Meanwhile, Proton Mail offers complete anonymity to its users, too. Tutanota strips IP address information from its messages, making it impossible for anyone to trace the message back to the user, at least using the IP. Like Tutanota, Proton Mail’s encryption prevents even Proton Mail itself from decrypting it and reading your messages. It uses OpenPGP, an industry-standard email encryption algorithm that has several weaknesses mentioned above – no encryption of subject lines, and no perfect forward secrecy. Proton Mail also uses end-to-end symmetrical encryption – RSA 2048-bit for user-to-user emails, AES 256-bit for user-to-non-user emails.

Tutanota also encrypts your address book and your calendar. It also offers perfect forward secrecy, meaning hacking a past session doesn’t give a cybercriminal access to future sessions. Even Tutanota can’t decrypt your messages. The service uses the same algorithms as PGP, but encrypts subject lines as well as the email body above that. Hopefully proton releases an update one day, but this is going to have to be good enough for now.Tutanota offers end-to-end symmetrical encryption – RSA 2048-bit for user-to-user emails, AES 128-bit for user-to-non-user emails. So, I can't manage all the appts via outlook but at least I can now see them all together + I know when I get an invite, I just need to go into chrome or my android app to press accept. It's also worth noting that this calendar in outlook will only refresh every 4 hours. If I receive an invite to proton (or I want to send one), I will still need to login via the browser to accept/send the invite. With this approach I was at least able to see my work, uni and personal proton mail calendars all together in outlook Then in outlook right click on other calendars (bottom left below my calendar tick boxes), add calendar, from internet, paste the url In your proton mail calendar go to your settings and 'share outside proton' full access + copy the url link THERE IS A WAY to have read only access to your protonmail calendar via outlook and overlay with your other calendars.

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