Randman
HA! HA! HA!
Keychain is good. But if you really want to be secure, use the suggestion on the first page and make a password-protected disk image in Disk Utility and store your file in there.
You can also rename a file or folder via terminal and turn it invisible. I've not done that but I think it's just by adding a period/full stop to the beginning of the file.
You can also rename a file or folder via terminal and turn it invisible. I've not done that but I think it's just by adding a period/full stop to the beginning of the file.