Cryptographic technologies are used throughout government and industry to authenticate the source and protect the confidentiality and integrity of information that we communicate and store.The paper describes the impact of quantum computing technology on classical cryptography, particularly on public-key cryptographic systems.This paper also introduces adoption challenges associated with post-quantum cryptography after the standardization process is completed.Planning requirements for migration to post-quantum cryptography are discussed.The paper concludes with NIST's next steps for helping with the migration to post-quantum cryptography.
Cryptographic technologies are used throughout government and industry to authenticate the source and protect the confidentiality and integrity of information that we communicate and store.The paper describes the impact of quantum computing technology on classical cryptography, particularly on public-key cryptographic systems.This paper also introduces adoption challenges associated with post-quantum cryptography after the standardization process is completed.Planning requirements for migration to post-quantum cryptography are discussed.The paper concludes with NIST's next steps for helping with the migration to post-quantum cryptography.
Cryptographic technologies are used throughout government and industry to authenticate the source and protect the confidentiality and integrity of information that we communicate and store.The paper describes the impact of quantum computing technology on classical cryptography, particularly on public-key cryptographic systems.This paper also introduces adoption challenges associated with post-quantum cryptography after the standardization process is completed.Planning requirements for migration to post-quantum cryptography are discussed.The paper concludes with NIST's next steps for helping with the migration to post-quantum cryptography.
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.
The security of widely used public-key cryptographic algorithms (e.g., RSA, elliptic-curve cryptography) is expected to deteriorate once large-scale and fault-tolerant quantum computers are developed. The potential threat is severe because such algorithms underlie the IT infrastructure in modern society, such as in the financial industry. Although the threat is unlikely to materialize in the foreseeable future, the National Institute of Standards and Technology (NIST) has been in the process of standardizing post-quantum cryptography (PQC), which is designed to be secure against quantum computers. NIST has been scrutinizing the security and performance of 15 candidate algorithms (seven finalists and eight alternates). Standardization should accelerate the migration to PQC around the world, not only within the U.S. government. In this paper, we discuss recent trends in the R&D of quantum computers and the security risks of public-key cryptographic algorithms. Then we review NIST's ongoing progress in standardizing PQC and the responses of other organizations in support of the migration. Finally, we discuss future challenges for the real-world implementation of PQC.
Quantum computing is no longer a distant concern for cybersecurity planning. Its progress has raised serious questions about the long-term reliability of widely used public-key cryptographic systems, especially RSA, elliptic curve cryptography, and related key exchange mechanisms that currently protect digital communication, cloud services, financial transactions, government systems, and enterprise information assets. The main concern is that powerful quantum algorithms could weaken the mathematical assumptions on which these systems depend, creating future risks for encrypted data, digital signatures, identity systems, and secure network protocols (Shor, 1994; Mosca, 2018). Post-quantum cryptography has therefore become a major cybersecurity readiness priority, not only as a technical replacement for vulnerable algorithms, but as a broader organizational migration challenge. Effective preparation requires cryptographic asset inventory, risk classification, crypto-agility, vendor coordination, interoperability testing, and phased deployment across complex information systems (Kumar, 2022; Campbell, 2025). This article examines the cybersecurity implications of quantum computing and reviews the major post-quantum cryptographic algorithm families, current standardization efforts, enterprise migration barriers, and strategic readiness measures needed for the quantum computing era. It also discusses the importance of aligning post-quantum migration with existing cybersecurity governance, information systems management, and long-term digital resilience planning. By emphasizing early preparation, structured migration, and continuous cryptographic governance, the article argues that organizations can reduce future quantum-related exposure and strengthen the security of critical digital infrastructure before large-scale quantum attacks become practical (NIST, 2024; NCCoE, 2025).
While advances in quantum computing promise new opportunities for scientific advancement (e.g., material science and machine learning), many people are not aware that they also threaten the widely deployed cryptographic algorithms that are the foundation of today's digital security and privacy. From mobile communications to online banking to personal data privacy, literally billions of Internet users rely on cryptography every day to ensure that private communications and data stay private. Indeed, the emergence and growth of the public Internet and electronic commerce was arguably enabled by the invention of public-key cryptography. The key advantage offered by public-key cryptography is that it allows two parties who have never communicated previously to nevertheless establish a secure, private, communication channel over a non-private network (e.g., the Internet). Recent advances in quantum computing signal that we are on the cusp of our next cryptographic algorithm transition, and this transition to post-quantum cryptography will be more complicated and impact many more systems and stakeholders, than any of the prior migrations. This transition represents a major disruption within the IT industry and will broadly impact nearly every domain of our digital lives, from global commerce to social media to government and more. Cryptographic algorithm transitions take time and involve an extensive coordination effort across many stakeholders who are involved in building and operating the world's compute infrastructure. By preparing now for the upcoming transition to these new algorithms, we can ensure a more orderly, less costly, and minimally disruptive changeover.
The advent of quantum computing poses a significant threat to current cryptographic systems, particularly public-key algorithms such as RSA and ECC, which are vulnerable to quantum attacks like Shor's algorithm. Post-Quantum Cryptography (PQC) aims to develop and standardize quantum-resistant cryptographic algorithms to secure digital communications in the quantum era. This paper examines the current landscape of PQC, focusing on the evaluation and standardization efforts led by organizations such as the National Institute of Standards and Technology (NIST). We analyze the major families of quantum-resistant algorithms, including lattice-based, hash-based, code-based, multivariate, and isogeny-based cryptography, discussing their security guarantees, performance trade-offs, and implementation challenges. Furthermore, we review NIST's PQC standardization process, highlighting selected finalists and alternate candidates, and explore the ongoing transition challenges in adopting these algorithms across industries. Finally, we discuss future directions for PQC research, including hybrid cryptographic systems and the need for continued cryptanalysis to ensure long-term security. This work provides a comprehensive overview of the progress and challenges in deploying quantum-resistant cryptography to safeguard against emerging quantum threats.