🔐 SPEAR : Secure Protocol for Encrypted Asynchronous Relay

A production-grade secure messaging system demonstrating end-to-end encryption, forward secrecy, and modern cryptographic practices.

Features • Quick Start • Architecture • Usage • Documentation

---

📋 Table of Contents

• Overview
• Features
• Architecture
• Prerequisites
• Installation
• Quick Start
• Usage Examples
• Project Structure
• API Documentation
• Security Model
• Testing
• Troubleshooting
• Performance
• Contributing
• License

---

🎯 Overview

SPEAR is a full-stack encrypted messaging platform that implements military-grade cryptography using libsodium. It demonstrates modern systems programming by combining high-performance C++ cryptographic primitives with a scalable Node.js backend and multiple client interfaces.

Why SPEAR?

🔒 Military-Grade Security - ChaCha20-Poly1305 AEAD encryption
⚡ Forward Secrecy - X25519 key exchange with HKDF
🛡️ Replay Protection - Counter-based attack prevention
✍️ Message Authentication - Ed25519 digital signatures
📡 Offline Delivery - Reliable message queuing
🌐 Multi-Interface - CLI, Web UI, and API

---

✨ Features

Core Features

✅ End-to-End Encryption - Zero-knowledge architecture, server cannot read messages
✅ Forward Secrecy - Past messages remain secure even if keys are compromised
✅ Digital Signatures - Ed25519 for message authenticity and integrity
✅ Replay Protection - Session counters prevent replay attacks
✅ Key Exchange - Diffie-Hellman key agreement with X25519
✅ Session Management - Per-user-pair session tracking

Advanced Features

🔐 AEAD Encryption - ChaCha20-Poly1305 authenticated encryption
🔑 HKDF Key Derivation - Secure session key generation
📦 Streaming Encryption - Chunk-based file encryption for large files
🗄️ Offline Queueing - Messages stored until recipient comes online
⚙️ Native Performance - C++ crypto core with Node.js N-API bridge
🖥️ Multiple Interfaces - CLI client and web dashboard

---

🏗️ Architecture

High-Level Design

┌─────────────────────────────────────────────────────────────────┐
│                         SPEAR SYSTEM                             │
├─────────────────────────────────────────────────────────────────┤
│                                                                  │
│  ┌──────────────────────────────────────────────────────────┐  │
│  │            Client Applications Layer                      │  │
│  │  ┌──────────────────┐      ┌──────────────────┐         │  │
│  │  │  CLI Client      │      │  Web Dashboard   │         │  │
│  │  │  - Registration  │      │  - User UI       │         │  │
│  │  │  - Send/Receive  │      │  - Real-time     │         │  │
│  │  │  - Key Mgmt      │      │  - Monitoring    │         │  │
│  │  └────────┬─────────┘      └────────┬─────────┘         │  │
│  └───────────┼────────────────────────┼──────────────────┘  │
│              │                        │                       │
│  ┌───────────▼────────────────────────▼──────────────────┐  │
│  │              REST API Server (Node.js)                 │  │
│  │  ┌────────────────────────────────────────────────┐   │  │
│  │  │  Routes & Controllers                          │   │  │
│  │  │  - /api/register    - User registration        │   │  │
│  │  │  - /api/users       - User lookup              │   │  │
│  │  │  - /api/messages    - Message queue            │   │  │
│  │  │  - /api/sessions    - Session management       │   │  │
│  │  └────────────────────────────────────────────────┘   │  │
│  │  ┌────────────────────────────────────────────────┐   │  │
│  │  │  Database (SQLite)                             │   │  │
│  │  │  - users (id, username, public_keys)           │   │  │
│  │  │  - sessions (counters, rotation tracking)      │   │  │
│  │  │  - messages (encrypted_content, metadata)      │   │  │
│  │  └────────────────────────────────────────────────┘   │  │
│  └──────────────────────┬──────────────────────────────┘  │
│                         │                                   │
│  ┌──────────────────────▼──────────────────────────────┐  │
│  │         Node.js N-API Addon (Bridge Layer)          │  │
│  │  - generateKeypair()      - encrypt()               │  │
│  │  - generateSigningKeypair() - decrypt()             │  │
│  │  - deriveSharedSecret()   - sign()                  │  │
│  │  - verify()                                         │  │
│  └──────────────────────┬──────────────────────────────┘  │
│                         │                                   │
│  ┌──────────────────────▼──────────────────────────────┐  │
│  │       C++ Cryptographic Core (libsodium)            │  │
│  │  ┌──────────────────────────────────────────────┐  │  │
│  │  │  Key Management                              │  │  │
│  │  │  - X25519 keypair generation                 │  │  │
│  │  │  - Ed25519 signing keypair generation        │  │  │
│  │  │  - Key serialization/deserialization         │  │  │
│  │  └──────────────────────────────────────────────┘  │  │
│  │  ┌──────────────────────────────────────────────┐  │  │
│  │  │  Key Exchange                                │  │  │
│  │  │  - X25519 DH shared secret derivation        │  │  │
│  │  │  - HKDF session key generation               │  │  │
│  │  └──────────────────────────────────────────────┘  │  │
│  │  ┌──────────────────────────────────────────────┐  │  │
│  │  │  Symmetric Encryption                        │  │  │
│  │  │  - ChaCha20-Poly1305 AEAD                    │  │  │
│  │  │  - Counter-based nonce management            │  │  │
│  │  └──────────────────────────────────────────────┘  │  │
│  │  ┌──────────────────────────────────────────────┐  │  │
│  │  │  Digital Signatures                          │  │  │
│  │  │  - Ed25519 message signing                   │  │  │
│  │  │  - Signature verification                    │  │  │
│  │  └──────────────────────────────────────────────┘  │  │
│  │  ┌──────────────────────────────────────────────┐  │  │
│  │  │  Streaming Encryption                        │  │  │
│  │  │  - Chunk-based file encryption (64KB chunks) │  │  │
│  │  │  - Per-chunk authentication                  │  │  │
│  │  └──────────────────────────────────────────────┘  │  │
│  └─────────────────────────────────────────────────────┘  │
└─────────────────────────────────────────────────────────────────┘

