ProductCart communicates with SubscriptionBridge over HTTPS. As a result, all of your sensitive information is secured using SSL encryption. For additional protection SubscriptionBridge also requires all 3rd Party software to complete an activation process. During activation SubscriptionBridge records the IP Address of the 3rd Party system. Any system not of the authorized IP Address that tries to connect without explicit permission from the store owner will be rejected. This IP Address security measure is just another layer of security that combined with 3-Token Authorization and HTTPS results in a secure integrati on.