The Performance Analyzer remote client requires a user name and password to connect to the remote server. The user name is stored to the disk in the user's home directory, but the password is never stored to the disk.
The Performance Analyzer remote client uses a Java implementation of ssh (jsch version 0.1.54) for connection to the sshd server on the remote host.
The Performance Analyzer client stores information in the file ~/.oracledevstudio/analyzer-12.6/analyzer.xml on all client platforms including Oracle Solaris, Linux, MacOS, and Microsoft Windows.