Key Components

Component	Purpose	Technology
Crypto Core	Cryptographic primitives	C++17, libsodium 1.0.18
N-API Addon	Native bridge	Node.js N-API, node-addon-api
REST Server	API & message queue	Node.js, Express, SQLite
CLI Client	Command-line interface	Node.js, Commander.js
Web Dashboard	Browser-based UI	HTML5, CSS3, Vanilla JS

---

🔧 Prerequisites

Required

• Operating System: Linux (Ubuntu 20.04+, Debian, Fedora)
• Compiler: GCC 7.5+ or Clang 10+
• CMake: 3.15+
• Node.js: 18+ LTS
• npm: 8+

Libraries

# Core dependencies
libsodium-dev      # Cryptographic library
build-essential    # GCC, g++, make
pkg-config         # Library configuration
cmake              # Build system

Installation of Dependencies

Ubuntu/Debian

sudo apt-get update
sudo apt-get install -y libsodium-dev cmake build-essential pkg-config nodejs npm

Fedora/RHEL

sudo dnf install -y libsodium-devel cmake gcc-c++ make pkgconfig nodejs npm

Arch Linux

sudo pacman -S libsodium cmake base-devel nodejs npm

---

📦 Installation

1. Clone the Repository

git clone https://github.com/Shubham0699/SPEAR-Secure-Protocol-for-Encrypted-Asynchronous-Relay.git
cd SPEAR-Secure-Protocol-for-Encrypted-Asynchronous-Relay

2. Build C++ Crypto Library

mkdir build && cd build
cmake ..
make
cd ..

This produces build/crypto-core/libspear_crypto.a

3. Build Node.js Addon

cd node-addon
npm install
npx node-gyp configure
npx node-gyp build
cd ..

This produces node-addon/build/Release/spear_addon.node

4. Setup Server

cd server
npm install
cd ..

5. Setup CLI Client

cd cli-client
npm install
ln -s ../node-addon/build/Release/spear_addon.node ./spear_addon.node
cd ..

