Software Protection-2

Hey there, I developed in a recent project a Java app that ecrypt /decrypt a text and crack a crack the code with a brute force attack. I'm actually learning new VB as I only worked on 6 before, My proposed solution is simple to understand but not to implement: -Create a function that generates randomly 4 characters randomly (they will be saved in numbers form). -Make a database of them. -Create an interface to choose trial key generation or activation key generation. //the previous step (interface) may be skipped and replaced by automatic function to satisfy a big number of orders. -Each time a license is recommended the key is generated : 5 groups of 4 characters (5 lines in the database) will be gathered and separated with "-" . -a Sixth invisible 4 characters are sent with the other 5, so it defines weather it's a trial or activation key. // I have to think about a way to make the difference between them.(Mathematical solution) -When the key is sent to the client it must be encrypted until the arrival and id with the 6th 4 characters. ====> Pretty much that's it , it can be discussed and changed. My price is 300$ for a complete working code. My only demand is time. Your project is welcomed ^^ . I kindly ask you to consider my effort and contact me. My best regards.

My proposal is to use a 16 character key with that can be checked with the luhn algorithm. Even when the Luhn algorithm is not created for hash protection with some slight changes it can work. For example if we use letters and special characters and use the ascii number to validate it it can make the trick. Also if ore security needed we can create a key generator, store some licences on a cloud based database and require the user to be online for the activation of the software. He will be asked to validate the key with the one we have cloud based and if match the licence is activated