Schneier - Update on NIST's Post-Quantum Cryptography Program

NIST has posted an update on their post-quantum cryptography program:

After spending more than three years examining new approaches to encryption and data protection that could defeat an assault from a quantum computer, the National Institute of Standards and Technology (NIST) has winnowed the 69 submissions it initially received down to a final group of 15. NIST has now begun the third round of public review. This "selection round" will help the agency decide on the small subset of these algorithms that will form the core of the first post-quantum cryptography standard.

[...]

For this third round, the organizers have taken the novel step of dividing the remaining candidate algorithms into two groups they call tracks. The first track contains the seven algorithms that appear to have the most promise.

"We're calling these seven the finalists," Moody said. "For the most part, they're general-purpose algorithms that we think could find wide application and be ready to go after the third round."

The eight alternate algorithms in the second track are those that either might need more time to mature or are tailored to more specific applications. The review process will continue after the third round ends, and eventually some of these second-track candidates could become part of the standard. Because all of the candidates still in play are essentially survivors from the initial group of submissions from 2016, there will also be future consideration of more recently developed ideas, Moody said.

"The likely outcome is that at the end of this third round, we will standardize one or two algorithms for encryption and key establishment, and one or two others for digital signatures," he said. "But by the time we are finished, the review process will have been going on for five or six years, and someone may have had a good idea in the interim. So we'll find a way to look at newer approaches too."

Details are here. This is all excellent work, and exemplifies NIST at its best. The quantum-resistant algorithms will be standardized far in advance of any practical quantum computer, which is how we all want this sort of thing to go.



from Schneier on Security https://www.schneier.com/blog/archives/2020/07/update_on_nists.html

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