Can any recommend on any script or software for encrypting the variables which are passed through url to another page? That means you encrypt the variable and pass them to a url, where that url page will decrypt the variable.

Thank you.

mcrypt (http://php.net/mcrypt)

Please make sure you mention what language/platform you are working on.

for linux platcorm, i am using php, I have came across mcrypt but find it difficult to understand. Can you help?

Do you have a specific question?

Yeap Im using mcrypt to do exactly that.
I Base64 encode it before the transaction though.