all-in-one privacy solution":["Proton Unlimited is een all-in-one privacy-oplossing"],"Black Friday":["Black Friday"],"No ads. Privacy by default.":["Geen advertenties. Standaard privacy."],"People before profits":["Mensen vóór winst"],"Security through transparency":["Veiligheid door openheid"],"The best Proton Mail ${ BLACK_FRIDAY } deals":["De beste ${ BLACK_FRIDAY }-deals voor Proton Mail"],"The world’s only community- supported email service":["'s Werelds enige door de community ondersteunde e-mailservice"]},"specialoffer:limited":{"${ hours } hour":["${ hours } uur","${ hours } uur"],"${ hoursLeft }, ${ minutesLeft } and ${ secondsLeft } left":["Nog ${ hoursLeft }, ${ minutesLeft } en ${ secondsLeft } resterend"],"${ minutes } minute":["${ minutes } minuut","${ minutes } minuten"],"${ seconds } second":["${ seconds } seconde","${ seconds } seconden"],"Limited time offer":["Aanbieding beperkt geldig"]},"specialoffer:listitem":{"Create multiple addresses":["Maak meerdere e-mailadressen aan"],"Hide-my-email aliases":["Hide-my-email-aliassen"],"Quickly unsubscribe from newsletters":["Meld u eenvoudig af voor nieuwsbrieven"],"Use your own domain name":["Gebruik uw eigen domeinnaam"]},"specialoffer:logos":{"As featured in":["Zoals te lezen in"]},"specialoffer:metadescription":{"Get an encrypted email that protects your privacy":["Kies voor beveiligde e-mail die uw privacy beschermt"]},"specialoffer:metatitle":{"Proton Mail Black Friday Sale - Up to 40% off":["Proton Mail Black Friday Sale - Tot 40% korting"]},"specialoffer:newmetadescription":{"Get up to 40% off Proton Mail subscriptions this Black Friday. Find great deals on our secure end-to-end encrypted email plans.":["Profiteer tijdens Black Friday van wel 40% korting op Proton Mail-abonnementen. Bekijk geweldige aanbiedingen voor onze veilige, end-to-end versleutelde e-mailabonnementen."]},"specialoffer:newmetatitle":{"Proton Mail Black Friday sale | Up to 40% off secure email":["Proton Mail Black Friday Sale | Tot 40% korting op veilige e-mail"]},"specialoffer:note":{"* Billed at ${ TOTAL_SUM } for the first year":["*U betaalt ${ TOTAL_SUM } voor het eerste jaar"],"*Billed at ${ TOTAL_SUM } for the first 2 years":["*U betaalt ${ TOTAL_SUM } voor de eerste 2 jaar"],"30-day money-back guarantee":["30 dagen niet-goed-geld-terug-garantie"],"Billed at ${ TOTAL_SUM } for the first 2 years":["U betaalt ${ TOTAL_SUM } voor de eerste 2 jaar"],"Billed at ${ TOTAL_SUM } for the first year":["U betaalt ${ TOTAL_SUM } voor het eerste jaar"],"You save ${ SAVE_SUM }":["U bespaart ${ SAVE_SUM }"]},"specialoffer:off":{"${ PERCENT_OFF } off":["−${ PERCENT_OFF }"]},"specialoffer:testimonial":{"I love my ProtonMail":["Ik ben fan van ProtonMail"],"My favorite email service":["Mijn favoriete e-mailservice"],"Thanks Proton for keeping us all safe in the complicated internet universe.":["Proton houdt ons allemaal veilig in het complexe internetuniversum."],"You get what you pay for. In the case of big tech, if you pay nothing, you get used. I quit using Gmail and switched to @ProtonMail":["Je krijgt waarvoor je betaalt. In het geval van Big Tech betekent 'gratis' dat je wordt gebruikt. Ik ben gestopt met Gmail en overgestapt op @ProtonMail"]},"specialoffer:time":{"Days":["Dagen"],"Hours":["Uur"],"Min":["Min"]},"specialoffer:title":{"And much more":["En nog veel meer"],"Safe from trackers":["Beschermd tegen trackers"],"Stay organized":["Blijf georganiseerd"],"Black Friday email deals":["Black Friday-deals voor e-mail"],"Don’t just take our word for it":["U hoeft ons niet te geloven"],"Make your inbox yours":["Maak uw inbox van u"],"Our story":["Ons verhaal"],"Transfer your data from Google in one click":["Zet uw gegevens van Google over met één klik"]},"specialoffer:tooltip":{"Access blocked content and browse privately. Includes ${ TOTAL_VPN_SERVERS }+ servers in ${ TOTAL_VPN_COUNTRIES }+ countries, connect up to 10 devices, access worldwide streaming services, malware and ad-blocker, and more.":["Bekijk geblokkeerde inhoud en surf privé. Met ${ TOTAL_VPN_SERVERS }+ servers in meer dan ${ TOTAL_VPN_COUNTRIES } landen, verbinding met maximaal 10 apparaten, wereldwijd toegang tot streamingdiensten, malware- en advertentieblokkering, en meer."],"Easily share your calendar with your family, friends or colleagues, and view external calendars.":["Deel uw agenda eenvoudig met uw familie, vrienden of collega's, en bekijk externe agenda's."],"Includes support for 1 custom email domain, 10 email addresses, 10 hide-my-email aliases, calendar sharing, and more.":["Ondersteuning voor 1 aangepast e-maildomein, 10 e-mailadressen, 10 hide-my-email-aliassen, gedeelde agenda's en meer."],"Includes support for 3 custom email domains, 15 email addresses, unlimited hide-my-email aliases, calendar sharing, and more.":["Ondersteuning voor 3 aangepaste e-maildomeinen, 15 e-mailadressen, onbeperkt hide-my-email-aliassen, gedeelde agenda's en meer."],"Manage up to 25 calendars, mobile apps, secured with end-to-end encryption, 1-click calendar import from Google, and more.":["Beheer tot 25 agenda's, mobiele apps, beveiligd met end-to-end versleuteling, agenda's van Google importeren met 1 klik, en meer."]},"Status banner":{"Learn more":["Meer informatie"],"Please note that at the moment we are experiencing issues with the ${ issues[0] } service.":["We ondervinden op dit moment problemen met de ${ issues[0] }service."],"We are experiencing issues with one or more services at the moment.":["We ondervinden momenteel problemen met een of meer services."]},"Status Banner":{"At the moment we are experiencing issues with the Proton VPN service":["Momenteel werkt de dienst van Proton VPN niet naar behoren"],"Learn more":["Meer informatie"]},"steps":{"Step":["Stap"]},"suggestions":{"Suggestions":["Suggesties"]},"Support":{"Sub category":["Subcategorie","Subcategorieën"]},"Support article":{"${ readingTime } min":["${ readingTime } min","${ readingTime } min"],"Category":["Categorie","Categorieën"],"Didn’t find what you were looking for?":["Niet gevonden wat u zocht?"],"General contact":["Algemene contactgegevens"],"Get help":["Krijg hulp"],"Legal contact":["Contactgegevens voor juridische zaken"],"Media contact":["Contactgegevens voor media"],"Partnerships contact":["Contactgegevens voor partnerschappen"],"Reading":["Lezen"]},"Support Form Platform option":{"VPN for Android TV":["VPN voor Android TV"],"VPN for Chromebook":["VPN voor Chromebook"]},"Support troubleshooting":{"App version":["App-versie"],"Browser":["Browser"],"Check if this helps":["Kijk of dit helpt"],"Choose a product":["Kies een product"],"Did this solve your issue?":["Heeft dit uw probleem opgelost?"],"Faster assistance is just a few clicks away":["Snellere hulp is met een paar klikken geregeld"],"How can we help?":["Hoe kunnen we helpen?"],"No, contact support":["Nee, contact opnemen met ondersteuning"],"Please fill out one field after another":["Vul de velden achter elkaar in"],"Please make your selections":["Maak een keuze"],"Proton account":["Proton-account"],"Proton for Business":["Proton for Business"],"Thank you for your feedback":["Bedankt voor uw feedback"],"What can we help with?":["Waar kunnen we mee helpen?"],"Yes":["Ja"]},"support_modal_search_query":{"Search query":["Zoekopdracht"]},"support_search_button":{"Search":["Zoeken"]},"support_search_i_am_looking_for":{"I'm looking for":["Ik ben op zoek naar"]},"SupportForm":{"For a faster resolution, please report the issue from the Bridge app: Help > Report a problem.":["Om problemen sneller op te lossen, meldt u het via de Bridge-app: Help > Een probleem melden."],"Information":["Informatie"]},"SupportForm:option":{"Account Security":["Accountbeveiliging"],"Contacts":["Contactpersonen"],"Custom email domain":["Aangepast e-maildomein"],"Email delivery and Spam":["E-maillevering en spam"],"Encryption":["Versleuteling"],"Login and password":["Inlognaam en wachtwoord"],"Merge aliases and accounts":["Aliassen en accounts samenvoegen"],"Migrate to Proton":["Migreren naar Proton"],"Notifications":["Meldingen"],"Other":["Overig"],"Plans and billing":["Abonnementen en