Proton Mail Explained

Proton Mail
Country:Plan-les-Ouates, Switzerland[1]
Commercial:No
Num Users:100 million (April 2023)[2]
Registration:Required
Language:English, Catalan, Chinese, Dutch, French, German, Hungarian, Italian, Japanese, Polish, Romanian, Russian, Spanish, Turkish, Portuguese, Ukrainian
Owner:Proton AG
Current Status:Online
Web Client
License:GNU GPLv3[3] [4] [5] [6]
Programming Language:TypeScript and Go

Proton Mail (previously written as ProtonMail) is a Swiss end-to-end encrypted email service founded in 2013 headquartered in Plan-les-Ouates, Switzerland.[7] It uses client-side encryption to protect email content and user data before they are sent to Proton Mail servers, unlike other common email providers such as Gmail and Outlook.com.[8] The service can be accessed through a webmail client, the Tor network, Windows, macOS and Linux (beta) desktop apps[9] and iOS and Android apps.[10]

Proton Mail is run by Proton AG (formerly Proton Technologies), which is based in Plan-les-Ouates, Switzerland. The company also operates Proton VPN, Proton Drive, Proton Calendar and Proton Pass. Proton Mail received initial funding through a crowdfunding campaign. Although the default account setup is free, the service is sustained by optional paid services. Initial membership was by invitation only; however, beginning in March 2016, Proton Mail was opened to the public. Acquiring more than two million users by 2017,[11] membership grew to almost 70 million by 2022.[12]

History

On May 16, 2014, Proton Mail entered into public beta.[13] It was met with enough response that after three days they needed to temporarily suspend beta signups to expand server capacity.[14] Two months later, Proton Mail received from 10,576 donors through a crowdfunding campaign on Indiegogo, while aiming for .[15] During the campaign, PayPal froze Proton Mail's PayPal account, thereby preventing the withdrawal of worth of donations. PayPal stated that the account was frozen due to doubts of the legality of encryption, statements that opponents said were unfounded.[16] [17] The restrictions were lifted the following day.[18]

On March 18, 2015, Proton Mail received from the non-profit Fondation Genevoise pour l'Innovation Technologique (FONGIT) and Charles River Ventures, although by 2022, the company no longer had venture capital investors.[19] [20] On August 14, 2015, Proton Mail released major version 2.0, which included a rewritten codebase for its web interface. On 17 March 2016, Proton Mail released major version 3.0, which saw the official launch of Proton Mail out of beta. With a new interface for the web client, version 3.0 also included the public launch of Proton Mail's iOS and Android beta applications.[21]

On January 19, 2017, Proton Mail announced a Tor onion site.[22] On November 21, 2017, Proton Mail introduced Proton Mail Contacts, a zero-access encryption contacts manager. Proton Mail Contacts also utilizes digital signatures to verify the integrity of contacts data.[23] On 6 December 2017, Proton Mail launched Proton Mail Bridge, an application that provides end-to-end email encryption to any desktop client that supports IMAP and SMTP, such as Microsoft Outlook, Mozilla Thunderbird, and Apple Mail, for Windows and MacOS.[24]

On July 25, 2018, Proton Mail introduced address verification and Pretty Good Privacy (PGP) support, making Proton Mail interoperable with other PGP clients.[25]

The source code for the back-end remains closed source.[26] [27] However, Proton Mail released the source code for the web interface under an open-source license.[28] Proton Mail also open sourced their mobile clients for iOS and Android,[29] [30] as well the Proton Mail Bridge app.[31]

In September 2020, Proton Mail helped found the Coalition for App Fairness, which aims to gain better conditions for the inclusion of their apps in app stores.[32] Proton also founded the Coalition for Competitive Digital Markets, which brings together 50+ European tech companies supporting open, interoperable and competitive digital markets.[33]

In May 2022, Proton AG updated the visuals, user interface, and logos of all its products, including Proton Mail, to achieve a consistent design throughout its software. Proton Mail's subscription now includes access to all Proton VPN, Proton Calendar, Proton Drive and Proton Pass.[34]

In April 2024, Proton Mail launched a desktop app for Windows and macOS. A version for Linux is in beta.[35] [36] The desktop client is only available for users with a paying subscription, despite Proton AG's earlier comments that it would be "gradually be made available to all users, including free".[37] The app also allows access to Proton Calendar.[38]

In June 2024, Proton started the transition to becoming a non-profit.[39]

In July 2024, Proton launched Proton Docs, a document editor & Proton Wallet.[40] [41]

Services offered

(Launched)

Proton Mail - An email provider (May 16, 2014)[42]

Proton Calendar - A Calendar

Proton VPN - A Virtual Private Network (2017)

Proton Drive - A cloud Storage (September 22, 2022)[43]

Proton Pass - A password Manager (June 28, 2023)[44]

Proton Docs - A Document Editor - (July 3, 2024)[45]

Proton Wallet - A self-custody wallet (July 24, 2024)[46]

Encryption

Proton Mail uses a combination of public-key cryptography and symmetric encryption protocols to offer end-to-end encryption. When a user creates a Proton Mail account, their browser generates a pair of public and private RSA keys:

This symmetrical encryption happens in the user's web browser using AES-256. Upon account registration, the user is asked to provide a login password for their account.

