DRDO said that none of its networks has been compromised throughhacking and it does not store classified information on computers connected to the internet.
"No classified information is kept stored on the machines connected to the internet. No network of DRDO has been compromised," DRDO spokesperson Ravi Gupta said.
He said DRDO maintains a strict "air gap" between the machines having internet and the ones without the facility.
DRDO talked about its networks' safety in the wake of reports that around 50 computers belonging to the armed forces and DRDO were hacked sometime back and classified files could have been compromised.
The computers that were reportedly hacked were located in South Block here and belong mainly to the Army, besides the other two forces.
National Security Advisor Shivshankar Menon had yesterday sought to downplay the hacking incident, saying there are "various forms of compromise" and "not every leaked password is a big threat to security".