PHP writing encrypted javascript

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I have a question regarding a javascript code renderer made in php .. link

Can anyone help me understand how this guy did to encrypt? every time the obfuscated code is generated it generates different from the previous one even the code being the same

My site is suffering with crawlers, they are accessing my site and stealing information through html .. With the packer (packed) method it is easy to recognize a pattern and capture what you want: pastebin.com/BZEsmxNm .. but with the method of this site damidev.000webhostapp.com leaves everything hidden : pastebin.com/tw90KYSi , thus making life difficult for these crawlers? because if you repair it always generates a different code even with the same input from js .. I was studying and I realized that it is a method in XOR or something ..

    
asked by anonymous 16.10.2018 / 03:22

1 answer

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Generally these systems have an encryption key that is used in a unique way, precisely to not have undo and the goal is to actually make it different with each cycle.

I took a look and it changes the keys to each generation, it should not be difficult to reproduce this in php if you want to generate your own routine.

    
17.10.2018 / 21:05