  Quantum computer is no longer a hypothetical idea. It is the worlds most
important technology and there is a race among countries to get supremacy in
quantum technology. Its the technology that will reduce the computing time from
years to hours or even minutes. The power of quantum computing will be a great
support for the scientific community. However, it raises serious threats to
cybersecurity. Theoretically, all the cryptography algorithms are vulnerable to
attack. The practical quantum computers, when available with millions of qubits
capacity, will be able to break nearly all modern public-key cryptographic
systems. Before the quantum computers arrive with sufficient qubit capacity, we
must be ready with quantum-safe cryptographic algorithms, tools, techniques,
and deployment strategies to protect the ICT infrastructure. This paper
discusses in detail the global effort for the design, development, and
standardization of various quantum-safe cryptography algorithms along with the
performance analysis of some of the potential quantum-safe algorithms. Most of
the quantum-safe algorithms need more CPU cycles, higher runtime memory, and
large key size. The objective of the paper is to analyze the feasibility of the
various quantum-safe cryptography algorithms.