Proton Mail also offers users an option to log in with a two-password mode that requires a login password and a mailbox password.

Upon logging in, the user has to provide both passwords. This is to access the account and the encrypted mailbox and its private encryption key. The decryption takes place client-side either in a web browser or in one of the apps. The public key and the encrypted private key are both stored on Proton Mail servers. Thus Proton Mail stores decryption keys only in their encrypted form so Proton Mail developers are unable to retrieve user emails or reset user mailbox passwords.[47] This system absolves Proton Mail from:

Proton Mail exclusively supports HTTPS and uses TLS with ephemeral key exchange to encrypt all Internet traffic between users and Proton Mail servers.

In September 2015, Proton Mail added native support to their web interface and mobile app for PGP. This allows a user to export their Proton Mail PGP-encoded public key to others outside of Proton Mail, enabling them to use the key for email encryption. The Proton Mail also supports PGP encryption from Proton Mail to outside users.[49]

Email sending

An email message sent from one Proton Mail account to another is automatically encrypted with the public key of the recipient. Once encrypted, only the private key of the recipient can decrypt the message. When the recipient logs in, their mailbox password decrypts their private key and unlocks their inbox.

Email messages sent from Proton Mail to non-Proton Mail email addresses may optionally be sent in plain text or with end-to-end encryption. With encryption, the message is encrypted with AES under a user-supplied password. The recipient receives a link to the Proton Mail website on which they can enter the password and read the decrypted message. Proton Mail assumes that the sender and the recipient have exchanged this password through a backchannel. Such email messages can be set to self-destruct after a period of time.[50]

Masked email

In 2022 ProtonMail acquired SimpleLogin, a company based in Paris, France that provides masked email addresses. SimpleLogin functionality is integrated into Proton Mail, but the masked mail service is also available independently to use with any email provider.[51] [52]

Location and security

Both Proton Mail and Proton VPN are located in Switzerland. The company claims that it is also located in Switzerland because of its strict privacy laws.[53]

As of October 2022 Proton Mail currently supports two-factor authentication with TOTP tokens or U2F security keys, like YubiKeys, for its login process.[54] [55]

In 2021 Nadim Kobeissi published an article arguing that as Proton Mail was generally accessed through a web client, "no end-to-end encryption guarantees have ever been provided by the Proton Mail service."[56]

In 2021, Proton Mail's security and cryptographic architecture were both independently audited by Securitum, a leading European security auditing company, who uncovered no major issues or security vulnerabilities, and the audit results were publicly published.[57]

Data portability

Proton Mail limits data portability by locking support for external email client software through IMAP and POP3 protocols behind a paywall.

Data centers

Proton Mail maintains four data centers[58], one in Lausanne and another in Attinghausen (in the former K7 military bunker under 1000m (3,000feet) of granite) as a backup.

Each data center uses load balancing across web, mail, and SQL servers, redundant power supply, hard drives with full disk encryption, and exclusive use of Linux and other open-source software. In December 2014, Proton Mail joined the RIPE NCC in an effort to have more direct control over the surrounding Internet infrastructure.[59]

DDoS attacks

From November 3–7, 2015, Proton Mail was under several DDoS attacks that made the service largely unavailable to users.[60] During the attacks, the company stated on Twitter that it was looking for a new data center in Switzerland, saying, "many are afraid due to the magnitude of the attack against us".[61]

In July 2018, Proton Mail reported it was once more suffering from DDoS attacks. CEO Andy Yen claimed that the attackers had been paid by an unknown party to launch the attacks.[62] In September 2018, one of the suspected Proton Mail attackers was arrested by British law enforcement and charged in connection with a series of other high-profile cyberattacks against schools and airlines.[63]

Reception

Technological reviews of Proton Mail are generally positive. IT Pros review scores it 4 out of 5 stars. It lauds the end-to-end encryption of emails, including for non-Proton Mail users, a robust security, and the interfaces of both the web and mobile versions of the email client, with criticisms of the client's search function and the service's price versus the competition.[64] PCMag also rates the service 4 out of 5 stars, praising the security, in addition to loading embedded images without returning the IP address to senders and setting expirations for messages, but questioning the cap on daily messages even with a subscription.[65] TechRadar gives the service 4.5 out of 5 stars, calling it one of the best secure email services, although it noted limitations such as that it is not suited for voluminous messaging, the reluctance of websites to adopt the service, and that email subject lines are not encrypted.[66]

