Thus, the two PCs are never active concurrently. When a computer is interconnected within an external network, data communication is not restricted to the intentional authorized packets. Via the same on-line link the user communicates through, network intruders may penetrate the system stealing data or maliciously damaging records. If the user is concurrently linked on-line to an internal network such as an organizational LAN or WAN, the intruder can further penetrate the system and hop from the user's PC through that LAN or WAN to other systems. As the Internet is a chaotic network, with no central management or authority, it is a heaven for crackers, hackers, and software virus distributors.
Hackers can anonymously penetrate systems at an extremely low risk of being caught.
Regardless of the data security threats, an increasing number of users are aware of the Internet as a critical source of information and an essential productivity tool to every modern organization. The business world is widely adopting a variety of complex software technologies, such as Firewalls, Proxy Servers, Intrusion Detection and Access Control mechanisms to analyze and filter communications in an attempt to lower external security threats from the Internet. However, due to their tremendous complexity and intrinsic limitations, these on-line analysis implementations cannot provide the high level of data security required by financial institutions, law firms, hospitals and the government. Using Duplicate Workstations for Data Security Security officers charged with securing classified data, rely primarily on the fundamental assertion that if no link to the network exists, network security threats are limited. Many organizations are requesting that confidential data be effectively secured against network intrusion through physical separation between their internal environment and the external hostile world.