def decrypt(self,<EOL>data,<EOL>unique_identifier=None,<EOL>cryptographic_parameters=None,<EOL>iv_counter_nonce=None,<EOL>credential=None):
operation = Operation(OperationEnum.DECRYPT)<EOL>request_payload = payloads.DecryptRequestPayload(<EOL>unique_identifier=unique_identifier,<EOL>data=data,<EOL>cryptographic_parameters=cryptographic_parameters,<EOL>iv_counter_nonce=iv_counter_nonce<EOL>)<EOL>batch_item = messages.RequestBatchItem(<EOL>operation=operation,<EOL>request_payload=request_payload<EOL>)<EOL>request = self._build_request_message(credential, [batch_item])<EOL>response = self._send_and_receive_message(request)<EOL>batch_item = response.batch_items[<NUM_LIT:0>]<EOL>payload = batch_item.response_payload<EOL>result = {}<EOL>if payload:<EOL><INDENT>result['<STR_LIT>'] = payload.unique_identifier<EOL>result['<STR_LIT:data>'] = payload.data<EOL><DEDENT>result['<STR_LIT>'] = batch_item.result_status.value<EOL>try:<EOL><INDENT>result['<STR_LIT>'] = batch_item.result_reason.value<EOL><DEDENT>except Exception:<EOL><INDENT>result['<STR_LIT>'] = batch_item.result_reason<EOL><DEDENT>try:<EOL><INDENT>result['<STR_LIT>'] = batch_item.result_message.value<EOL><DEDENT>except Exception:<EOL><INDENT>result['<STR_LIT>'] = batch_item.result_message<EOL><DEDENT>return result<EOL>
Decrypt data using the specified decryption key and parameters.

Args:
    data (bytes): The bytes to decrypt. Required.
    unique_identifier (string): The unique ID of the decryption key
        to use. Optional, defaults to None.
    cryptographic_parameters (CryptographicParameters): A structure
        containing various cryptographic settings to be used for the
        decryption. Optional, defaults to None.
    iv_counter_nonce (bytes): The bytes to use for the IV/counter/
        nonce, if needed by the decryption algorithm and/or cipher
        mode. Optional, defaults to None.
    credential (Credential): A credential object containing a set of
        authorization parameters for the operation. Optional, defaults
        to None.

Returns:
    dict: The results of the decrypt operation, containing the
        following key/value pairs:

        Key                 | Value
        --------------------|-----------------------------------------
        'unique_identifier' | (string) The unique ID of the decryption
                            | key used to decrypt the data.
        'data'              | (bytes) The decrypted data.
        'result_status'     | (ResultStatus) An enumeration indicating
                            | the status of the operation result.
        'result_reason'     | (ResultReason) An enumeration providing
                            | context for the result status.
        'result_message'    | (string) A message providing additional
                            | context for the operation result.