Your web browser is the vehicle that carries you around the Internet to your desired websites. As such, it knows precisely what sites you have visited, how long you spent browsing them, and what you clicked on (or almost clicked on). Anyone who has access to your web browser can have a window into your …

After the success of last year’s auction, we are selling three more Proton Lifetime Accounts this year to benefit organizations worthy of our community’s support. The auctions will take place on eBay and will start next week at 12 PM Central European Time on Dec. 18 and run until Dec. 25. If you’re interested in …

This article documents ProtonCalendar’s security model and illustrates how our product protects calendar-related sensitive data. We examine the advantages and limitations of our approach. This document is somewhat technical, discussing how encryption protects the different layers of data. Still, it is meant to be accessible to a general audience and attempts to explain how ProtonCalendar …

The European Commission recently submitted proposals for new rules governing how e-evidence is gathered by law enforcement agencies. E-evidence would include things like emails, messages, and other data related to a possible crime or investigation. It is certainly important that law enforcement can gather evidence and conduct thorough criminal investigations. However, just as there are …

Update Nov. 30, 2019: Because ProtonMail only offers discounts once per year, we have decided to extend our Black Friday promotion until 11:59 PM on Dec. 8, 2019, San Francisco time. (That’s 2:59 AM Dec. 9 in New York and 8:59 AM Dec. 9 in Geneva, Switzerland.) This extension will give anyone who wasn’t able …

UPDATE Nov. 19, 2019: We have recently confirmed that our users in Belarus can access ProtonMail and ProtonVPN once again. While there has been no official communication as to why ProtonMail and ProtonVPN were unblocked (or why we were blocked in the first place), public outcry seems to have played a part. Both Roskomsvoboda, a …

IT security is crucial to success in today’s economy. A data breach can cost you time, money, and your customers’ trust. Yet, due to a lack of funding, time, and expertise, most small- and medium-sized businesses (SMEs) are unprepared to deal with basic cyber threats. As a result, most victims of data breaches are small …

We’re happy to announce that the ProtonMail iOS app is now fully open source.  We believe in transparency, the power of community, and building a more private and secure future for all. That’s why our web app has been open source since 2015, and it’s why we have contributed to the open source community by …

This post documents ProtonMail’s iOS security model and illustrates how our application protects sensitive data on client iOS devices. The advantages and limitations of this approach are discussed, and the source code can be viewed here. You can also ProtonMail’s iOS open source announcement. You can also read our previously published ProtonMail threat model, which …

One of the unique innovations of the ProtonMail iOS app is the AppKey Protection System. This is an extra layer of encryption on top of Apple’s built-in local encryption that protects sensitive Proton data stored on your device. When you have AppKey Protection System enabled, your ProtonMail data is more secure against malware from hackers …

Today we’re unveiling our biggest redesign ever. Not only does ProtonMail Version 4.0 look more modern on the surface, it’s part of our ongoing transition to a newer software framework that lays the foundation for future features, new products, and better customization.  You can start using the ProtonMail Version 4.0 beta right now. It’s open …

Since we launched in 2014, ProtonMail has been the preferred email service provider for activists around the world. Protecting freedom of speech and democracy is, after all, one of the main reasons we created ProtonMail in the first place. Normally, this would not be of particular interest to anyone: we have always believed that all …