code: def decrypt_report(self, device_id, root, data, **kwargs):
          
  
          report_key = self._verify_derive_key(device_id, root, **kwargs)
  
          try:
              from Crypto.Cipher import AES
              import Crypto.Util.Counter
          except ImportError:
              raise NotFoundError
  
          ctr = Crypto.Util.Counter.new(128)
  
          # We use AES-128 for encryption
          encryptor = AES.new(bytes(report_key[:16]), AES.MODE_CTR, counter=ctr)
  
          decrypted = encryptor.decrypt(bytes(data))
          return {'data': decrypted}
docs: Decrypt a buffer of report data on behalf of a device.
  
          Args:
              device_id (int): The id of the device that we should encrypt for
              root (int): The root key type that should be used to generate the report
              data (bytearray): The data that we should decrypt
              **kwargs: There are additional specific keyword args that are required
                  depending on the root key used.  Typically, you must specify
                  - report_id (int): The report id
                  - sent_timestamp (int): The sent timestamp of the report
  
                  These two bits of information are used to construct the per report
                  signing and encryption key from the specific root key type.
  
          Returns:
              dict: The decrypted data and any associated metadata about the data.
                  The data itself must always be a bytearray stored under the 'data'
                  key, however additional keys may be present depending on the encryption method
                  used.
  
          Raises:
              NotFoundError: If the auth provider is not able to decrypt the data.