facturering"],"Proton for Business":["Proton for Business"],"Sign up":["Inschrijven"],"Storage":["Opslag"],"Users, addresses, and identities":["Gebruikers, adressen en identiteiten"]},"SupportForm:optionIntro":{"Select a topic":["Kies een onderwerp"]},"swiss_baseed_feature":{"Swiss based":["Gevestigd in Zwitserland"]},"Testimonial":{"Awards":["Awards"],"Customers":["Klanten"],"Featured":["Featured"],"Go to testimonial source":["Naar bron van testimonial"],"Open source of award":["Bron van award openen"],"Open source of quote":["Bron van citaat openen"],"Reviews":["Reviews"],"Videos":["Video's"],"Watch on TikTok":["Bekijken op TikTok"],"Watch on YouTube":["Bekijken op YouTube"]},"TestimonialCategory":{"Awards":["Awards"],"Customers":["Klanten"],"Featured":["Featured"],"Media":["Media"],"Reviews":["Reviews"],"Videos":["Video's"]},"Text":{"If you need help, check out our ${ supportLink }.":["Bekijk onze ${ supportLink } als u hulp nodig hebt."],"The page you’re looking for might have been removed, or it could be an\nold link.":["De pagina waarnaar u op zoek bent, is mogelijk verwijderd, of u gebruikt een oude koppeling."],"Your question may already have an answer in our knowledge base:":["Uw vraag is mogelijk al beantwoord in onze kennisbank:"]},"Title":{"On this page":["Op deze pagina"],"Related articles":["Gerelateerde artikelen"],"Share ${ thisPage }":["${ thisPage } delen"],"Switch to Proton Pass - Contact us":["Stap over op Proton Pass - Neem contact met ons op"],"Thank you!":["Bedankt!"],"this page":["deze pagina"]},"Tooltip":{"More information":["Meer informatie"]},"tooltip_vpn":{"Access blocked content and browse privately. Includes ${ TOTAL_VPN_SERVERS }+ servers in ${ TOTAL_VPN_COUNTRIES }+ countries, highest VPN speed, ${ TOTAL_VPN_CONNECTIONS } VPN connections, worldwide streaming services, malware and ad-blocker, and more.":["Bekijk geblokkeerde inhoud en surf privé. Met meer dan ${ TOTAL_VPN_SERVERS } servers in meer dan ${ TOTAL_VPN_COUNTRIES } landen, de hoogste VPN-snelheid, ${ TOTAL_VPN_CONNECTIONS } VPN-verbindingen, wereldwijde streamingdiensten, malware- en advertentieblokkering, en meer."]},"vpn_servers":{"Get Proton VPN Plus":["Neem Proton VPN Plus"]},"wallet_signup_2024:Action":{"Get Proton Wallet":["Kies Proton Wallet"]},"wallet_signup_2024:Homepage hero product link title":{"Wallet":["Wallet"]},"wallet_signup_2024:Homepage product navigation bar":{"Wallet":["Wallet"]},"wallet_signup_2024:menu item":{"Bitcoin guide":["Bitcoin-gids"],"Proton Wallet news":["Proton Wallet-nieuws"],"Proton Wallet support":["Ondersteuning voor Proton Wallet"]},"wallet_signup_2024:Pricing":{"Includes everything in Proton Unlimited and":["Omvat alles van Proton Unlimited en"],"Limited availability":["Beperkte beschikbaarheid"],"The easiest way to securely own, send, and receive Bitcoin":["De eenvoudigste manier om Bitcoin veilig te bewaren, versturen en ontvangen"]},"wallet_signup_2024:ProductRange":{"Discover Proton Wallet":["Ontdek Proton Wallet"],"Store and transact Bitcoin privately with an encrypted self-custody wallet.":["Bewaar en verhandel Bitcoin privé met een versleutelde zelfbeheerde portemonnee."]},"wallet_signup_2024:wallet bitcoin":{"Learn about Bitcoin, the Internet's value network.":["Meer informatie over Bitcoin, het valutanetwerk van het internet."]},"wallet_signup_2024:wallet overview":{"Ensure you're always in control of your Bitcoin.":["Zorg dat u altijd de controle heeft over uw Bitcoins."]},"wallet_signup_2024:wallet security":{"The encrypted, open-source wallet that puts you in control.":["De versleutelde, open-source portemonnee waarvan u de baas bent."]}}},"base":"blog","cdn":{"enabledForAssets":true,"enabledForImages":true,"url":"https://pmecdn.protonweb.com/"},"unleashApi":"https://account.proton.me/api"};
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Fighting Censorship with Proton Mail Encrypted Email Over Tor | Proton
As part of our efforts to continue protecting user privacy, we are launching a Tor hidden service to combat censorship and surveillance of Proton Mail users.
