4 ms·
Fiber needs transmitter and receiver transducers. If each side has only one of those, data can literally flow only in one direction. So it's still infosec-airga
by bonzini 9y ago
Fiber needs transmitter and receiver transducers. If each side has only one of those, data can literally flow only in one direction. So it's still infosec-airgapped in the other.
- SAI_Peregrinus 9y agoNo, data diodes are a different (but related) concept. An airgap implies no information transfer, either in or out. Use an airgap when information leakage must be stopped (as well as remote attacks), use a data diode when information can be released but you need to stop remote attacks. Fiber optic connections aren't required, anything with separate transmit and receive lines can be turned into a data diode (as long as the protocols used permit it). RS232 null modem cables with the RX lines disconnected are a classic.