Mac OS X 10.3 Panther and 10.4 Tiger's FileVault security feature prevents other users from accessing your home directory.
FileVault is a security feature of Mac OS X 10.3 or later. It encrypts your home directory and saves it as a disk image file. For more information about FileVault, choose Mac Help from the Help menu in the Finder and search on "FileVault".
You can turn on FileVault in Security preferences or Accounts preferences.
When you turn on FileVault, your home directory, including your Public folder and Drop Box, is unavailable if you've logged out. To make it available, log into your account.
If you connect to the computer via file sharing (or any sharing service), you won't see your shared (Public) folder or Drop Box. To see it in Mac OS X 10.3 through 10.3.9, log in at the computer where your account is. In Mac OS X 10.4 or later, you won't see your shared (Public) folder or Drop Box after you log in at the computer where you account is.
This document will be updated as more information becomes available.