iit jammu: Anti-GPS jamming, identification devices developed by IIT Jammu nearing completion: Officials
Two projects being developed by IIT Jammu and CST Advanced Systems aim to protect GPS enabled assets from jamming and identify friendly forces during counter-terrorism operations. One project is an anti-GPS jamming device that can be retrofitted to protect navigation systems, while the other is an Identification Friend or Foe (IFF) device that helps detect friendly forces in the battlefield.
Source: indiatimes.com