There are several free and paid software programs which can cloak the link. I have found an easy and quick way to do this online.
Visit http://www.TinyURL.com. Enter your affiliate link in the box provided. Follow the instructions. Within seconds, your shortened affiliate link will be there. No one will know your Clickbank ID now.
Copy and paste this URL for your affiliate link. Your affiliate link is intact inside because of the "cloaking". So your tiny and tidy link is now ready.
This service is absolutely free. If you like,you may consider contributing some donation at a later stage when you start making substantial affiliate income.