Proton Mail was the recipient of three Lovie Awards, one gold and The People's Lovie in 2016,[67] and one silver in 2017.[68]

Blocks

Belarus

On November 15, 2019, Proton confirmed that the government of the Republic of Belarus had issued a block across the country of Proton Mail and Proton VPN IP addresses. The block was no longer in place four days later. No explanation was given to Proton Mail for the block, nor for the block being lifted.[69]

Russia

On January 29, 2020, the Russian Federal Service for Supervision of Communications, Information Technology and Mass Media reported that it had implemented a complete block of Proton Mail services within the Russian Federation.[70] As a reason for the block, it cited Proton Mail's refusal to give up information relating to accounts that allegedly sent out spam with terror threats.[71] [72] However, Proton Mail claimed that it did not receive any requests from Russian authorities regarding any such accounts.[73] [74] In response to the block, the Proton Mail Twitter account recommended legitimate users circumvent the block via VPNs or Tor.

In March 2020, the company announced that even though the Russia ban was not particularly successful, and the service continues to be largely available in Russia without using a VPN, Proton Mail will be releasing new anti-censorship features in both Proton Mail and Proton VPN desktop and mobile apps which will allow more block attempts to be automatically circumvented.[75]

Compliance with Swiss court orders

According to Proton Mail's transparency report, it is legally obligated to follow Swiss court orders if Swiss law is broken. In 2020, Proton Mail received 3,572 orders from Swiss authorities and contested 750 of them.[76] Due to the encryption utilized, Proton Mail is unable to hand over the contents of encrypted emails under any circumstances, but according to Proton's privacy policy, Proton Mail can be legally compelled to log IP addresses as part of a Swiss criminal investigation.[77] For this reason, the company strongly suggests that users who need to hide their identity from the Swiss government use their Tor hidden service/onion site. In May 2022, Proton updated its privacy policy and made explicit a separate privacy policy for its Proton VPN service, which has a different treatment under Swiss law and has a strict no-logs policy which was also confirmed by an external audit.[78]

Notable cases involving Swiss court orders include a case involving death threats made against immunologist Anthony Fauci and a case against French climate activists.[79] [80] After these cases, Proton Mail won an important Swiss court victory in October 2021 that confirmed that email services cannot be considered telecommunications providers, and consequently are not subject to the data retention requirements imposed on telecommunications providers.[81] In May 2024, Proton was reported having disclosed personal data of a person involved in Catalan independence activism and accused of a felony by the Spanish authorities.[82]

Account types

As of September 22, 2023, Proton Mail offers the following account types for individuals:[83] [84]

Account typeMessages per dayStorageAliasesCustom domainsPriceSupport
Proton Free1501 GB*1 Address-FreeLimited Support
Mail PlusUnlimited15 GB10 Addresses1€4.99 /mo or €47.88 /yr or €83.76 /2yrPriority Support
Proton UnlimitedUnlimited500 GB15 Addresses3€12.99 /mo or €119.88 /yr or €191.76 /2yrPriority Support
Proton FamilyUnlimited3 TB90 Addresses3€29.99 /mo or €287.88 /yr or €479.76 /2yrPriority Support

*The default Proton Mail free storage is 500 MB that users can increase to 1GB if they meet certain criteria.

As of September 22, 2023, Proton Mail offers the following account types for businesses:[85]

Account typeStorageAliasesCustom domainsPriceHide My Email aliases
Mail Essentials15 GB10 Address3€6.99 /mo-
Business500 GB15 Addresses10€10.99 /moUnlimited
EnterpriseCustomizableCustomizableCustomizableCustomizableCustomizable

