Quantum computers are super-computers that can perform intense calculations & processing, in such a manner — that existing cryptography keys used for encryption can be more readily “cracked”.  NIST is preparing more advanced standards slated for 2024 allowing GOVT & other agencies a time frame to accomplish migration.

Preparing Critical Infrastructure for Post-Quantum Cryptography | CISA

CISA Insights: Preparing Critical Infrastructure for Post-Quantum Cryptography

CISA has released CISA Insights: Preparing Critical Infrastructure for Post-Quantum Cryptography, which outlines the actions that critical infrastructure stakeholders should take now to prepare for their future migration to the post-quantum cryptographic standard that the National Institute of Standards and Technology (NIST) will publish in 2024.    CISA strongly urges critical infrastructure stakeholders follow the recommendations in the Insights now to ensure a smooth migration to the post-quantum cryptography standard.