ProtonMail Suspects State-Sponsored DDoS Attack
ProtonMail, the end-to-end encrypted e-mail service used by activists, journalists, whistleblowers, and others looking for enhanced privacy, continues to be offline following a powerful and continuous distributed denial of service (DDoS) attack targeting its data center.
Read more: ProtonMail Suspects State-Sponsored DDoS Attack
Story added 6. November 2015, content source with full text you can find at link above.