BlokNet

// Пример кода на Node.js
// Connect the built-in 'crypto' module
const crypto = require('crypto');

// The key and IV must be protected
const key = crypto.randomBytes(32); // 256 бит
const iv  = crypto.randomBytes(16); // 128 бит

function encrypt(text) {
  let cipher = crypto.createCipheriv('aes-256-cbc', key, iv);
  let encrypted = cipher.update(text, 'utf8', 'hex');
  encrypted += cipher.final('hex');
  return encrypted;
}

function decrypt(encryptedText) {
  let decipher = crypto.createDecipheriv('aes-256-cbc', key, iv);
  let decrypted = decipher.update(encryptedText, 'hex', 'utf8');
  decrypted += decipher.final('utf8');
  return decrypted;
}