<!-- BEGIN COPY / PASTE -->
    // Example of encrypting data before storing in localStorage
    const sensitiveData = "userSecret";
    const encryptedData = btoa(sensitiveData); // Simple Base64 encoding
    localStorage.setItem('secureData', encryptedData);

    // To retrieve and decrypt
    const retrievedData = localStorage.getItem('secureData');
    const decryptedData = atob(retrievedData);
    console.log(decryptedData); // Outputs: userSecret
    <!-- END COPY / PASTE -->