Detecting and deterring network attacks

The present disclosure pertains to detecting a network attack. In one embodiment, a first device may receive a high-precision time signal and may use the signal to associate a first time stamp with each of a plurality of data packets reflecting a time that each data packet is transmitted. A second device may receive the plurality of data packets from the first device via a data network. The second device may also receive the high-precision time signal and may use the signal to associate a second time stamp with each of the plurality of data packets reflecting a time that each data packet is received. A time of flight may be determined based on the first time stamp and the second time stamp. The second device may determine whether the time of flight for each of the first plurality of data packets is consistent with a valid time of flight.