CertVerifySystem

Stop fake or altered course certificates from being accepted as genuine.
CertVerifySystem digitally signs every certificate issued by the Society and provides a public verification flow so anyone can independently validate authenticity.

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🚀 Overview

In internship hiring and developer program applications, certificate fraud can happen through:

• edited certificate details,
• fabricated certificate files,
• reused certificates from other people.

CertVerifySystem addresses this by:

1. generating certificates with tamper-evident digital signatures,
2. storing/verifying trusted signature metadata,
3. exposing a verification interface for recruiters, reviewers, and admins.

If a certificate is modified after issuance, verification fails.

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✨ Core Features

• Digital certificate signing at issuance time
• Independent verification without trusting screenshots alone
• Tamper detection for edited/forged certificates
• Issuer-backed trust model for Society-issued credentials
• Web-based verification interface for easy checking
• Backend services for signing, retrieval, and validation workflows

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🧱 Tech Stack

Based on repository language composition:

• C# (48.6%) – primary backend/services logic
• JavaScript (27.2%) – frontend behavior and UI interactions
• CSS (14.3%) – styling
• Go (7.0%) – supporting services/utilities
• PowerShell (2.3%) – scripts/automation
• Dockerfile – containerization support

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🏗️ High-Level Architecture

[Certificate Issuer/Admin]
          |
          v
  [Signing Service]
          |
          v
[Issued Certificate + Signature/Proof]
          |
          v
 [Verification Portal/API] <---- [Recruiter/Verifier]
          |
          v
 [Valid / Invalid / Not Found result]

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🔐 Verification Model (Conceptual)

Each certificate is tied to verifiable data (for example: certificate ID, recipient, course, issue date) and a digital signature produced using the issuer’s private key.

Verification:

1. extracts certificate data and provided proof/signature,
2. recomputes/normalizes the signed payload,
3. validates signature using the trusted public key,
4. returns authenticity status.

Any post-issuance modification should invalidate the signature.

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📁 Suggested Repository Structure

Update this section to match your exact folders.

CertVerifySystem/
├─ backend/                # C# APIs/services
├─ frontend/               # JS/CSS web app
├─ verifier/               # verification logic/services
├─ scripts/                # PowerShell automation
├─ deployments/            # Docker and infra configs
└─ README.md

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⚙️ Getting Started

The exact commands depend on your folder structure.
Replace placeholders below with your real project paths.

1) Clone the repository

git clone https://github.com/Krishmal2004/CertVerifySystem.git
cd CertVerifySystem

2) Configure environment

Create environment files (example):

cp .env.example .env

Typical variables you may need:

• signing key/private key path (or key vault reference),
• verification public key path,
• database/storage connection strings,
• API base URLs and ports.

3) Run backend (C#)

dotnet restore
dotnet build
dotnet run

4) Run frontend (JavaScript)

npm install
npm run dev

5) (Optional) Run with Docker

docker compose up --build

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🧪 Testing

Recommended test categories:

• signature generation correctness,
• signature verification (valid certificate),
• tampered certificate rejection,
• wrong public key rejection,
• expired/revoked (if implemented),
• API integration and UI flow tests.

Example commands:

dotnet test
npm test

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📡 API (Example Contract)

Replace with your real endpoints.

Verify certificate

POST /api/certificates/verify

Request body

{
  "certificateId": "CERT-2026-000123",
  "certificateData": "...",
  "signature": "base64-signature"
}

Response

{
  "status": "valid",
  "message": "Certificate is authentic and untampered."
}

Possible status values:

• valid
• invalid
• not_found
• error

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👥 User Roles

• Issuer/Admin: issues and signs certificates
• Candidate: shares certificate/proof
• Verifier (Recruiter/Reviewer): validates authenticity through system tools

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🔒 Security Notes

• Never commit private keys to the repository.
• Use secure key storage (KMS/HSM/vault) in production.
• Rotate keys with a planned migration strategy.
• Log verification attempts for auditability.
• Protect verification APIs with rate limiting and monitoring.

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🛣️ Roadmap Ideas

• QR-based one-click verification links
• certificate revocation registry
• timestamping with trusted authority
• downloadable signed metadata (JSON proof bundle)
• recruiter-friendly verification dashboard
• webhook integrations for application platforms

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🤝 Contributing

Contributions are welcome.

1. Fork the repo
2. Create a feature branch
3. Commit changes
4. Open a pull request with clear context and test evidence

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📄 License

Add your license here (e.g., MIT, Apache-2.0, or proprietary internal license).

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🙌 Acknowledgment

Built to strengthen trust in technical certification during internship and developer hiring workflows.