this post was submitted on 20 Sep 2023
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Privacy
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A nice and reasonable approach.
I just wonder why doubling up the cyphers is the way to go? Not confident in the post-quantum cipher yet?
Yeah they explain it in the article.
There was a "quantum safe" encryption scheme proposed that had a non-quantum vulnerability found in it. Perhaps they are hedging against that occuring again? The scheme was rejected in the end so didnt matter to much.
https://arstechnica.com/information-technology/2022/08/sike-once-a-post-quantum-encryption-contender-is-koed-in-nist-smackdown/
Google is also going with a combined approach: https://security.googleblog.com/2023/08/toward-quantum-resilient-security-keys.html
New ones are too young and not battle tested with time. Hybrid PQ is the norm until more data is available.