Your jet's radio is a soft spot. India just signed the next paper to build its own

Why a radio on a plane is not a small thing

A fighter, a transport or a helicopter is only as useful as the people who can talk to it. Orders, positions, fuel state and threats all move as signals. If those signals are weak, late or open to an adversary, the aircraft is flying half blind.

Much of that machinery has long come from abroad. Buying a radio is not the same as owning the software that decides how it encrypts, routes and recovers under attack. That gap is what the Indian Air Force is trying to close.¹⁴

What the Air Force asked the lab to do

The Software Development Institute, or SDI, is the Air Force unit that builds and tends software for the service. On 6 November 2026 it signed a Memorandum of Agreement with the Indian Institute of Technology Madras and with IITM Pravartak Technologies Foundation, the institute's technology translation arm.¹²

A memorandum of agreement is a formal working deal. It is stronger than a memorandum of understanding, which is mainly a statement of intent. The ministry's release says the partners will jointly design and develop an indigenous digital communication system for airborne use, with work on advanced algorithms for communication systems and networking.¹²³

Air Vice Marshal Sarabjit Singh, Commandant of SDI, and Dr M.J. Shankar Raman, chief executive of IITM Pravartak, signed the paper. Professor V. Kamakoti, Director of IIT Madras, was present.¹²

The problem they named last December

This was not the first handshake. In late December 2025, newspapers reported a Ministry of Defence release on an earlier Memorandum of Understanding between the same three partners for the same goal: an indigenous digital secure communication system for aircraft.⁴⁵

That MoU was signed by Air Vice Marshal R. Guruhari, then Commandant of SDI, with Professor Kamakoti and Dr Shankar Raman. Reports quoting the ministry said the focus areas included advanced encryption protocols, secure data transmission, resilience against cyber and electronic threats, scalability of airborne networks, and integration with existing defence systems.⁴⁵

They also said the joint effort was expected to yield deployable prototypes. The December reports framed the point in plain terms: aircraft now fight as part of networks, and the data that moves between them has to stay fast and hard to steal.⁴⁵

Then the paper thickened

About ten months later, the partners moved from understanding to agreement. The 6 November PIB release repeats the core aim in shorter form: indigenous design, less reliance on imported systems, and better operational efficiency for the Air Force under the Aatmanirbhar Bharat push.¹²

It does not list a budget, a delivery year, a platform that will fly the radio first, or a trial calendar. The mass moment is the signature, not a flight.¹

What this does not yet fix

An MoA does not put a secure radio on a wing. It does not prove the algorithms will survive jamming, or that prototypes will clear flight clearance. Those steps still sit after the paper.

The November release also does not say how this project sits beside other indigenous radio work across the services. Readers should treat the MoA as a working arrangement with named partners, not as a finished capability.¹

What to watch

Watch for the first named prototype, flight trial or induction notice. Until one of those appears in an official release, the story is still about who is allowed to build the system, not about who is already flying it.¹