The upside to this is that such a network can generally be regarded as a closed system (in terms of information, signals, and emissions security), unable to be accessed from the outside world. This access still has to be carefully controlled since USB drive may have vulnerabilities (see below). One way to transfer data between the outside world and the air-gapped system is to copy data on a removable storage medium such as a removable disk or USB flash drive and physically carry the storage to the other system. The concept represents nearly the maximum protection one network can have from another (save turning the device off). In some cases (for instance industrial critical systems), the policy is different: data can be moved from high-to-low with minimal security measures, but low-to-high requires a high level of procedures to ensure integrity of the industrial safety system. Access policies are often based on the Bell–LaPadula confidentiality model, where data can be moved low-to-high with minimal security measures, while high-to-low requires much more stringent procedures to ensure protection of the data at a higher level of classification.
This is also occasionally referred to as red (classified) and black (unclassified). In environments where networks or devices are rated to handle different levels of classified information, the two disconnected devices or networks are referred to as low side and high side, low being unclassified and high referring to classified, or classified at a higher level. That's why some new hardware technologies are also available like unidirectional data diodes or bidirectional diodes (also called electronic airgaps), that physically separate the network and transportation layers and copy and filter the application data.
#GET GAPPED MEANING FULL#
It is easier to control than a direct full network interface, which can be attacked from the exterior insecure system and, if malware infects the secure system, can be used to export secure data. Physical access has to be controlled (man identity and storage media itself). To move data between the outside world and the air-gapped system, it is necessary to write data to a physical medium such as a thumbdrive, and physically move it between computers. This represents a security vulnerability, so air-gapped computers either have their wireless interface controller permanently disabled or physically removed.
#GET GAPPED MEANING UPDATE#
Many computers, even when they are not plugged into a wired network, have a wireless network interface controller ( WiFi) and are connected to nearby wireless networks to access the Internet and update software.
It means a computer or network has no network interface controllers connected to other networks, with a physical or conceptual air gap, analogous to the air gap used in plumbing to maintain water quality.Īn air-gapped computer or network is one that has no network interfaces, either wired or wireless, connected to outside networks. An air gap, air wall, air gapping or disconnected network is a network security measure employed on one or more computers to ensure that a secure computer network is physically isolated from unsecured networks, such as the public Internet or an unsecured local area network.
0 kommentar(er)
