254049 Encrypting Proxy URL's

Hello, Please see my proxy here: [login to view URL] and click submit / browse to a website. We use base64 encryption, which well, its not really "encryption" in terms of security since anyone can decode it very easily. I would like to encrypt the URL using another encryption. Please see this site: [login to view URL] or [login to view URL] as they seem to use stronger encryption. The job will involve customizing PHProxy to use a stronger encryption method, such as the ones which empower the two example sites. Thanks