The impending arrival of viable quantum computing is a major worry to modern-day identity management systems that mainly depend on classical public-key cryptography techniques such as RSA and elliptic curve. Such systems are the basis of secure infrastructure in digital identities such as authentication, digital signature and trust models based on certificates. These cryptographic primitives can be broken using quantum algorithms like Shor and Grover, compromising the privacy of credentials and sessions stored and authenticated on digital ecosystems. The paper provides the necessity of the transition of identity management systems to post-quantum cryptographic (PQC) algorithms that will be resistant to quantum attacks. It gives a general overview of quantum-exposed identity protocols, as well as a look at the up-and-coming PQC algorithms under development, with a special call to digital signature algorithms capable of identity provision, authentication, and credential lifecycle management. Moreover, the paper isolates the problems of integration which include key size overhead, legacy system compatibility and performance trade-offs and suggests integration to take place through the use of hybrid and decentralized framework to allow a secure migration. This study will form part of a strategic plan to a post-quantum identity infrastructure, with the long term reliability, validity, and withstanding of quantum-era vulnerabilities.
The impending arrival of viable quantum computing is a major worry to modern-day identity management systems that mainly depend on classical public-key cryptography techniques such as RSA and elliptic curve. Such systems are the basis of secure infrastructure in digital identities such as authentication, digital signature and trust models based on certificates. These cryptographic primitives can be broken using quantum algorithms like Shor and Grover, compromising the privacy of credentials and sessions stored and authenticated on digital ecosystems. The paper provides the necessity of the transition of identity management systems to post-quantum cryptographic (PQC) algorithms that will be resistant to quantum attacks. It gives a general overview of quantum-exposed identity protocols, as well as a look at the up-and-coming PQC algorithms under development, with a special call to digital signature algorithms capable of identity provision, authentication, and credential lifecycle management. Moreover, the paper isolates the problems of integration which include key size overhead, legacy system compatibility and performance trade-offs and suggests integration to take place through the use of hybrid and decentralized framework to allow a secure migration. This study will form part of a strategic plan to a post-quantum identity infrastructure, with the long term reliability, validity, and withstanding of quantum-era vulnerabilities.
The emergence of quantum computing introduces unprecedented risks to classical cryptographic schemes, particularly digital signatures that safeguard authentication, confidentiality, and data integrity across digital ecosystems. To address these concerns, this paper investigates the adoption of Post-Quantum Cryptography (PQC) within Public Key Infrastructure (PKI) frameworks, emphasizing its role in strengthening electronic signature (eSign) systems against quantum threats. Traditional PKI implementations rely on algorithms such as RSA and ECC in combination with Hardware Security Modules (HSMs) for secure key management; however, these methods are vulnerable to quantum algorithms like Shor's. We examine how quantum-resistant alternatives-including lattice-based, hash-based, and multivariate polynomial-based schemes standardized by NIST-can be integrated into PKI without compromising interoperability and compliance. A comparative evaluation highlights trade-offs in performance, storage, and computational complexity while demonstrating the feasibility of embedding PQC into existing eSign infrastructures. Our findings underscore the urgency of transitioning towards quantum-safe digital signatures to ensure resilience, regulatory alignment, and long-term trust in national-scale digital services.
The advent of quantum computing poses an existential threat to contemporary cryptographic standards, particularly those securing decentralized blockchain networks and cloud infrastructures.Classical public-key cryptosystems such as RSA, ECC, and DH, which rely on factorization and discrete logarithm problems, are rendered obsolete by Shor's algorithm, necessitating the transition toward post-quantum cryptographic (PQC) solutions.This study explores the integration of PQC algorithms, including lattice-based, hash-based, code-based, multivariate, and isogeny-based cryptographic mechanisms, within blockchain-ledger technologies and cloud architectures to ensure long-term security against quantum adversaries.A comparative analysis is conducted to evaluate computational efficiency, key size implications, communication overhead, and security resilience under quantum attack models.The research highlights the adaptation of PQC within blockchain consensus mechanisms, smart contract execution, and cryptographic primitives such as digital signatures, zero-knowledge proofs, and secure multi-party computation (MPC).Additionally, it examines the impact of PQC on cloud security, addressing challenges in quantum-safe key exchange protocols, homomorphic encryption for secure computations, and cross-platform interoperability within hybrid quantum-classical cloud ecosystems.Real-world implementations and benchmarking data provide insights into the feasibility of large-scale adoption, shedding light on standardization efforts by NIST and industry consortia.The study concludes with future directions, emphasizing the need for efficient PQC algorithm optimization, lightweight cryptographic frameworks for IoT-driven blockchain applications, and scalable post-quantum identity management systems.By establishing quantum-resistant security frameworks, this research underscores the imperative need for early adoption to mitigate cryptographic vulnerabilities in the impending post-quantum era.
