Authors - D.M. Jarathne, K. A. Dilini T. Kulawansa Abstract - The cryptographic systems underlying the digital infrastructure of the world present an existential risk to quantum computing. With wide deployment of cryptographically relevant quantum computers, many commonly deployed asymmetric encryption algorithms including RSA and elliptic curve cryptography will be subject to attack through quantum algorithms such as the Shor algorithm. The present systematic literature review examines the feasible and scalable migration plans to deploy enterprise systems and critical infrastructure to post-quantum cryptography. The review explores migration frameworks, implementation issues, practical implementation, and organization strategic recommendations based on the analysis of fifteen selected sources, including research articles and technical standards. The review notes that there are four basic stages of migration which include diagnosis, planning, execution, and maintenance. No-table obstacles are organizational issues, technological constraints, system over-load, and industry-specific demands. Practical examples of successful migrations between web servers, databases, blockchain architectures, and messaging systems have been reported, and hybrid cryptographic solutions have become the most common transitional practice.
