US Patent 7793108 Method of creating password schemes for devices

A method of creating a password scheme for a mobile device includes partitioning a storage space on the mobile device into a public portion and a secure portion and encrypting access to the secure portion of the storage space by creating a long password, where the long password being composed of a series of bits of data previously stored on the mobile device in an non-encrypted form. Creating a long password includes assigning portions of the long password to a plurality of media files already stored on the mobile device and concatenating each of the portions of the long password to form the long password. The long password is used to decrypt data stored in the secure area of the mobile device.