code: function encryptChunk(data) {
    try {
      var encryptedBytes = this.__key.encrypt(data, 'RSAES-PKCS1-V1_5');
      var encryptedBase64 = btoa(encryptedBytes);
      return encryptedBase64;
    } catch(e) {
      return e;
    }
  }
docs: /*
  Private function that will encrypt the given 100char chunk of data.
  Returns the encrypted string as a base64 encoding or an error object.