A method and system for forming a data table in memory on an end user system. The data table forming a library index of storage locations to electronic digital content in memory. The method consists of retrieving an encrypted file from storage. The file has a beginning, an end and a trailer section located...http://www.google.com.au/patents/US7228437?utm_source=gb-gplus-sharePatent US7228437 - Method and system for securing local database file of local content stored on end-user system