OTP-Based Check-in System
Objective
To design a secure and paperless check-in system where attendees/visitors confirm their identity using a One-Time Password (OTP) sent to their registered email or mobile number during entry at events, offices, exams, or hostels.
Key Features
| Module | Feature |
|---|---|
| User Registration | Pre-register using email/phone, enter personal details |
| OTP Generation | System generates unique OTP during check-in request |
| OTP Delivery | OTP sent via Email/SMS/WhatsApp |
| Check-in Validation | User enters OTP at kiosk/device → system validates |
| Admin Dashboard | Track check-ins, attendance logs, late arrivals |
| QR Code (Optional) | Generate QR code with OTP embedded for faster check-in |
| Notifications | Confirmation SMS/email on successful check-in |
| Multi-Device Support | Kiosk, mobile app, or web-based check-in |
| Security Logs | Track failed OTP attempts, suspicious activity |
| Role Management | Admin/Staff manage attendees, validate entries |
Technology Stack
| Layer | Technology Options |
|---|---|
| Frontend | HTML, CSS, Bootstrap, React / Vue / Angular |
| Backend | Node.js (Express) / Spring Boot / Django |
| Database | MySQL / PostgreSQL / MongoDB |
| OTP Service | Twilio / AWS SNS / Firebase / Nodemailer |
| Authentication | JWT / OAuth2 for staff login |
| Hosting | AWS / Azure / Heroku / Railway |
Workflow
1. Registration
-
User pre-registers with Name, ID, Email, Mobile.
-
Record stored in DB.
2. Check-in Request
-
At check-in counter → user provides mobile/email.
-
System generates random OTP (e.g., 6-digit numeric).
3. OTP Delivery
-
OTP sent via SMS/Email/WhatsApp.
-
OTP valid for X minutes (e.g., 5 mins).
4. Validation
-
User enters OTP at kiosk/web.
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System verifies OTP from DB/cache.
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On success → Check-in confirmed, time logged.
5. Admin Monitoring
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Admin can see:
-
List of checked-in users
-
Failed OTP attempts
-
Late arrivals
-
User Roles
| Role | Permissions |
|---|---|
| Visitor/User | Register & check-in using OTP |
| Staff | Assist with OTP verification at kiosks |
| Admin | Manage registrations, monitor logs, export reports |
Security Features
-
Time-bound OTP (expires after X minutes)
-
Hashing OTP before storing in DB
-
Rate limiting for OTP resend requests
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IP/device tracking for fraud prevention
-
Role-based access for staff/admin
Analytics (Admin Dashboard)
| Metric | Description |
|---|---|
| Total Check-ins | No. of attendees successfully checked-in |
| Pending / Failed Attempts | No. of OTP mismatches or expired OTPs |
| Peak Hours | High traffic check-in times |
| User Logs | Who checked-in, when, from which device |
| Export Reports | Attendance data in Excel/PDF |
What You Get
OTP generation + validation system
Paperless & secure check-in process
Attendance & entry log management
Admin dashboard with analytics
Email/SMS integration with Twilio/Nodemailer
Scalable for college fests, offices, exams, hostels, or events
Why Choose This Project?
This project showcases real-world implementation of OTP-based authentication and secure attendance systems. It integrates backend APIs, OTP services, and real-time validation, making it an industry-relevant project for learning security + event management systems.