NonStop EXPAND networking software over IP is the predominant protocol used to interconnect multiple NonStop servers over a local or wide area network. Since the NonStop server currently does not offer encryption of Expand connections, all data exchanged between NonStop servers is traversing the IP network in the clear. This includes UserIDs and passwords of remote TACL logins, files and application messages transferred between systems , as well as transactions replicated to a duplicate database using NonStop RDF or third party software.
According to Gartner group most attacks come from insiders, but with SecurCS for EXPAND, Expands vulnerability to sniffing attacks can be eliminated easily and transparently. With only a few simple installation steps, SecurCS can create an SSL tunnel for an EXPAND line, effectively encrypting all data which is exchanged between the NonStop servers. More information is available here.