I'd like to have the possibility to only import my subkeys to ProtonMail, and use them to encrypt and sign.
It has became a deal breaker for me as I would like to setup rolling subkeys, and keep my private master key offline, off-computer, on an encrypted usb media device.
I do not trust the hardware I read my mails on, nor I trust my ProtonMail password to be as secure as the encrypted usb key under my pillow.
The ability to manage expiration date efficiently with subkeys is one big security advantage of PGP.
I'd like to have the possibility to only import my subkeys to ProtonMail, and use them to encrypt and sign.
It has became a deal breaker for me as I would like to setup rolling subkeys, and keep my private master key offline, off-computer, on an encrypted usb media device.
I do not trust the hardware I read my mails on, nor I trust my ProtonMail password to be as secure as the encrypted usb key under my pillow.
The ability to manage expiration date efficiently with subkeys is one big security advantage of PGP.