A method, comprising: obtaining, at a trustworthy party, a data processing result from a requesting party or a processing party in response to receiving a request for verifying correctness of the data processing result from the requesting party, wherein the data processing result is obtained by the requesting party from the processing party; obtaining, at a trustworthy party, the data used to getting the data processing result and a corresponding algorithm from the processing party, wherein the processing party uses the corresponding algorithm to process the data and gets the data processing result; processing, at the trustworthy party, the obtained data with the corresponding algorithm and comparing the processed result with the received data processing result, and if the two results are the same, the data processing result verified by the trustworthy party is correct.