This is a cryptographic application. Information security couldn't be underestimated in our today's world and will become more and more critical in the days ahead. Cryptography is one of the key technologies in achieving it. Constantly growing computational capabilities are imposing more and more strict requirements on cryptography standards, which are the objects constant study and analysis.
This application is solving DES Challenge problem. More on DES algorithm and its noticeable history as encryption standard, you can find here. We note that private data are not used for our tests!