This document has not been formally reviewed for accuracy and is provided "as is" for your convenience.
Summary
The SSL server configuration is the recommend way to secure data transition between ALM client and server
Question
The only type of data which has a special handling during transition between client and server is the passwords. However HP ALM/QC passwords are just obfuscated before transferred in order to avoid occasional sniffing. In order to secure password transfer (and data transfer in general) use a secure communication between client machines and servers according to recommendation provided in QLM/QC documentation.
Answer
You can find more details on how to secure client/server communication in our installation guides or in our Secured Deployment and Configuration Guide