The advent of quantum computing marks a transformative era in cybersecurity, challenging traditional cryptographic frameworks and broadening the horizons of computational capabilities. This paper explores the transition to a quantum-resistant security framework, offering a critical analysis of encryption methods essential for protecting critical infrastructure and cloud services in the quantum era. It evaluates the effects of quantum computing across various infrastructure layers, including applications, data, runtime, middleware, operating systems, virtualization, hardware, storage, and networks. The study identifies potential vulnerabilities and the evolving threat landscape conferred by quantum technologies, providing strategic insights for developing effective countermeasures. It advocates for preemptive and inventive security strategies and multi-sectoral collaboration to cultivate resilient, quantum-resistant cryptographic practices. The paper introduces a tailored security blueprint encompassing nine critical infrastructure components, reinforcing each domain's defenses against quantum-induced cyber threats. It also provides strategic vulnerability and risk assessments, equipping stakeholders with the acumen to navigate the complex, quantum-threatened landscape. The study highlights the need for quantum-resistant measures to shield against impending attacks and offers a comprehensive framework for strengthening infrastructure and cloud environments against the multifaceted challenges of the quantum era. Quantum computing's computational capabilities pose a significant threat to traditional cryptographic methods, such as RSA and ECC, which are foundational to data protection. Quantum computers can break these algorithms, leading to data breaches, identity theft, and unauthorized access. The paper discusses the risks associated with migrating from non-quantum-safe cryptographic systems to quantum-safe algorithms, including vulnerabilities such as cryptographic attacks that could break commonly used algorithms. It also addresses the risks of quantum-enabled attacks, such as denial-of-service attacks and cryptographic protocol attacks, even after migration. The study emphasizes the importance of quantum-resistant cryptography and the need for proactive measures to mitigate these risks. It introduces a risk assessment framework for infrastructure migration, providing criteria to systematically assess and mitigate risks related to adopting quantum-safe algorithms. The paper also highlights the importance of collaboration between organizations, hardware vendors, and cryptographic communities to develop robust security solutions. It discusses the impact of quantum computing on digital infrastructure, emphasizing the need for comprehensive security measures to protect against quantum threats. The study concludes that quantum computing presents a long-term threat to encryption, and organizations are actively researching and developing quantum-resistant encryption methods to mitigate these risks. The paper provides a detailed analysis of the threats posed by quantum computing, emphasizing the need for a proactive approach to cybersecurity in the quantum era.The advent of quantum computing marks a transformative era in cybersecurity, challenging traditional cryptographic frameworks and broadening the horizons of computational capabilities. This paper explores the transition to a quantum-resistant security framework, offering a critical analysis of encryption methods essential for protecting critical infrastructure and cloud services in the quantum era. It evaluates the effects of quantum computing across various infrastructure layers, including applications, data, runtime, middleware, operating systems, virtualization, hardware, storage, and networks. The study identifies potential vulnerabilities and the evolving threat landscape conferred by quantum technologies, providing strategic insights for developing effective countermeasures. It advocates for preemptive and inventive security strategies and multi-sectoral collaboration to cultivate resilient, quantum-resistant cryptographic practices. The paper introduces a tailored security blueprint encompassing nine critical infrastructure components, reinforcing each domain's defenses against quantum-induced cyber threats. It also provides strategic vulnerability and risk assessments, equipping stakeholders with the acumen to navigate the complex, quantum-threatened landscape. The study highlights the need for quantum-resistant measures to shield against impending attacks and offers a comprehensive framework for strengthening infrastructure and cloud environments against the multifaceted challenges of the quantum era. Quantum computing's computational capabilities pose a significant threat to traditional cryptographic methods, such as RSA and ECC, which are foundational to data protection. Quantum computers can break these algorithms, leading to data breaches, identity theft, and unauthorized access. The paper discusses the risks associated with migrating from non-quantum-safe cryptographic systems to quantum-safe algorithms, including vulnerabilities such as cryptographic attacks that could break commonly used algorithms. It also addresses the risks of quantum-enabled attacks, such as denial-of-service attacks and cryptographic protocol attacks, even after migration. The study emphasizes the importance of quantum-resistant cryptography and the need for proactive measures to mitigate these risks. It introduces a risk assessment framework for infrastructure migration, providing criteria to systematically assess and mitigate risks related to adopting quantum-safe algorithms. The paper also highlights the importance of collaboration between organizations, hardware vendors, and cryptographic communities to develop robust security solutions. It discusses the impact of quantum computing on digital infrastructure, emphasizing the need for comprehensive security measures to protect against quantum threats. The study concludes that quantum computing presents a long-term threat to encryption, and organizations are actively researching and developing quantum-resistant encryption methods to mitigate these risks. The paper provides a detailed analysis of the threats posed by quantum computing, emphasizing the need for a proactive approach to cybersecurity in the quantum era.