On 13 May 2002, Udo Giacomozzi wrote:
> If the whole thing is designed the right way. 
> A copy protection I like for example are dongles. Ok, they are not 
> applicable to PHP and aren't 100% secure either [don't want to start a 
> discussion about this now]. But this system makes no problems for the 
> people that have the dongle.
> 
> That was why first came up with this question. As a PHP beginner I wanted 
> to know if there are elegant ways to make a acceptable copy protection.
> 
> There seem to be only 3 possibilities:
> - zend encoder
> - a code obfuscator like POBS
> - encrypting the source code and then decrypting it in realtime

All of these have weaknesses. And therefore the whole exercise is moot. It 
only takes one person with some free time to break your protection 
scheme, and then the cat's out of the bag. Once it has been broken, it 
will spread and then it won't matter how complex your scheme was.

I really doubt there is any software out there that isn't being traded by 
high-school kids, even if they have no idea what it's for. The only 
exceptions would be something so arcane and obscure that nobody ever had 
an interest in cracking it.

miguel


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