I'm currently selling a wordpress plugin and now I've decided to give away 15 days trial version of this plugin.
I've created everything which will control the 15 days limitation. The only problem I have is that how can I encrypt the code so that nobody messes with it.
Currently I'm using simple code obfuscation which can be easily decrypted by anyone having good php knowledge.
I want to use more secure encryption like from zend, ioncube etc.. but the problem is that they need loader to be installed in their webhost server.
Since, most of the wordpress users have shared hosting and they are not that technically good, I think it's not that good option to make them load the loader.
What's the solution for securely encrypting my commercial wordpress plugin?