Logon to service, would really lookup against auth API such as Windows/LDAP/mainframe RACF. Return GUID for subsequent calls. (Hard-coded logon is test/test) Logoff using GUID to identify session Request using GUID as authentication key, encrypt incoming message using GUID and return. Test unencryption, passing in GUID and results from PerformRequest method. Logon to service, would really lookup against auth API such as Windows/LDAP/mainframe RACF. Return GUID for subsequent calls. (Hard-coded logon is test/test) Logoff using GUID to identify session Request using GUID as authentication key, encrypt incoming message using GUID and return. Test unencryption, passing in GUID and results from PerformRequest method. Logon to service, would really lookup against auth API such as Windows/LDAP/mainframe RACF. Return GUID for subsequent calls. (Hard-coded logon is test/test) Logoff using GUID to identify session Request using GUID as authentication key, encrypt incoming message using GUID and return. Test unencryption, passing in GUID and results from PerformRequest method. Simple exercise in authentication and encryption