Abstract: An online file lodging system or digital safe, which comprises plural safes or safe user accounts, is disclosed for securely storing highly confidential files. A user of the system can create an individual safe by using account management tool. The system has a web-based use interface, from which the user can upload files for storage with detailed tracking information, grant the right of access to the owner of another safe, and generate authenticity certificate for proving the uploading time and the substance of the file in a future time.