Data Diode

Air-gapping can be achieved by separating two systems with link22 Data Diode that on the physical level guarantees that data can only flow in one direction. link22 Data Diode provides a separation with much higher assurance than other mechanisms, such as firewalls.

By using link22 Data Diode a closed system containing confidential information can be fed with information from an open system, while ensuring that no confidential information can leak to the open system.

Examples:

• Import of Operating System updates.
• Supplying closed systems with time from an external NTP server.

With link22 Data Diode information from a closed systems can be passed to an open system while ensuring that no modification of information in, or attack on, the closed systems is possible.

Examples:

• Export of PLC reading in critical infrastructure systems.
• Protection of data sent to log server.

One-way communication systems are sensitive to link errors, for instance power interrupts, cabling issues and other network problems. To maintain high reliability you can use software that have mechanisms to increase reliability and alert when failures occur. Our portfolio of diode product and solutions increases reliability through retransmissions; heartbeat functionality will detect and alert any link errors. A receiving proxy will, in addition, verify the integrity of transferred data ensuring that you can trust that the data has been transferred correctly and without errors. It is also important to limit bandwidth usage over the data diode to prevent package loss.