See also

Notes and References

  1. Web site: Privacy policy . May 28, 2022 . September 5, 2021 . https://web.archive.org/web/20210905222006/https://protonmail.com/privacy-policy . live .
  2. Web site: There are now over 100 million Proton Accounts. Yen. April 18, 2023. proton.me. December 18, 2023. https://web.archive.org/web/20230418121406/https://proton.me/blog/proton-100-million-accounts. April 18, 2023. live.
  3. Web site: iOS mobile app repository . Proton AG . github.com/ProtonMail/ios-mail . 2024-05-25 . November 1, 2019 . https://web.archive.org/web/20191101014156/https://github.com/ProtonMail/ios-mail . live .
  4. Web site: Android mobile app repository . Proton AG . github.com/ProtonMail/android-mail . 2024-05-25 . May 26, 2024 . https://web.archive.org/web/20240526030333/https://github.com/ProtonMail/android-mail . live .
  5. Web site: Proton bridge repository . Proton AG . github.com/ProtonMail/proton-bridge . 2024-05-25 . April 17, 2020 . https://web.archive.org/web/20200417155622/https://github.com/ProtonMail/proton-bridge . live .
  6. Web site: LICENSE . Proton AG . github.com/ProtonMail/WebClient . 25 December 2021 . 2024-05-25 . December 25, 2021 . https://web.archive.org/web/20211225204217/https://github.com/ProtonMail/WebClients/blob/main/LICENSE . live .
  7. Web site: CERN inspires entrepreneurs for email encryption. 23 May 2014. 22 May 2020. CERN. O'Luanaigh. Cian. May 16, 2020. https://web.archive.org/web/20200516183708/https://home.cern/news/news/computing/cern-inspires-entrepreneurs-email-encryption. live.
  8. Book: Saxena. Kumkum. Rajdev. Dev. Bhatia. Divesh. Bahl. Manav. 2021 International Conference on Communication information and Computing Technology (ICCICT) . ProtonMail: Advance Encryption and Security . 25–27 June 2021. 1–6 . 10.1109/ICCICT50803.2021.9510041. 978-1-6654-0430-3 . 237000409.
  9. Web site: 2024-03-14 . Introducing the Proton Mail desktop app . 2024-04-01 . Proton . en . April 1, 2024 . https://web.archive.org/web/20240401234533/https://proton.me/blog/proton-mail-desktop-app . live .
  10. Web site: ProtonMail, the Easy-to-Use Encrypted Email Service, Opens Up to the Public. 17 March 2016. March 18, 2016. July 2, 2016. https://web.archive.org/web/20160702081550/http://motherboard.vice.com/en_ca/read/protonmail-the-easy-to-use-encrypted-email-service-opens-up-to-the-public. live.
  11. Web site: Fighting Censorship with Proton Mail Encrypted Email Over Tor. 19 January 2017. Proton Mail Blog. 20 January 2017. May 28, 2022. https://web.archive.org/web/20220528174448/https://proton.me/news/tor-encrypted-email. live.
  12. Edelman . Gilad . 25 May 2022 . Proton Is Trying to Become Google—Without Your Data . en-US . Wired . 2022-05-27 . 1059-1028 . September 30, 2023 . https://web.archive.org/web/20230930162549/https://www.wired.com/story/proton-mail-calendar-drive-vpn/ . live .
  13. Web site: 8 June 2021 . Proton Mail Unveils an Overdue Makeover and New Features . 2021-07-06 . Gizmodo . en-us . April 7, 2022 . https://web.archive.org/web/20220407210725/https://gizmodo.com/protonmail-unveils-an-overdue-makeover-and-new-features-1847054759 . live .
  14. Web site: Über-Secure ProtonMail Beta Maxes Out Servers in Just 60 Hours. 22 May 2014. Infosecurity Magazine. 19 October 2015. November 7, 2018. https://web.archive.org/web/20181107132843/https://www.infosecurity-magazine.com/news/uber-secure-protonmail-beta-maxes-out-servers-in/. live.
  15. Web site: 29 July 2014 . Proton Mail raises a record $500,000 through crowdfunding to disrupt the state of email communications . live . https://web.archive.org/web/20231203104037/https://proton.me/blog/protonmail-raises-a-record-500000-through-crowdfunding-to-disrupt-the-state-of-email-communications . 3 December 2023 . 13 May 2024 . Proton . en . Proton Mail’s crowdfunding campaign has surged past $500,000 with the support of over 10,000 backers.
  16. Web site: ProtonMail hit by PayPal account freeze. Halfacree. Gareth. 1 July 2014. bit-tech. 19 October 2015. November 20, 2018. https://web.archive.org/web/20181120045408/https://bit-tech.net/news/tech/software/protonmail-paypal/1/. live.
  17. Web site: Howell O'Neill . Patrick . 1 July 2014 . PayPal freezes account of email encryption startup Proton Mail [Update] ]. 19 October 2015 . . June 18, 2019 . https://web.archive.org/web/20190618155918/https://www.dailydot.com/layer8/paypal-protonmail-freeze/ . live .
