No matter the data store in computers, smart phones or cloud, there are always many security vulnerabilities. If you store your privacy in these places, there is risk to be stolen. Only rely on anti-virus software or firewall to protect the data, all data will be at a glance if hackers invasion successfully. Therefore, the best way is to encrypt all the data, hackers cannot easily crack even they obtain them. data encryption technology use the way of hardware software integration to encrypt individual file. The encrypted files not only can safely store in computer but also can safely share to others by cloud.