8 Post-Quantum Cryptography
As we described in Chapter 7 Quantum Computing, a sufficiently large quantum computer implementing Shor’s algorithm would break our currently deployed public key algorithms. However, long before that can happen, the world will (hopefully) have converted to replacement algorithms. The replacement algorithms will be based on math problems that (hopefully) not even a combination of classical and quantum computers would be able to solve in a reasonable amount of time.
These new algorithms are known by several equivalent names: quantum-resistant, quantum-safe, or post-quantum cryptography (PQC). The world seems to have settled on the term post-quantum, so that is what we will use, even though we have noticed that the term ...
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