In addition to permission masks, files may be protected by file passwords. File passwords can be assigned at the time the file is created, by using the Security() function, or by the system administrator. The file password is a 10-byte ASCIIZ string.
A user cannot access the file, regardless of the file’s permission mask, if the correct password is not supplied when the file is opened.
The ADMIN superuser always has full access to files. They do not need to know the file password to access a file.