Using HP-UX Internet Services (August 2003)

Secure Internet Services
Chapter 968
Beginning with HP-UX 11.0, the product was replaced by the SIS
mechanism (InternetSvcSec), which incorporates Kerberos V5 Release
1.0 authentication for the remote access services.
The main advantage is that if you are running SIS, your security is
enhanced because authorization is no longer required for transmitting a
password in a readable form over the network.
IMPORTANT The SIS libraries do not encrypt the session beyond what is necessary to
authorize you (the user) or authenticate the service. Therefore, these
services do not provide integrity checking or encryption services on the
data or on remote sessions.