Try this site, they give a tutorial on encryption.
http://hotwired.lycos.com/webmonkey/programming/php/index.html
Hope it works for you.
> ----------
> From: Danilo Meles[SMTP:[EMAIL PROTECTED]]
> Reply To: Danilo Meles
> Sent: Monday, February 05, 2001 1:41 PM
> To: [EMAIL PROTECTED]
> Subject: [PHP-WIN] Mcrypt
>
> Hi there;
>
> I have to encrypt a string into a cookie, how to do that??? Should a use
> mcrypt function???
>
> If yes how to put this function working in PHP???
>
> Thank you all!!!
>
> Danilo Meles
>
>
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