You may also migrate the old filevault version to new one to make sure the security in place is up to date. The link gives you complete insight about Filevault and how to activate filevault latest version on your Apple Mac computer. You may use Filevault to protect your Mac Disk with Encryption.
In other words, your Macbook or iMac can be hacked by some malicious hacker with any one of this method.
It is ofcourse possible for others to access your files and folders in your Mac. You can use one of this method to get back to your desktop, if you have forgotten the password. Have you forgot your Mac OS X Lion administrator password and dont know how to get back to your desktop ? If you are searching for a way to recover password Mac OS X Lion then here we have two easy methods to do that.