The Advance Encryption Standard (AES) algorithm is a symmetric block cipher that provides a high level of confusion and diffusion, so it is considered, immune against many known mathematical analysis ...

The algorithm is so strong that no computer imaginable for the foreseeable future—even a quantum computer—would be able to crack a truly random 256-bit AES key.

The US now has four post-quantum cryptographic algorithms it plans to make part of a new set of public-key cryptography standards by 2024.