I am trying to add software licensing to my software, which I am planning to sell (which means if the license if correct, give access to the software. Else, break the access). I don’t have any servers, so unable to connect to them. I am going to use one of paid online service to sell my software ( I don’t like to use their server support for licensing too, because it is time for me to get some break ). So, I decided to use client side validation. Anyway, I am in a confuse of how to generate the license(the license algorithm) and how to validate it (according to license algorithm). I can do it in my way, but don’t like to mess with this security issue, so decided to take your expertise help. Please tell me/show me/give examples for how to create this License Generator, and Validator. And, if you are posting an example with an algorithm, please be kind enough to explain it if you think it is complex. Because then only I can create one of my own
Apart from that, I am having another doubt. That is, is that is OK to have only 1 license key for an software? So it can be hardcoded to the software without any issue.
Please help..
Actually any protection can be cracked. The question is how much efforts a hacker needs to apply.
Having 1 a hard-coded key probably is the worst solution you can pick as far as the key can be shared easily. The key should be f(system_id) so key-sharing will not work.
Having a hard-coded key validation is not good as well. A hacker will just copy/paste this part of code to a keygen.
Better solution is checking the key on server side as http://activation-cloud.com does. But it is only C++ at the moment.