Quantum computing poses an existential threat to classical public-key cryptography, particularly RSA and elliptic-curve systems, which form the backbone of secure communication, authentication, and digital trust. Once scalable quantum computers emerge, algorithms such as Shor’s will be capable of breaking these schemes, jeopardizing confidentiality and integrity across the internet and enterprise systems. Post-quantum cryptography (PQC) offers a viable defense, providing quantum-resistant algorithms that can be implemented on today’s hardware and protocols. Recent standardization milestones—including NIST’s approval of ML-KEM (Kyber) for key establishment, ML-DSA (Dilithium) and SLH-DSA (SPHINCS+) for signatures, and the selection of HQC as a complementary KEM—mark a turning point for practical adoption. This paper surveys the quantum threat model, algorithm families, performance trade-offs, and integration patterns such as hybrid modes and crypto-agile architectures. It further outlines a phased migration roadmap for enterprises, emphasizing harvest-now-decrypt-later risks and compliance imperatives. By bridging technical, operational, and policy perspectives, the study provides actionable guidance to prepare organizations for a secure and quantum-resilient future.
Development of Quantum Computers are growing rapidly, the security of today’s cryptographic systems which are working with Public Key Infrastructure (PKI) is at serious risk. RSA and ECC algorithms are the backbone of secure communication and digital identity can be breakable by quantum algorithms such as Shor’s. Hence, a transition is required to Post-Quantum Cryptography (PQC), which is designed to handle quantum attacks. This work provides a detailed review of how PQC can be integrated with the existing PKI, with a special focus on the auto-enrollment process. Auto-enrollment is an essential process but often overlooked mechanism, responsible for automatically issuing and renewing digital certificates. First, we explored how current PKI systems are exposed to the quantum threats and the readiness. The performance of the algorithms that are standardized by NIST, such as Kyber and Dilithium were discussed. We analyze the technical and operational challenges of transitioning to PQC by referencing both research studies and real-world implementations from major industry players such as Google and Microsoft. These include large key size, certificate size, compatibility issues, complex computations and need for crypto-agility. We also examine the hybrid approaches that combine classical and post-quantum methods as traditional strategies. The survey concludes by outlining best practices, deployment considerations, and open research challenges that must be addressed for a smooth, secure, and scalable shift to quantum-safe PKI. This work aims to guide researchers, engineers, and policymakers in building the next generation of cryptographic infrastructure that can stand the test-time even in a quantum world.
The emergence of quantum computing presents significant challenges to existing Identity and Access Management (IAM) systems, particularly concerning the security of current cryptographic algorithms. As quantum computers evolve, traditional public-key cryptography methods like RSA and ECC face increasing vulnerability, necessitating a transition to quantum-resistant alternatives. This document explores the critical intersection of post-quantum cryptography and IAM, examining the transformation required in security frameworks to maintain resilience in a quantum-enabled future. The discussion encompasses the evolution of quantum threats to current IAM implementations, the development of post-quantum cryptographic solutions, the essential transformation of IAM infrastructure, and the integration of advanced technologies, including artificial intelligence and quantum-safe authentication mechanisms. Special attention is given to practical implementation considerations, including hybrid authentication models and the modernization of Public Key Infrastructure (PKI) systems to ensure continued security in the post-quantum era.
The accelerating development of quantum computing represents one of the most significant paradigm shifts in the history of information security. Cryptographic systems that currently underpin global digital infrastructure—including RSA, Diffie–Hellman, and Elliptic Curve Cryptography—rely on mathematical assumptions that collapse under quantum algorithms such as Shor’s and Grover’s. Post-Quantum Cryptography (PQC) emerges as the most viable and immediate solution to secure communications in the quantum era, offering cryptographic primitives that can be deployed on today’s classical hardware while resisting both classical and quantum attacks. This review provides a comprehensive, detailed examination of PQC, analyzing its mathematical foundations, algorithmic families, standardization progress, and deployment challenges. Special emphasis is placed on the NIST PQC standardization process, the risk posed by “harvest-now-decrypt-later” adversaries, the complexities of global cryptographic migration, and the implications for critical digital infrastructures such as cloud computing, blockchain systems, long-lifespan data archives, IoT ecosystems, and national cybersecurity. Through standalone equations, tables, and figures—including a conceptual visual provided by the user—this paper offers a complete, cohesive, and rigorous synthesis. The findings underscore that the transition to PQC is not optional but imperative, requiring coordinated scientific, governmental, and industrial effort to safeguard the digital future.