Installation of CDSA on OpenVMS Alpha Version
7.3-2
If you install or upgrade to OpenVMS Alpha Version 7.3-2,
CDSA Version 2.0 is automatically installed. Before you can use
CDSA Version 2.0, however, you must execute the following command
to initialize CDSA:
$ @SYS$STARTUP:CDSA$UPGRADE
Note that you must have the SYSPRV and CMKRNL privileges to
execute this procedure. This command automatically calls CDSA$INITIALIZE().
HP Open Source Security for OpenVMS Volume 1:... 
Installation and Initialization