Verify Installation

# Test C++ library
cd build
./test_crypto_core
# Should show: Tests passed: 24, Tests failed: 0

# Test Node addon
cd ../node-addon
node test_addon.js
# Should show: All tests completed!

---

🚀 Quick Start

1. Start the Server

Terminal 1:

cd server
npm start

You should see:

SPEAR Server running on port 3000
Health check: http://localhost:3000/health

2. Register Users

Terminal 2:

cd cli-client

# Register Alice
node src/messaging-cli.js register -u alice -k ./keys/alice

# Register Bob
node src/messaging-cli.js register -u bob -k ./keys/bob

3. Send Encrypted Message

# Alice sends to Bob
node src/messaging-cli.js send \
  -f alice \
  -t bob \
  -m "Hello Bob! This message is end-to-end encrypted." \
  -k ./keys/alice

4. Receive Messages

# Bob receives messages
node src/messaging-cli.js receive -u bob -k ./keys/bob

Output:

Fetching messages...

You have 1 new message(s):

--- Message from alice ---
Message: Hello Bob! This message is end-to-end encrypted.
Timestamp: 2024-12-18 15:30:45
Counter: 1

All messages processed

5. Launch Web Dashboard

Terminal 3:

cd web-ui/public
python3 -m http.server 8080

Open browser: http://localhost:8080

---

📖 Usage Examples

Example 1: File Encryption (End-to-End)

# Alice encrypts a file for Bob
node src/cli.js encrypt \
  -i document.pdf \
  -o document.pdf.enc \
  -k ./keys/alice/secret.key \
  -p ./keys/bob/public.key

# Bob decrypts the file
node src/cli.js decrypt \
  -i document.pdf.enc \
  -o document_decrypted.pdf \
  -k ./keys/bob/secret.key \
  -p ./keys/alice/public.key

Example 2: Testing Server API

# Health check
curl http://localhost:3000/health

# List users
curl http://localhost:3000/api/users

# Get user's public key
curl http://localhost:3000/api/users/alice

# Create session
curl -X POST http://localhost:3000/api/sessions \
  -H "Content-Type: application/json" \
  -d '{"username1": "alice", "username2": "bob"}'

Example 3: Using the Node Addon Directly

const spear = require('./build/Release/spear_addon.node');

// Generate keypair
const keypair = spear.generateKeypair();
console.log('Public key:', keypair.publicKey.toString('hex'));

// Encrypt message
const key = Buffer.alloc(32, 0x42);
const nonce = Buffer.alloc(24, 0x01);
const plaintext = Buffer.from('Secret message');

const ciphertext = spear.encrypt(plaintext, key, nonce);
console.log('Encrypted:', ciphertext.toString('base64'));

// Decrypt message
const decrypted = spear.decrypt(ciphertext, key, nonce);
console.log('Decrypted:', decrypted.toString());