  18. Web site: Yen . Andy . 30 June 2014 . Paypal Freezes Proton Mail Campaign Funds . 19 October 2015 . Proton Mail Blog . May 28, 2022 . https://web.archive.org/web/20220528174444/https://proton.me/news/paypal-freezes-protonmail-campaign-funds . live .
  19. Web site: 18 March 2015 . Proton Mail has raised $2M USD . 19 October 2015 . startupticker.ch . June 14, 2022 . https://web.archive.org/web/20220614001116/https://www.startupticker.ch/en/news/march-2015/protonmail-has-raised-2m-usd . live .
  20. Web site: Meet the Proton team. 25 May 2022. Proton. 28 May 2022. October 10, 2023. https://web.archive.org/web/20231010031004/https://proton.me/about/team. live.
  21. Web site: 17 March 2016 . Announcement: Proton Mail has launched worldwide! . 21 July 2016 . Proton Mail Blog . May 28, 2022 . https://web.archive.org/web/20220528174441/https://proton.me/news/protonmail-launch-worldwide . live .
  22. Web site: Martin . Alexander J. . 19 January 2017 . Proton Mail launches Tor hidden service to dodge totalitarian censorship . dead . https://web.archive.org/web/20170120080052/http://www.theregister.co.uk/2017/01/19/protonmail_launches_tor_hidden_service/ . 20 January 2017 . The Register.
  23. Web site: 21 November 2017 . Introducing Proton Mail Contacts – the world's first encrypted contacts manager . Proton Mail Blog . May 28, 2022 . May 28, 2022 . https://web.archive.org/web/20220528174437/https://proton.me/news/encrypted-contacts-manager . live .
  24. Web site: Introducing Proton Mail Bridge, email encryption for Outlook, Thunderbird, and Apple Mail. M.. Irina. 6 December 2017. Proton Mail Blog. 16 December 2017. May 28, 2022. https://web.archive.org/web/20220528174440/https://proton.me/news/thunderbird-outlook-encrypted-email. live.
  25. News: 25 July 2018 . Introducing Address Verification and Full PGP Support - Proton Mail Blog . en-US . Proton Mail Blog . 28 September 2018 . May 28, 2022 . https://web.archive.org/web/20220528174442/https://proton.me/news/address-verification-pgp-support . live .
  26. 1309380464118030342. Protonmail. @TheEvanCarroll That is correct. We don't have a stand-alone back-end that can be installed for small deployment, because our backend software is optimized for large deployments with millions of users and distributed infrastructure.. Proton Mail. ProtonMail. 25 September 2020. 11 September 2021. en. https://web.archive.org/web/20210710030151/https://twitter.com/ProtonMail/status/1309380464118030342. 10 July 2021. live.
  27. Web site: 2 April 2019 . Proton Mail responds on Reddit . We don't plan to open source the back-end code, because it doesn't add trust (users can't verify what code is running on the backend) and doing so would given away information about how we do anti-spam and anti-abuse. . September 24, 2020 . November 14, 2020 . https://web.archive.org/web/20201114071230/https://www.reddit.com/r/ProtonMail/comments/b847n7/it_has_been_7_months_since_protonmail_said_we_are/ejysilb/ . live .
  28. Web site: 13 August 2015 . Proton Mail goes Open Source with version 2.0 . 31 January 2016 . Proton Mail Blog . May 28, 2022 . https://web.archive.org/web/20220528174439/https://proton.me/news/protonmail-secure-email-open-source . live .
  29. Web site: 2019-10-30 . Proton Mail iOS app is open source . 2019-12-12 . Proton Mail Blog . en-US . May 28, 2022 . https://web.archive.org/web/20220528174450/https://proton.me/news/ios-open-source . live .
  30. Web site: 2020-04-23 . The Proton Mail Android app is open source . 2020-04-24 . Proton Mail Blog . en-US . May 28, 2022 . https://web.archive.org/web/20220528174434/https://proton.me/news/android-open-source . live .
  31. Web site: 2020-04-15 . Proton Mail Bridge is open source on macOS, Windows, and Linux . 2020-04-24 . Proton Mail Blog . en-US . May 28, 2022 . https://web.archive.org/web/20220528174438/https://proton.me/news/bridge-open-source . live .
  32. Web site: Amadeo. Ron. 2020-09-24. Epic, Spotify, and others take on Apple with "Coalition for App Fairness". 2020-09-26. Ars Technica. en-us. September 24, 2020. https://web.archive.org/web/20200924195429/https://arstechnica.com/gadgets/2020/09/epic-spotify-and-others-take-on-apple-with-coalition-for-app-fairness/. live.
