Post Quantum Cryptography
Post Quantum Cryptography involves the development of classical cryptographic algorithms that are assumed to be safe against a quantum computer. These can be Lattice-based, Multivariate-based, or Hash-based cryptographic algorithms, etc. which can withstand certain attacks even from a quantum computer.
Although Post Quantum Cryptography for now spares us some time to be quantum-ready by being robust against certain quantum attacks, it doesn't provide us information-theoretic security and might become unsafe once the quantum algorithms are developed to be able to break them.
Dr. Anindita Banerjee