What is Quantum Encryption? How does it work?

en.wikipedia.org

Post-quantum cryptography

Post-quantum cryptography (PQC), sometimes referred to as quantum-proof, quantum-safe, or quantum-resistant, is the development of cryptographic algorithms (usually public-key algorithms) that are currently thought, but not proven, to be secure against a cryptanalytic attack by a quantum computer. Most widely used public-key algorithms rely on the difficulty of one of three mathematical problems: the integer factorization problem, the discrete logarithm problem, or the elliptic-curve discrete As...

Unfortunately the proper explanation involves some high level mathematics .. and I definitely don’t understand that myself either.

In short: Quantum computers are really good at calculating some things that take traditional computers much longer. This can be an issue for some encryption algorithms. There are ways to change these algorithms so that Quantum computers are losing their speed advantage and that’s what post-quantum cryptography is all about.