Codeigniter Encryption in Apache vs IIS

[eluser]josen[/eluser]
[quote author="WanWizard" date="1283360678"]The encryption library uses PHP's mcrypt library if available.

If you old platform had this library installed, but the new one doesn't, you have a problem, as the encryption results between the two are different.
Make sure both PHP installations have the same libraries available.

That might be annoying to you, but it's your responsability that the platforms are equal.
You don't expect things to "just work" if you move from one environment to another without checking the prerequisites do you?[/quote]

Yes I guess you are right.

You know, it's actually more worrying than annoying.
My biggest concern is that the same mcrypt library might behave differently on different server environments that I won't be able to decode my data at all.

WanWizard, if I may ask further, do you use the encryption method from Codeigniter or something else?

Thank you so much for the help.