Technically the transmission is secured by:

• Using dedicated and fully controlled, full loop adapters
• The adapters are only using the "single, fixed URL addressing" method
• Optionally using Secure Socket Layer. The SSL security protocol provides data encryption, server authentication, message integrity, and optional client authentication for a TCP/IP connection

All users and employees are: 

• Legally embraced by confidentially clauses
• Physically prevented from data access by a passwords protected sign-on method, where only the actual user knows the password