You can assign one or both types of passwords to the current map:
Password to open - This password is required to open the map
Password to modify - This password is required to modify the map.
Caution: Once you save the map you cannot open or modify it without entering the password(s) you assigned. The file cannot be recovered if you lose the password. It is advisable to keep a list of passwords and their corresponding document names in a safe place.
You have the option to remember the encryption password for the map the first time you open it. You will not be asked for the password again unless you open the map on a different computer, or unless you choose to delete all stored passwords.