At DipJar we emphasize making our product as simple and secure as possible. Transmitting credit card info via cellular 2G/3G signal makes it so all you have to do is plug in your DipJar. It also means greater security because the DipJars are not running the chance of transmitting data over a public WiFi network. In addition, all transmissions are encoded so that the information is completely secure. We undergo regular security reviews to make sure your information is safe.