123
Resident	resident@sentri.ai	Resident@123

Tech Stack

Layer	Technology
Frontend	Next.js 16, React 19, TypeScript
State	Zustand
Motion/UX	Framer Motion
Auth (Demo Mode)	Role-based local session model
Security UX	Trust ring, anomaly states, role-gated navigation

Hardware + Cost Disruption

• Edge unit: ESP32-CAM based capture module
• Estimated unit cost: ~₹600
• Goal: bring intelligence-level security to mass housing societies at practical cost

Scalability and Business Model

• Target market: 50,000+ gated societies in India
• SaaS model: per-gate / per-flat recurring subscription
• Expansion path: pilot society -> cluster rollout -> city-wide network graph intelligence

Compliance and Security Posture

• Designed around CERT-In IoT security principles
• Role-based access control for operational boundaries
• Explainable scoring to avoid opaque decisioning

Local Setup

cd SENTRI_WebApp/sentri-app
npm install
npm run dev

Open http://localhost:3000

Production Build

npm run build
npm start

Repository Structure

src/
  app/
    page.tsx                 # Judge-focused landing page
    auth/page.tsx            # Role login/signup
    admin/*                  # Admin command center modules
    guard/page.tsx           # Guard operations and QR verification
    resident/*               # Resident workflows
  components/
    Navbar.tsx               # Top navigation and role-aware UI
    TrustScoreBadge.tsx      # Animated trust score ring
    AuthzGuard.tsx           # Route authorization guard
  lib/
    trustEngine.ts           # Scoring logic
    accessControl.ts         # RBAC matrix
  store/
    sentriStore.ts           # App state and demo auth/session

Team

Built by Team Lazarus.

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If you are a judge: start from the live URL, use the demo credentials, and run the 6-step tour above to evaluate product clarity, technical depth, and commercialization potential.