I wonder why the Crypt module uses Xsalsa20 instead of Chacha20. I’m not a crypto expert but when I’m not mistaken I read that it should be a little bit less secure than Chacha20. Is that true and why is crypt not using Chacha20?
The reason is that is what the NaCl secretbox format gives us.
I think this crypto stackexchage probably answers the why quite well!
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