The OLSA Web Services supports authentication using an OASIS specification named UsernameToken with the WSS: SOAP Message Security. This OASIS specification can be found at: http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-username-token-profile-1.0.pdf.
The OLSA Web Services optionally supports HTTPS, which increases the communication security between the customer application and OLSA.