1. A method for encrypting data in a computer in communication with a volatile memory and non-volatile storage device, comprising: encrypting pages in the volatile memory to move to a swap file in the non-volatile storage device as part of a virtual addressing system; moving the encrypted pages from the volatile memory to the swap file; decrypting pages in the swap file to move back into the volatile memory; and moving the decrypted pages in the swap file back into the volatile memory.