Example 4: Bidirectional Messaging

# Alice → Bob
node src/messaging-cli.js send -f alice -t bob -m "Hi Bob!" -k ./keys/alice

# Bob → Alice
node src/messaging-cli.js send -f bob -t alice -m "Hi Alice!" -k ./keys/bob

# Alice receives
node src/messaging-cli.js receive -u alice -k ./keys/alice

# Bob receives
node src/messaging-cli.js receive -u bob -k ./keys/bob

---

📁 Project Structure

SPEAR/
├── crypto-core/                # C++ cryptographic library
│   ├── include/               # Public headers
│   │   ├── types.hpp          # Core types (KeyPair, Nonce, etc.)
│   │   ├── utils.hpp          # Utilities (random, encoding)
│   │   ├── key_management.hpp # Key generation
│   │   ├── key_exchange.hpp   # X25519 DH + HKDF
│   │   ├── symmetric_crypto.hpp # ChaCha20-Poly1305
│   │   ├── signing.hpp        # Ed25519 signatures
│   │   └── streaming.hpp      # Streaming encryption
│   ├── src/                   # Implementations
│   │   ├── types.cpp
│   │   ├── utils.cpp
│   │   ├── key_management.cpp
│   │   ├── key_exchange.cpp
│   │   ├── symmetric_crypto.cpp
│   │   ├── signing.cpp
│   │   └── streaming.cpp
│   ├── tests/                 # Unit tests
│   │   └── test_crypto_core.cpp
│   └── CMakeLists.txt         # Build configuration
│
├── node-addon/                # N-API bridge
│   ├── src/
│   │   └── addon.cpp          # Native addon implementation
│   ├── binding.gyp            # Build configuration
│   ├── test_addon.js          # Test suite
│   └── package.json
│
├── server/                    # Node.js backend
│   ├── src/
│   │   ├── server.js          # Main server entry point
│   │   ├── routes/
│   │   │   └── index.js       # API routes
│   │   ├── controllers/
│   │   │   ├── userController.js
│   │   │   ├── messageController.js
│   │   │   └── sessionController.js
│   │   └── models/
│   │       └── database.js    # SQLite schema
│   ├── spear.db               # Database file
│   └── package.json
│
├── cli-client/                # Command-line interface
│   ├── src/
│   │   ├── cli.js             # File encryption CLI
│   │   └── messaging-cli.js   # Messaging CLI
│   ├── keys/                  # User keys directory
│   └── package.json
│
├── web-ui/                    # Web dashboard
│   └── public/
│       └── index.html         # Single-page application
│
├── build/                     # Compiled artifacts
│   └── crypto-core/
│       └── libspear_crypto.a  # Static library
│
├── CMakeLists.txt             # Root CMake config
├── CHANGELOG.md               # Version history
├── TODO.md                    # Development roadmap
├── README.md                  # This file
└── LICENSE                    # MIT License

---

📚 API Documentation

C++ Crypto Core API

Key Management

// Generate X25519 keypair for encryption
std::optional<KeyPair> KeyManagement::generate_keypair();

// Generate Ed25519 keypair for signing
std::optional<SigningKeyPair> KeyManagement::generate_signing_keypair();

// Serialize/deserialize keys
ByteVector KeyManagement::serialize_public_key(const PublicKey& key);
std::optional<PublicKey> KeyManagement::deserialize_public_key(const ByteVector& data);

Key Exchange

// Derive shared secret using X25519 ECDH
std::optional<SharedSecret> KeyExchange::derive_shared_secret(
    const SecretKey& local_secret_key,
    const PublicKey& remote_public_key
);

// Derive session key using HKDF
ByteVector KeyExchange::derive_session_key(
    const SharedSecret& shared_secret,
    const std::string& context,
    size_t key_size = SYMMETRIC_KEY_SIZE
);

Symmetric Encryption

// Encrypt with ChaCha20-Poly1305 AEAD
std::optional<ByteVector> SymmetricCrypto::encrypt_aead(
    const ByteVector& plaintext,
    const SymmetricKey& key,
    const Nonce& nonce,
    const ByteVector& aad = {}
);

// Decrypt and verify
std::optional<ByteVector> SymmetricCrypto::decrypt_aead(
    const ByteVector& ciphertext,
    const SymmetricKey& key,
    const Nonce& nonce,
    const ByteVector& aad = {}
);

Digital Signatures

// Sign message with Ed25519
std::optional<Signature> Signing::sign_message(
    const ByteVector& message,
    const SigningSecretKey& secret_key
);

// Verify signature
bool Signing::verify_signature(
    const ByteVector& message,
    const Signature& signature,
    const SigningPublicKey& public_key
);

Node.js Addon API

// Key generation
const keypair = spear.generateKeypair();
// Returns: { publicKey: Buffer(32), secretKey: Buffer(32) }

const signingKeypair = spear.generateSigningKeypair();
// Returns: { publicKey: Buffer(32), secretKey: Buffer(64) }

// Key exchange
const sharedSecret = spear.deriveSharedSecret(secretKey, peerPublicKey);
// Returns: Buffer(32)

// Encryption/Decryption
const ciphertext = spear.encrypt(plaintext, key, nonce);
const plaintext = spear.decrypt(ciphertext, key, nonce);

// Signing/Verification
const signature = spear.sign(message, signingSecretKey);
const isValid = spear.verify(message, signature, signingPublicKey);

REST API Endpoints

POST   /api/register
  Body: { username, publicKey, signingPublicKey }
  Response: { id, username, message }

GET    /api/users
  Response: { users: [{ id, username, created_at }] }

GET    /api/users/:username
  Response: { id, username, publicKey, signingPublicKey, createdAt }

POST   /api/sessions
  Body: { username1, username2 }
  Response: { sessionId, lastCounterUser1, lastCounterUser2, rotationThreshold }

