The Department of Defense, specifically the Department of the Air Force, is seeking information from potential vendors for the upgrade of the F-16 Identification Friend or Foe (IFF) transponder system as part of a market research initiative. This Sources Sought Synopsis aims to identify responsible sources capable of meeting stringent requirements, including compliance with cryptographic modernization standards, airworthiness, environmental durability, and cybersecurity, while also targeting small businesses with various ownership classifications. The selected vendors will be expected to provide a quality assurance plan, production timelines, costs, and logistics support, with responses due within 30 calendar days of the notice publication. Interested parties should contact Kirsten Rivera or Eric Dumpert via email, ensuring to include their company details and qualifications as outlined in the synopsis.