Sealed Secrets.js Tutorial Series

Master secure communication by encrypting secrets using Sealed Secrets.js in a practical, step-by-step manner

1. Project Setup

Initialize a new project and install the Sealed Secrets.js library

Install via npm:


npm init -y
npm install sealed-secrets.js

Project structure:

sealed-secrets-tutorial/ 

├── index.js
├── secrets.js
└── package.json

2. Basic Encryption

Create your first encrypted message

Lock Icon

JavaScript example:


const SealedSecrets = require('sealed-secrets.js');

// Generate a 256-bit master key
const masterKey = SealedSecrets.generateKey(256);

// Encrypt a test message
const encrypted = SealedSecrets.encrypt(
  masterKey,
  'This is my secure message'
);

console.log('Encrypted:', encrypted);

3. Decryption

Verify encrypted messages in your project

Key Icon 

// Decrypt your message
const decrypted = SealedSecrets.decrypt(
  encrypted,
  masterKey
);

console.log('Decrypted:', decrypted); 
// Should match original message exactly

⚠️ Never lose your master key - without it, your data is forever unrecoverable!

4. Key Management

Properly store and rotate your encryption keys

Best Practices

  • Use AWS KMS or Vault for key storage
  • Rotate keys every 90 days
  • Enable audit logging

Security Tips

  • Never commit keys to source control
  • Limit key access
  • Test encrypted/decrypted flow

Key rotation example:


const newKey = SealedSecrets.rotateKey(
  currentKey,
  'new_master_key_name'
);

SealedSecrets.updateKey(
  'my_secrets',
  newKey
);

5. Complete Your Tutorial

Security Verification

This script will:

  • Create a unique encryption key
  • Encrypt/decrypt data
  • Store key securely
  • Demonstrate safe practices