Creating a liscense/serial key for plugin

[AlstonA]

I'm working on a plugin for Photoshop cc 2014, I wanted to make a serial code for my extension. The question however is where would I find a method of doing that. I've noticed other programs like MagicPicker is able to do it, so that Is why I am asking the  question.

Anyone with information please post it here. 

[JJMack]

https://www.google.com/search?num=100&newwindow=1&safe=off&rlz=1C1CHFX_enUS546US546&q=protecting+sof...

[AlstonA]

Thanks for the quick reply! I knew about this, but what I am still confused with is how can I make something like this on an html panel that only uses html, css, and javascript?

[matias.kiviniemi]

I would not waste too much effort into it. I mean in the end it can be broken and chances are you'll annoy your paying customers. I think licensing should be just good enough to keep honest people hones. I.e. it should not be possible to just open file, change "payed=true" to get full access but you'd need to download a hacked version. I'm using just license file with license type, expiration date and a signature that is just HMAC with shared secret. The secret can be extracted, but not by 99%

Also pirating is not necessarily an issue if there is a path to converting to paid. I.e. you have to "re-pirate"every time there is a new version  (e.g. every new version has a new key) means that most people (that would pay in anycase) are willing to pay if they actually need it.