Proton, the Swiss privacy-focused software maker, says it has received a notice of a "possible block" of Proton Mail in India after the service was used Proton, the maker of privacy-focused email service Proton Mail, has received a notice of "possible block" in India and condemned the action.
They don’t need the content anyway, just metadata.
ProtonMail uses PGP encryption to encrypt emails, which means your meta data, including subject line is vulnerable to data collection. Also there is no forward secrecy with current PGP standard. See quotes from below:
We have built Proton Mail with PGP fully integrated, … All messages between Proton Mail users are automatically end-to-end encrypted.
PGP (especially for email) exposes much more info to outside party than any good communication protocol, like the signal protocol or OMEMO used by XMPP.
ProtonMail uses PGP encryption to encrypt emails, which means your meta data, including subject line is vulnerable to data collection. Also there is no forward secrecy with current PGP standard. See quotes from below:
https://proton.me/support/how-to-use-pgp
https://proton.me/support/proton-mail-encryption-explained
PGP (especially for email) exposes much more info to outside party than any good communication protocol, like the signal protocol or OMEMO used by XMPP.