Affiliate Link and Packet Script

I've run into a bit of a problem. I need to be able to encrypt all of my links/packets containing my affiliate code. I've run into big problems with other people hijacking or sniffing packets. Here's the sequence of events I NEED to happen: 1. User clicks on link and sends them to [login to view URL] (The redirect script uses javascript and the javascript is encoded with my affiliate link.) 2. User is sent from the [login to view URL] to my affiliate link. 3. No affiliate details show in the address bar and packets on wireshark show encrypted data that doesn't seem like anything to the naked eye except a string of letters and numbers. 4. Clicks/sales are recorded as normal Here's what has been happening... 1. User clicks on link and sends them to [login to view URL] (The redirect script uses javascript and the javascript is encoded with my affiliate link.) 2. User is sent from the [login to view URL] to my affiliate link. 3. No affiliate details show in the address bar BUT the affiliate ID and complete url including relevant details are all visible in a packet. 4. Clicks/sales are recorded as normal Is this even possible? If so, please quote a price. Thanks!