The US  National Security Agency (NSA) has produced a rather interesting PDF FAQ on post-quantum cryptography, which can be found at

https://media.defense.gov/2021/Aug/04/2002821837/-1/-1/1/Quantum_FAQs_20210804.PDF

I'm sorry for not catching this and sharing it more promptly. There is also some press coverage here:

https://www.theregister.com/2021/09/01/nsa_quantum_computing_faq/

Clifford Lynch
Director, CNI