  33. Web site: Coalition for Competitive Digital Markets. 2021-10-21. Coalition for Competitive Digital Markets. en-US. 2022-05-28. May 29, 2022. https://web.archive.org/web/20220529092055/https://competitivedigitalmarkets.eu/. live.
  34. Web site: Khalili . Joel . Proton Mail rebrands as Proton: VPN, email, calendar, cloud storage and password manager now available under one bundle . 23 June 2022 . TechRadar . 25 May 2022 . June 23, 2022 . https://web.archive.org/web/20220623204202/https://www.techradar.com/news/protonmail-rebrands-as-proton-vpn-email-and-cloud-storage-now-available-under-one-bundle . live .
  35. Web site: Khalid . Amrita . 2023-12-14 . Proton Mail finally gets a desktop app for encrypted email and calendar . 2024-04-01 . The Verge . en . April 1, 2024 . https://web.archive.org/web/20240401234532/https://www.theverge.com/2023/12/14/24000696/proton-mail-desktop-app-mac-windows-encrypted . live .
  36. Web site: Sneddon . Joey . 2024-03-14 . Proton Mail's New Desktop App is Available for Linux . 2024-04-01 . OMG! Ubuntu . en-GB . April 1, 2024 . https://web.archive.org/web/20240401234531/https://www.omgubuntu.co.uk/2024/03/proton-mail-desktop-app-linux . live .
  37. Web site: Sawers . Paul . 2024-03-14 . Proton Mail desktop app officially launches, but remains for premium subscribers only . 2024-04-01 . TechCrunch . en-US . April 1, 2024 . https://web.archive.org/web/20240401234531/https://techcrunch.com/2024/03/14/proton-mail-desktop-mac-windows-linux-premium-paying-users/ . live .
  38. Web site: Jawad . Usama . 2024-03-14 . Proton Mail's desktop app is now generally available for Windows and Mac . 2024-04-01 . XDA Developers . en . March 17, 2024 . https://web.archive.org/web/20240317041046/https://www.xda-developers.com/proton-mails-desktop-available-windows-mac/ . live .
  39. Web site: 2024-06-17 . Proton is transitioning towards a non-profit structure . 2024-07-24 . Proton . en.
  40. Web site: 2024-07-03 . Proton just launched a privacy-focused alternative to Google Docs . live .
  41. Web site: 2024-07-24 . Introducing Proton Wallet – a safer way to hold Bitcoin . 2024-07-24 . Proton . en.
  42. Web site: Ropek . Lucas . 2021-06-08 . ProtonMail Unveils an Overdue Makeover and New Features . 2024-07-24 . Gizmodo . en-US.
  43. Web site: 2022-09-22 . We’re launching Proton Drive, the encrypted cloud storage for everyone . 2024-07-24 . Proton . en.
  44. Web site: 2023-06-28 . Introducing Proton Pass – Protecting your passwords and online identity . 2024-07-30 . Proton . en.
  45. Web site: 2024-07-03 . Introducing Docs in Proton Drive – collaborative document editing that’s actually private . 2024-07-24 . Proton . en.
  46. Web site: 2024-07-24 . Introducing Proton Wallet – a safer way to hold Bitcoin . 2024-07-24 . Proton . en.
  47. Web site: Stockman . Jason . 22 May 2014 . How are Proton Mail keys distributed? . 19 October 2015 . . November 15, 2018 . https://web.archive.org/web/20181115235022/https://security.stackexchange.com/questions/58541/how-are-protonmail-keys-distributed/58552#58552 . live .
  48. Web site: Khandelwal . Swati . 26 May 2014 . Proton Mail: 'NSA-Proof' End-to-End Encrypted Email Service . 19 October 2015 . The Hacker News . November 7, 2018 . https://web.archive.org/web/20181107110740/https://thehackernews.com/2014/05/protonmail-nsa-proof-end-to-end.html . live .
  49. Web site: Yen . Andy . 22 September 2015 . Proton Mail adds Facebook PGP integration . 19 October 2015 . Proton Mail Blog . May 28, 2022 . https://web.archive.org/web/20220528174453/https://proton.me/news/protonmail-facebook-pgp . live .
  50. Web site: 31 January 2016 . Proton Mail Security Details . 31 January 2016 . Proton Mail Security . October 11, 2023 . https://web.archive.org/web/20231011033516/https://proton.me/mail/security . live .
  51. News: SimpleLogin joins the Proton family . SimpleLogin . 8 April 2022 . December 14, 2023 . December 5, 2023 . https://web.archive.org/web/20231205023003/https://simplelogin.io/blog/simplelogin-join-proton/ . live .
  52. News: Yen . Andy . Proton and SimpleLogin are joining forces . Proton . 7 November 2022 . We have been following SimpleLogin closely for a long time as many Proton Mail users utilize it to prevent their Proton Mail addresses from being leaked to spammers . December 14, 2023 . June 17, 2023 . https://web.archive.org/web/20230617104320/https://proton.me/blog/proton-and-simplelogin-join-forces . live .
