It uses secure tunelling. The information sits on the Synthetek server and gets downloaded directly into Synthetek's computers. Due to the tunelling, the info cannot be seen by anyone else in transit. The only time the info can be accessed is for the very brief period that it sits on the server, and even then a hacker has to break through the servers security measures. There have not been any security breaches for the entire time that Synthetek has been in business.
If you are a repeat customer, you can email Synthetek and request to pay by PayPal.
You can also order by fax. Email them for them number.