This executive summary analyzes the implications of emerging quantum computing capabilities for homeland security and the transition to post-quantum cryptography. It addresses risks associated with "harvest now, decrypt later" strategies, vulnerabilities in space-based systems and critical infrastructure, and security concerns for positioning, navigation, and timing (PNT) services. Additionally, the report reviews federal post-quantum cryptography initiatives, governance challenges, and systemic risks to national security. Recommendations include automated cryptographic discovery, hybrid key exchange methods, software-defined cryptography for space systems, Zero Trust security architectures, and resilient backup technologies to mitigate quantum-related threats.
This executive summary analyzes the implications of emerging quantum computing capabilities for homeland security and the transition to post-quantum cryptography. It addresses risks associated with "harvest now, decrypt later" strategies, vulnerabilities in space-based systems and critical infrastructure, and security concerns for positioning, navigation, and timing (PNT) services. Additionally, the report reviews federal post-quantum cryptography initiatives, governance challenges, and systemic risks to national security. Recommendations include automated cryptographic discovery, hybrid key exchange methods, software-defined cryptography for space systems, Zero Trust security architectures, and resilient backup technologies to mitigate quantum-related threats.
This paper explores the transition from theoretical quantum-risk planning to the practical implementation of post-quantum cryptography in the homeland security sector. It focuses on space infrastructure, critical infrastructure protection, and national resilience, assessing threats posed by the "harvest now, decrypt later" approach, post-quantum cryptographic standards, and vulnerabilities in positioning, navigation, and timing systems. The analysis also addresses governance challenges, procurement requirements, and satellite security, proposing resilience-oriented strategies for the protection of national infrastructure. Key recommendations include adopting hybrid cryptographic solutions, automating the detection of vulnerable systems, continuous attestation, cryptographic agility in orbit, and establishing a Space-Quantum Reserve to bolster long-term resilience against quantum threats.
The advent of quantum computing poses a significant threat to contemporary cryptographic systems underpinning national security infrastructures globally. Classical public-key cryptographic algorithms such as RSA and ECC, which secure communications, data storage, and critical infrastructure, are vulnerable to quantum attacks, particularly through Shor’s algorithm. Post-Quantum Cryptography (PQC) aims to develop quantum-resistant cryptographic primitives to ensure confidentiality, integrity, and authentication in the quantum era. This article explores the implications of PQC adoption for national security, including the challenges of transitioning legacy systems, potential vulnerabilities during migration, and the strategic importance of standardizing PQC protocols to safeguard military, governmental, and critical infrastructure communications. The article also discusses policy recommendations for governments to mitigate emerging quantum risks.
This introductory chapter offers a strategic executive summary of the post-quantum cryptography (PQC) challenge, providing cybersecurity leaders, board members, and C-suite executives with a high-level, business-focused overview of the quantum computing threat. It explains how quantum computers will eventually break the public key cryptography that secures digital trust and emphasizes why organizations must begin preparing now – before adversaries can exploit these vulnerabilities at scale. The chapter defines Q-Day, explains the “Harvest Now, Decrypt Later” threat model, and reframes quantum risk in terms of enterprise revenue, cost, and regulatory exposure. Designed as a standalone executive briefing, the chapter outlines the Q-Ready Framework: a five-phase operational roadmap for quantum readiness encompassing discovery, planning, implementation, validation, and maintenance. It highlights critical actions such as cryptographic inventory, migration planning, crypto-agility, vendor risk assessment, and executive governance. The chapter also includes communication templates, boardroom messaging, key performance indicators, and frequently asked questions to help CISOs engage stakeholders and secure organizational buy-in.
As the role of space-based infrastructure becomes increasingly integrated with global communication, navigation, and data collection, cyber threats for attacks in the space domain expand, especially with the advent of quantum computing. Ground stations, space stations, payloads, and signal communications are vulnerable to quantum-enabled cyber threats that could undermine security and data integrity. This paper discusses the vulnerabilities that quantum computing poses to current cryptographic protocols and refocuses on implications for space domain systems. It analyzes the critical need to adopt post-quantum cryptography in order to secure space communications and minimize risks from quantum decryption. It further elaborates on the difficulties of PQC implementation within space-based systems, including issues related to resource constraints, system complexity, and integration with operational processes. This research provides key insights into some of the key practical considerations on how to maintain long-term secure space communications through a quantum-enabled future.
The landscape of quantum technology is evolving with computing at the forefront of nations’ policies and budgets. Post-Quantum Cryptography (PQC) promises a new era of secure information with the threat that quantum-capable computers pose to classical encryption methods. In response, the federal government has issued national security memoranda which aim to secure government and corporate systems. However, current policy does not address the issue of "harvest now, decrypt later" attacks, where adversaries collect classically encrypted information today to decrypt once a quantum-capable computer is developed. This inevitable mass decryption event would expose large amounts of classified information and could potentially undermine strategic stability. Countries like Russia and China have already invested heavily to develop quantum computers and outpace our capabilities. To counter this risk, federal agencies—including NIST, NSA, DHS, and the State Department—must accelerate the quantum-resistance timeline, expand access to new encryption standards, and create organizations that support diplomatic engagement. These efforts will reduce our vulnerability and strengthen bilateral relations in this new era of information security.
As quantum computers advance, they will fundamentally change the ways the information systems that currently secure communications, financial systems, healthcare records, government databases and critical infrastructure are protected. Although quantum technologies offer great promise for future scientific endeavors and processing power, they also present new dangers for cybersecurity. This paper explores the threats that are emerging as a result of Quantum Computing, focusing on the vulnerability of popular public-key cryptographic methods like RSA, Diffie–Hellman and Elliptic Curve Cryptography. The study also delves into the consequences of "harvest now, decrypt later": Information encrypted today could be made available when sufficiently strong quantum computers are ready. The research adopts a qualitative approach with a thorough literature survey of scholarly works on quantum-safe security standards, international cybersecurity frameworks, and recent advancements in the field. It evaluates the readiness of organizations, governments and technology vendors to deal with the changing threats of quantum computing. The study also highlights emerging counter measures, such as post quantum cryptography, quantum key distribution, cryptographic agility, zero trust security architectures, and risk-based migration strategies to build long-term cyber resilience. The results indicate that while large-scale quantum computers are still being developed which could compromise current encryption systems, it is important to plan ahead and implement quantum-resistant technologies to mitigate future security risks. To achieve quantum-safe cybersecurity, a concerted effort is needed, involving a collaboration between policymakers, researchers, industry players and standardization organizations, to provide secure digital ecosystems. In the end, the paper argues that a blend of quantum-resistant cryptographic solutions and adaptive cybersecurity governance and continuous innovation will be a critical enabler in protecting information assets in the quantum era. The study will contribute to the existing body of work on quantum cybersecurity and provide insights into the challenges and opportunities of creating secure and future-proof cybersecurity systems.