  53. Web site: 19 May 2014 . Why Proton Mail is in Switzerland . 2022-05-28 . Proton . en . July 6, 2022 . https://web.archive.org/web/20220706063449/https://proton.me/news/switzerland . live .
  54. Web site: Two Factor Authentication (2FA) . Proton Mail Support . May 28, 2022 . December 3, 2016 . https://web.archive.org/web/20161203061636/https://protonmail.com/support/knowledge-base/two-factor-authentication/ . live .
  55. Web site: October 13, 2022 . Protect your Proton Account with YubiKey and other security keys . January 19, 2023 . Proton Mail Blog . January 19, 2023 . https://web.archive.org/web/20230119051837/https://proton.me/blog/security-keys . live .
  56. Web site: Kobeissi. Nadim. September 6, 2021. An Analysis of the ProtonMail Cryptographic Architecture. 2021-11-02. The Cryptology ePrint Archive. November 17, 2022. https://web.archive.org/web/20221117204958/https://eprint.iacr.org/2018/1121.pdf. live.
  57. Web site: Securitum Security Report . dead . https://web.archive.org/web/20210705120405/https://protonmail.com/blog/wp-content/uploads/2021/07/securitum-protonmail-security-audit.pdf . 5 July 2021 . Proton mail blog.
  58. Web site: 2018-10-18 . Proton Mail’s world-class reliability is now backed by a 99.95% service level agreement (SLA) . 2024-08-19 . Proton . en.
  59. Web site: Yen . Andy . 2014-12-17 . Proton Mail RIPE announcement . 2021-07-16 . Proton Mail Blog . en . June 7, 2022 . https://web.archive.org/web/20220607174737/https://proton.me/news/protonmail-joins-reseaux-ip-europeens-ripe-ncc . live .
  60. Web site: Leyden . John . 5 November 2015 . Proton Mail still under attack by DDoS bombardment . 5 November 2015 . . November 15, 2018 . https://web.archive.org/web/20181115213536/https://www.theregister.co.uk/2015/11/05/protonmail_ddos_attack/ . live .
  61. 662212032368889856. ProtonMail. We are seeking a datacenter in Switzerland brave enough to host ProtonMail, many are afraid due to the magnitude of the attack against us.. 5 November 2015.
  62. Web site: Lynch . Justin . 2 July 2018 . Proton Mail CEO: 'The attacks are continuing' . Fifth Domain . . July 3, 2018 . May 4, 2019 . https://web.archive.org/web/20190504081457/https://www.fifthdomain.com/critical-infrastructure/2018/07/02/protonmail-ceo-the-attacks-are-continuing/ . live .
  63. News: 6 September 2018 . Apophis Squad member responsible for attacks against Proton Mail has been arrested - Proton Mail Blog . en-US . Proton Mail Blog . 28 September 2018 . May 4, 2019 . https://web.archive.org/web/20190504081457/https://protonmail.com/blog/apophis-squad-arrest/ . live .
  64. Web site: ProtonMail review. Graw. Michael. IT Pro. 5 October 2022. 12 August 2023. https://web.archive.org/web/20230812100351/https://www.itpro.com/network-internet/email-providers/367853/protonmail-review. 12 August 2023. live.
  65. Web site: ProtonMail - Review. Rubenking. Neil J.. PCMag. 12 December 2022. 12 August 2022. https://web.archive.org/web/20230812143447/https://www.pcmag.com/reviews/protonmail. August 12, 2023. bot: unknown.
  66. Web site: Proton Mail review. Athow. Desire. TechRadar. 16 June 2023. 12 August 2023. https://web.archive.org/web/20230812101201/https://www.techradar.com/reviews/protonmail-secure-email. 12 August 2023. live.
  67. The 6th Annual Lovie Award Winners Announced. The Lovie Awards. International Academy of Digital Arts and Sciences. 27 September 2016. 12 August 2023. https://archive.today/20230812085402/https://www.lovieawards.com/press/press-releases/the-6th-annual-lovie-award-winners-announced/. 12 August 2023. live.
  68. Web site: 2017 Winners Gallery. The Lovie Awards. International Academy of Digital Arts and Sciences. 2017. 12 August 2023. https://archive.today/20230812084841/https://winners.lovieawards.com/%23!y=2017&m=187. 12 August 2023. live.
  69. Web site: 15 November 2019 . Is Proton Mail blocked in Belarus? . Proton Mail Blog . September 14, 2022 . November 17, 2019 . https://web.archive.org/web/20191117112402/https://protonmail.com/blog/blocked-belarus/ . live .