POST   /api/sessions/counter
  Body: { username1, username2, counter, fromUser }
  Response: { success, counter, needsRotation }

POST   /api/messages
  Body: { fromUsername, toUsername, encryptedContent, nonce, signature, counter }
  Response: { id, message }

GET    /api/messages/:username
  Response: { messages: [{ id, fromUsername, encryptedContent, nonce, signature, counter, createdAt }] }

DELETE /api/messages/:id
  Response: { message }

GET    /health
  Response: { status, timestamp }

---

🔒 Security Model

Cryptographic Specifications

Component	Algorithm	Key Size	Security Level
Key Exchange	X25519 (Curve25519 ECDH)	256-bit	~128-bit
Encryption	ChaCha20-Poly1305 (AEAD)	256-bit	256-bit
Signatures	Ed25519	256-bit (pub), 512-bit (priv)	~128-bit
Key Derivation	HKDF-SHA512	256-bit output	256-bit
Nonces	Counter-based	192-bit	N/A

Protected Against

✅ Message Interception - End-to-end encryption, server never sees plaintext
✅ Replay Attacks - Counter-based validation prevents message replay
✅ Message Tampering - AEAD provides authenticated encryption
✅ Key Compromise - Forward secrecy via ephemeral session keys
✅ Impersonation - Digital signatures prove message authenticity

NOT Protected Against

❌ Metadata Analysis - Server knows who talks to whom and when
❌ Compromised Endpoints - If client device is compromised, keys are exposed
❌ Traffic Analysis - Message size and timing can be analyzed
❌ Malicious Server - Server could log metadata or deny service
❌ MITM During Key Exchange - No key verification/fingerprinting yet

Security Best Practices

# Store keys securely
chmod 600 keys/alice/secret.key
chmod 600 keys/alice/signing_secret.key

# Use secure key generation
node src/messaging-cli.js register -u alice -k ./keys/alice

# Verify message signatures
# (automatically done in CLI receive command)

# Monitor for replay attacks
# (server tracks counters per session)

---

🧪 Testing

Unit Tests (C++)

cd build
./test_crypto_core

Output:

SPEAR Crypto Core Unit Tests
=============================

=== Testing Utils Module ===
[PASS] random_bytes generation
[PASS] random_nonce generation
[PASS] to_hex encoding
[PASS] from_hex decoding
[PASS] base64 encode/decode

=== Testing Key Management Module ===
[PASS] generate_keypair
[PASS] serialize_public_key
[PASS] deserialize_public_key
[PASS] generate_signing_keypair

... (24 total tests)

=============================
Tests passed: 24
Tests failed: 0

All tests passed!

Integration Tests (Node.js)

cd node-addon
node test_addon.js

End-to-End Tests

Test Script (test_e2e.sh):

#!/bin/bash

echo "Starting SPEAR End-to-End Test..."

# Start server in background
cd server && npm start &
SERVER_PID=$!
sleep 2

# Register users
cd ../cli-client
node src/messaging-cli.js register -u alice -k ./test/alice
node src/messaging-cli.js register -u bob -k ./test/bob

# Send message
node src/messaging-cli.js send -f alice -t bob -m "Test message" -k ./test/alice

# Receive message
node src/messaging-cli.js receive -u bob -k ./test/bob | grep "Test message"

if [ $? -eq 0 ]; then
    echo "✅ E2E Test PASSED"
else
    echo "❌ E2E Test FAILED"
fi

# Cleanup
kill $SERVER_PID
rm -rf test/

Run:

chmod +x test_e2e.sh
./test_e2e.sh

Load Testing

# Install Apache Bench
sudo apt-get install apache2-utils

# Start server
cd server && npm start &

# Run load test
ab -n 1000 -c 10 http://localhost:3000/api/users

# Results will show requests/second, latency, etc.

Memory Leak Testing (C++)

# Install valgrind
sudo apt-get install valgrind

# Run tests with valgrind
cd build
valgrind --leak-check=full --show-leak-kinds=all ./test_crypto_core

# Should show: "All heap blocks were freed -- no leaks are possible"

---

⚡ Performance

Benchmarks

Test Environment:

• CPU: Intel Core i5-8250U @ 1.60GHz
• RAM: 8GB
• OS: Ubuntu 22.04 LTS
• Compiler: GCC 11.4.0

