SRG-OS-000074-GPOS-00042
The operating system must transmit only encrypted representations of passwords.
Canonical Source
SV-203630r987796_rule ( from General Purpose Operating System Security Requirements Guide )Description
Passwords need to be protected at all times, and encryption is the standard method for protecting passwords. If passwords are not encrypted, they can be plainly read (i.e., clear text) and easily compromised.