Secure Data Transfer AKAS applications can be as secure or as open as is appropriate for the data being collected. For the most sensitive of solutions a total of 6 layers of security can be applied. Firstly access permissions can be defined for different user groups and individuals. Login and password protection can be applied to applications. Secure Socket Layer (SSL) data encryption can be applied to data in transit. This can be further enhanced with VPN tunnelling. Another technique available is third party server authentication. Finally to protect the central database a firewall is recommended.