-setowner
Specifies the password (also known as the owner name) of a file in order to restrict access to the file. This password can be removed using -clrowner.
Usage
ctutil -setowner file password 0|1
file - File name (without extension).
password - File password.
0 - Password is required for any access mode.
1 - Permits read-only access if password is not specified.
The password parameter is mandatory. The maximum password name length is 10 bytes. In order to remove an existing file password, the -clrowner command must be used to specify the password with the -o option.