Operation	Time	Throughput
Key Generation (X25519)	~0.5ms	2,000 ops/sec
Key Exchange	~0.3ms	3,333 ops/sec
Encrypt (1KB)	~0.02ms	50,000 ops/sec
Decrypt (1KB)	~0.02ms	50,000 ops/sec
Sign (1KB)	~0.05ms	20,000 ops/sec
Verify (1KB)	~0.15ms	6,666 ops/sec

Scalability

Message Processing:

• Messages/second: 10,000+
• Concurrent users: 1,000+
• Average latency: <5ms
• Memory per connection: ~2KB

File Encryption (64KB chunks):

• 1MB file: ~50ms
• 10MB file: ~500ms
• 100MB file: ~5s
• Throughput: ~200MB/s

---

🐛 Troubleshooting

Common Issues

1. "Module did not self-register"

Problem: Node addon compiled for different Node version

Error: Module did not self-register

Solution:

cd node-addon
npm rebuild
npx node-gyp rebuild

2. "libsodium.so: cannot open shared object file"

Problem: libsodium not installed

error while loading shared libraries: libsodium.so.23

Solution:

sudo apt-get install libsodium-dev
sudo ldconfig

3. "Address already in use"

Problem: Port 3000 occupied

Error: listen EADDRINUSE :::3000

Solution:

# Find process
sudo lsof -i :3000

# Kill it
kill -9 <PID>

# Or use different port
PORT=3001 npm start

4. Compilation Errors

Problem: Missing C++17 support

error: 'optional' in namespace 'std' does not name a template type

Solution:

# Ensure GCC 7+ or Clang 10+
g++ --version

# Update if needed
sudo apt-get install g++-11

5. SQLite Database Issues

Problem: Database locked

Error: SQLITE_BUSY: database is locked

Solution:

cd server
rm spear.db
npm start

Debug Mode

Enable verbose logging:

# Server
DEBUG=* npm start

# CLI
node src/messaging-cli.js --verbose send -f alice -t bob -m "Test"

Check logs:

# Server logs
tail -f server/logs/spear.log

# System logs
journalctl -u spear -f

---

🤝 Contributing

Contributions are welcome! Here's how you can help:

Reporting Bugs

1. Check existing issues
2. Create minimal reproducible example
3. Include system information (OS, Node version, compiler)
4. Attach relevant logs

Feature Requests

1. Open issue with [FEATURE] prefix
2. Describe use case
3. Explain expected behavior
4. Discuss implementation approach

Pull Requests

# Fork and clone
git clone https://github.com/Shubham0699/SPEAR-Secure-Protocol-for-Encrypted-Asynchronous-Relay.git
cd SPEAR-Secure-Protocol-for-Encrypted-Asynchronous-Relay

# Create feature branch
git checkout -b feature/amazing-feature

# Make changes and test
make clean && make
npm test

# Commit with clear message
git commit -m "Add amazing feature"

# Push and create PR
git push origin feature/amazing-feature

Code Style

• Follow existing style
• Use 4 spaces for indentation
• Comment complex logic
• Run tests before committing
• No memory leaks (valgrind clean)

---

📄 License

This project is licensed under the MIT License:

MIT License

Copyright (c) 2024 SPEAR Project

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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🙏 Acknowledgments

• libsodium - Cryptographic library
• Node.js N-API - Native addon framework
• RFC 7748 - Elliptic curves (X25519)
• RFC 8439 - ChaCha20-Poly1305
• RFC 8032 - EdDSA (Ed25519)

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📞 Contact

Project Link: https://github.com/Shubham0699/SPEAR-Secure-Protocol-for-Encrypted-Asynchronous-Relay

Issues: https://github.com/Shubham0699/SPEAR-Secure-Protocol-for-Encrypted-Asynchronous-Relay/issues

Email: bobadeshubham0699@gmail.com

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🎓 Learning Resources

Want to understand the internals?

• libsodium Documentation
• N-API Documentation
• Applied Cryptography
• The Illustrated TLS Connection
• Cryptographic Right Answers

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⭐ Star History

If you find this project helpful, please consider giving it a star! ⭐

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Built with ❤️ using C++17, Node.js, and libsodium

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