Web to Salesforce Verfiy

Please quote the following, to be implemented into my [login to view URL] enterprise environment. With each new lead a Patient ID is created (9 digit random ID number). This is then passed onto the account. This Patient ID number can be entered into our website and given a direct response, 3 different fields. I would like this to be secure. This is basically an update to what I've created here. [login to view URL] Thank you, I look forward to your response. Doug