Version 0.4.2 of package Autocrypt has just been released in GNU ELPA.
You can now find it in M-x list-packages RET.
Autocrypt describes itself as:
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Autocrypt implementation
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More at https://elpa.gnu.org/packages/autocrypt.html
## Summary:
Implementation of Autocrypt (https://autocrypt.org/) for various
Emacs MUAs.
## Recent NEWS:
[Not provided 🙁]