  70. News: Tsydenova . Nadezhda . Ivanova . Polina . January 29, 2020 . Russia blocks encrypted email service Proton Mail . . Heinrich . Mark . January 30, 2020 . January 30, 2020 . https://web.archive.org/web/20200130180757/https://www.reuters.com/article/us-russia-protonmail/russia-blocks-encrypted-email-service-protonmail-idUSKBN1ZS1K8 . live .
  71. Web site: 2020-01-29 . Почтовый сервис Proton Mail заблокировали в России из-за сообщений о минированиях . 2020-01-29 . www.kommersant.ru . ru . January 29, 2020 . https://web.archive.org/web/20200129123625/https://www.kommersant.ru/doc/4234867 . live .
  72. Web site: Reuters . 2020-01-29 . Russia Blocks Encrypted Swiss Email Service Proton Mail . 2020-01-29 . The Moscow Times . en . January 29, 2020 . https://web.archive.org/web/20200129170137/https://www.themoscowtimes.com/2020/01/29/russia-blocks-encrypted-swiss-email-service-protonmail-a69088 . live .
  73. Web site: Proton Mail не получала просьб о помощи в поисках лжеминеров . 2020-01-29 . Interfax.ru . ru . January 29, 2020 . https://web.archive.org/web/20200129170137/https://www.interfax.ru/world/693178 . live .
  74. Web site: 2020-01-29 . Россия не обращалась за информацией о "минерах", заявили в Proton Mail . 2020-01-29 . РИА Новости . ru . January 29, 2020 . https://web.archive.org/web/20200129163940/https://ria.ru/20200129/1564015317.html . live .
  75. Web site: 2020-03-13 . We are rolling out technologies which will help us better overcome attempts to block Proton Mail. . 2020-03-14 . Reddit . en . November 14, 2020 . https://web.archive.org/web/20201114071223/https://www.reddit.com/r/ProtonMail/comments/fhig4f/we_are_rolling_out_technologies_which_will_help/ . live .
  76. Web site: 2021-09-10 . Transparency Report . 2021-09-10 . proton.me . August 25, 2022 . https://web.archive.org/web/20220825141230/https://proton.me/legal/transparency . live .
  77. Web site: 2022-05-25 . Proton Privacy Policy . 2021-09-10 . proton.me . September 5, 2021 . https://web.archive.org/web/20210905222006/https://protonmail.com/privacy-policy . live .
  78. Web site: 2022-04-21 . Proton VPN Passes Its Latest No-Logs Audit . 2022-05-28 . cnet.com . May 14, 2022 . https://web.archive.org/web/20220514084551/https://www.cnet.com/news/privacy/protonvpn-clears-its-latest-no-logs-audit/ . live .
  79. News: Silva . Gioia da . 3 August 2021 . «Wenn du noch einmal das Wort Impfpflicht in den Mund nimmst, schlage ich dir und deiner Frau die Zähne aus»: Der Schweizer Service ProtonMail wird immer wieder für Drohungen missbraucht . "If you say the word compulsory vaccination again, I'll knock your and your wife's teeth out": The Swiss service Proton Mail is repeatedly misused for threats . 2021-09-10 . Neue Zürcher Zeitung . de-CH . May 13, 2024 . https://web.archive.org/web/20240513052917/https://www.nzz.ch/technologie/wie-weit-geht-die-privatsphaere-beim-schweizer-service-protonmail-ld.1638648 . live .
  80. Web site: 2021-09-06 . Important clarifications regarding arrest of climate activist . 2021-09-10 . proton.me . May 28, 2022 . https://web.archive.org/web/20220528174445/https://proton.me/news/climate-activist-arrest . live .
  81. News: Shields . Michael . 2021-10-22 . Secure email group Proton wins Swiss appeal over surveillance rules . en . Reuters . 2022-05-26 . October 17, 2023 . https://web.archive.org/web/20231017135323/https://www.reuters.com/technology/proton-wins-swiss-court-appeal-over-surveillance-rules-2021-10-22/ . live .
  82. Web site: May 14, 2024 . Proton Mail provided user data that led to an arrest in Spain . live . TechSpot . May 14, 2024 . May 14, 2024 . https://web.archive.org/web/20240514125832/https://www.techspot.com/news/102981-proton-mail-provided-user-data-led-arrest-spain.html .
  83. Web site: Proton Mail - Pricing . 21 December 2023 . Proton . June 9, 2019 . https://web.archive.org/web/20190609151127/https://protonmail.com/pricing . live .
  84. Web site: Proton Family plan . 2023-12-21 . Proton . en . December 21, 2023 . https://web.archive.org/web/20231221174009/https://proton.me/family . live .
  85. Web site: Proton for Business plans and pricing. 20 February 2023. Proton. February 20, 2023. https://web.archive.org/web/20230220210101/https://proton.me/business/plans. live.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Proton Mail".

Except where otherwise indicated, Everything.Explained.Today is © Copyright 2009-2024, A B Cryer, All Rights Reserved. Cookie policy.