Crypto                   ProtonMail + WKD = <3         14 September 2023


   Today, I unexpectedly discovered that ProtonMail can automatically
   encrypt emails for recipients who have WKD (which stands for "Web Key
   Directory") set up.  This feature allows email clients
   to automatically retrieve copies of PGP public keys over the HTTPS
   protocol.

   In other words, if someone uses ProtonMail and wants to send me
   an email, ProtonMail will recognise that I have a PGP key, retrieve
   its public portion using WKD, and encrypt the email before sending
   it.  Consequently, I'd receive an email encrypted specifically
   for me.





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