You might have heard of Proton Mail. An encrypted email service, it's especially popular among activists, journalists, and privacy purists alike who stand by the company's promise to protect their privacy.
This is why the recent news of the Swiss firm disclosing to Spanish authorities the recovery email of a pro-Catalan activist that led to his arrest is likely to have unsettled many Proton Mail users. However, this could have been very easily prevented exactly by the incriminated user.
