An electronic device is provided. The electronic device includes a memory configured to store an application and first unique information of the application, and at least one processor operatively connected with the memory. The at least one processor is configured to divide code of the application into a plurality of segments, select at least one segment among the plurality of segments, create second unique information in relation to the at least one segment, compare the first unique information and the second unique information, and determine whether the code of the application has been tampered with, based on a result of the comparison of the first unique information and the second unique information.