ProtonMail will use encryption to lock down your contacts list

ProtonMail will use encryption to lock down your contacts list

The service works within ProtonMail’s email system, and includes both zero access encryption (which means that even ProtonMail won’t know what’s stored on their servers) and digital signature verification (which makes sure no one else has tampered with your data). You can encrypt specific fields of your contact data, including phone numbers and note fields. …