Sem5 password is the Database password.
Encrypted password is Name of the password that encrypts communication
between the Symantec Endpoint Protection Manager,
clients, and optional Enforcer hardware devices. The
password can be from 1-32 alphanumeric characters and
is required.
check thread vikram comment for encryption
https://www-secure.symantec.com/connect/forums/sepm-installation-question-about-password