Proton
An illustration of Proton Mail's code being examined.

At Proton(nova janela), we believe everyone should be in control of their personal data. A critical component of controlling your data is having the ability to make informed decisions about who you entrust with your data and how it is secured. Most companies rely on security through obscurity and do not share their code, making it impossible for you to accurately assess how secure their service is.

Rather than relying on secrecy to protect our code, we believe in security through transparency, which means we: 

  • Make all our apps open source to leverage the expertise of IT security experts and the Proton community
  • Commission independent security experts to conduct regular audits of our code
  • Share the audit reports with the public

By subjecting our apps to rigorous public examination, we ensure that any potential vulnerabilities are swiftly discovered and resolved. 

We have previously shared the results of the audits for our Proton Mail(nova janela) and Proton VPN(nova janela) apps. Now that we have released the new Proton Mail, including Proton Calendar(nova janela), we would like to share the results of its audit as well.

The new Proton Mail is secure

Like all Proton applications, the new Proton Mail is open source, and anyone can inspect its code for themselves on GitHub(nova janela)

Prior to their release, the source code of both the new Proton Mail and Proton Calendar underwent an extensive security audit. We are happy to announce the final report was overwhelmingly positive, and the audit uncovered no major issues or security vulnerabilities

Read the audit report for the new Proton Mail(nova janela)

This security audit was carried out by Securitum(nova janela), a leading European security auditing company. Securitum currently oversees more than 300 security testing projects every year, including for many top European banks.

Read the latest audit reports for all Proton services

Security through transparency

Proton Mail was founded by scientists who met at the European Organization for Nuclear Research (CERN), and the scientific principles of peer review and transparency are core values of our team. Just as we would not trust a result without first seeing the underlying data, we do not expect you to trust us without being able to examine our work for yourselves. 

If you have questions or comments about the security audit for the new Proton Mail, please share them with us! Join the conversation on Twitter(nova janela) and Reddit(nova janela).

Artigos relacionados

The Earth, a recycling symbol, and a warning sign representing a reminder to back up data on World Backup Day
en
Celebrate World Backup Day by learning from data loss stories, from family heirlooms to $500,000 in Bitcoin, and how to avoid a similar fate.
A desktop computer showing cleanup supplies and Proton apps for digital cleaning
en
  • Guias de privacidade
Take control of your digital life by spring cleaning your inbox, passwords, and cloud storage using Proton's suite of privacy-first tools.
What is ePHI? The difference between PHI and ePHI explained
en
What is the difference between ePHI and PHI, and how can healthcare data can optimally be kept safe as it’s passed from one party to another?
A vial, Erlenmeyer flask, and a DNA double-helix being deleted.
en
  • Guias de privacidade
If you used 23andMe, your data could soon be for sale. Here's how to delete your data from 23andMe — and why you might want to do so sooner than later.
European alternatives to US tech
en
Take back control of your digital life with privacy-focused European alternatives to US Big Tech apps and services.
A badge representing ISO 27001 certification for file sharing
en
  • For business
What is ISO 27001 secure file collaboration? Learn about ISO 27001 certification and how to maintain ISO 27001 compliance for your business.