Richard P. Feynman.
Throughout the 19th century, scientists’ understanding of the atomic model was beginning to shift towards the concept of subatomic particles like neutrons, electrons, and protons and their corresponding characteristics.
Fast forward to 21st century, Google's quantum processor named Sycamore having 53 qubits reaches quantum supremacy by performing a series of operations in 200 seconds that would take a supercomputer about 10,000 years to complete.
Cryptography is an essential component of both quantum computing and blockchain. The blockchain systems we have today will be outdated once quantum computers are commercially available on the market and become mainstream.
QRNGscreate randomness by measuring quantum processes, which are, by nature fully non-deterministic.
QKD is a secure communication method which implements a cryptographic protocol involving components of quantum mechanics. It uses quantum superpositions or quantum entanglement to transmit information in quantum states.
PQC refers to cryptographic algorithms (usually public-key algorithms) that are secure against a cryptanalytic attack by a quantum computer.