Beyond Quantum Readiness: Securing Government and Defence Communications for the Post-Quantum Era
Quantum computing gives Defence and government a reason to modernise cryptography. At MilCIS 2026, PentenAmio joins the conversation on how that transition can build more resilient, adaptable communications for the missions and threats of tomorrow.
Wednesday, November 18, 2026 | 11:30 AM – 12:30 PM | Royal Theatre
Presentation Outline
The emergence of quantum computing represents one of the most significant challenges to modern cryptography and the security of government and defence communications. While practical quantum computers capable of breaking today’s encryption standards may still be developing, adversaries can already conduct “harvest now, decrypt later” operations, intercepting and storing sensitive communications for future exploitation. Information created today encrypted using traditional methods, the risk of compromise is real and requires action today.
This panel discussion examines the evolving post-quantum threat landscape, the complexity of transitioning critical communications infrastructure to quantum-resistant security, and the practical challenges organisations face in modernising cryptographic systems. It explores the operational limitations of traditional key distribution approaches, including lengthy re-keying processes, reliance on human intervention, supply chain risks, and the burden placed on end users.
Drawing on lessons from UK government and industry collaboration, the session will discuss emerging approaches to cryptographic modernisation, including Over-the-Network Keying (OTNK), centralised key management, and the development of next-generation post-quantum cryptographic solutions. Attendees will gain insight into how government and Defence organisations can reduce risk, improve agility and operational security, and take practical action today through a phased transition towards quantum-resilient communications that safeguard mission-critical information against future threats.
The discussion will also highlight the importance of trusted international partnerships, standards-based approaches, and collaborative innovation between governments and industry in addressing a shared security challenge.
Meet the Panel
MAJGEN (Retd) Dr Marcus Thompson
Moderator
Dr Marcus Thompson AM is a Non-Executive Director of Bank Australia and archTIS, and a Strategic Adviser to PentenAmio. A retired Major General, he served 34 years in the Australian Army, culminating as the Australian Defence Force’s inaugural Head of Information Warfare. Marcus is also the founder of Cyber Compass, holds a PhD in Cyber Security and was appointed a Member of the Order of Australia in 2014.
Adrian Cunningham
Executive Co-Chair PentenAmio
Adrian Cunningham is Executive Co-Chair of PentenAmio and an experienced engineer and technology leader specialising in secure communications, cyber security and national security. He founded Amiosec in 2014 and led its growth as a trusted cyber innovation partner to defence and government before its merger with Penten in 2025. Adrian previously led a national security business within L3TRL Technology, now L3Harris.
Rachel Noble
Strategic Advisor & Former Director-General Australian Signals Directorate
Rachel Noble is the former Director-General of the Australian Signals Directorate, Australia’s signals intelligence and cyber security agency. She has held senior national security and policy positions across government, including Home Affairs, Immigration, Defence, Prime Minister and Cabinet, and Customs and Border Protection. Rachel is now a national security adviser specialising in cyber, space, and emerging technologies.
James Cawley
Head of Crypt-Key Technology L3Harris Technologies
James Cawley is Head of Crypt-Key Technology for the Global Spectrum Superiority UK Business Unit within L3Harris Technologies. He leads innovation and product development across the L3Harris Crypt-Key portfolio, including high-grade CATAPAN cryptographic products in addition to tactical and strategic key management solutions. James joined L3Harris in 2004 and holds a Bachelor of Engineering in Electronics and Communications Engineering from Nottingham Trent University.
Lucy Austen
Head of Business Development and Sales Cyber1st
Lucy Austen is Head of Business Development and Sales at Cyber1st, where she supports nationally significant capabilities spanning safety-critical aerospace products, high-grade secure communications and high-assurance information services. She is Deputy Chair of the UK National Cyber Security Centre’s Crypt-Key Industry Representatives Group (NCSC CKIS) and a co-Vice Chair of techUK’s Cyber SME Forum, advocating for collaborative, practical and operationally focused policy outcomes.