Post-Quantum Cryptography (PQC) refers to encryption methods designed to resist attacks from quantum computers. Unlike quantum cryptography, PQC runs on classical systems but solves problems that are hard even for quantum computers.
Classical algorithms like RSA and ECC can be broken by quantum computers.
Algorithms like Shor’s and Grover’s can decrypt today’s encrypted data in the future.
PQC protects data from “harvest now, decrypt later” attacks.