Problem with Encrypt Library and random results

[eluser]Skinnpenal[/eluser]
Hi!

I'm using the CI Encrypt Library for an encryption that I need to be two-way, and I don't have mcrypt available, so I'm using the "fall back" method of the library.

The problem is that I need the encrypted string to be the same everytime it encrypts the same content.

So, if I encrypt "foo" 3 times, it will give 3 different results, while I need it to be the same.

Are there any ways of achieving this?

[eluser]renownedmedia[/eluser]
Maybe use a different two-way encryption?

PGP: http://www.phpclasses.org/browse/package/378.html