UPDATE October 2021: New TLS certificate. See below.
At the same time, the stakes are also higher than ever before. As Proton Mail has grown, we have become increasingly aware of our role as a tool for freedom of speech, and in particular for investigative journalism. Last fall, we were invited to the 2nd Asian Investigative Journalism Conference(nieuw venster) and were able to get a firsthand look at the importance of tools like Proton Mail in the field.
Recently, more and more countries have begun to take active measures to surveil or restrict access to privacy services(nieuw venster), cutting off access to these vital tools. We realize that censorship of Proton Mail in certain countries is not a matter of if, but a matter of when. That’s why we have created a Tor hidden service (also known as an onion site) for Proton Mail to provide an alternative access to Proton Mail that is more secure, private, and resistant to censorship.
Tor Hidden Service for Encrypted Email
Starting today, it is also possible to connect to Proton Mail directly through the Tor network using our new onion site. In order to use our onion site, you need to first set up Tor on your computer. Instructions for using Proton Mail encrypted email with Tor can be found here(nieuw venster). After Tor is properly set up, Proton Mail’s onion site can be visited at the following URL:
We would like to give a special thanks to Roger Dingledine and the Tor Project(nieuw venster) for creating the Tor software and also providing insightful comments and suggestions regarding Proton Mail’s onion site implementation.
Tor Email Privacy
There are several reasons why you might want to use Proton Mail over Tor. First, routing your traffic to Proton Mail through the Tor network makes it difficult for an adversary wiretapping your internet connection to know that you are using Proton Mail. Tor applies extra encryption layers on top of your connection, making it more difficult for an advanced attacker to perform a man-in-the-middle attack on your connection to us. Tor also makes your connections to Proton Mail anonymous as we will not be able to see the true IP address of your connection to Proton Mail.
Tor can also help with Proton Mail accessibility. If Proton Mail becomes blocked in your country, it may be possible to reach Proton Mail by going to our onion site. Furthermore, onion sites are “hidden” services in the sense that an adversary cannot easily determine their physical location(nieuw venster). Thus, while proton.me could be attacked by DDoS attacks, protonirockerxow.onion cannot be attacked in the same way because an attacker will not be able to find a public IP address(nieuw venster).
Note, it is also possible to visit Proton Mail via Tor at our regular site, https://proton.me(nieuw venster), but there are several advantages to using the onion site. First, onion site connections provide true end-to-end encryption on the Tor level, meaning that the extra encryption that Tor applies is present until your connection reaches our infrastructure, whereas a non-onion Tor connection does not have Tor encryption beyond the last node. Secondly, Tor also provides end-to-end authentication, with helps to mitigate some of the weaknesses with the existing Certificate Authority system(nieuw venster) that is used to secure most of the Internet (more about this later).
Using Tor does come with some downsides however. Tor connections typically are much slower than a standard internet connection, so performance will suffer as a result. Proton Mail’s onion site is still considered to be experimental, so its reliability may not be as high as our standard site.
Since our onion site is still experimental, we are not making any recommendations yet regarding the use of Proton Mail’s onion site. Even without using Tor, your Proton Mail inbox is still strongly protected with PGP end-to-end encryption(nieuw venster), secure authentication(nieuw venster) (SRP), and optional two-factor authentication(nieuw venster). However, Proton Mail definitely has users in sensitive situations where the extra security and anonymity provided by Tor could literally save lives.
Proton Mail’s Onion Site – Technical Details
In implementing Proton Mail’s onion site, we took a few additional precautions to ensure the highest level of security to protect against advanced threats.
HTTPS with Tor
As an added security feature, we have decided to offer our onion site with HTTPS only. To accomplish this, we partnered with SSL Certificate provider Digicert(nieuw venster) to provide a valid certificate for our .onion website. Previously, Digicert issued the first-ever onion SSL certificate to Facebook(nieuw venster) and we’re glad that Digicert was able to do the same for Proton Mail.
Proton Mail’s .onion SSL certificate has Extended Validation, which provides an additional layer of protection against phishing because you can be certain that the onion site you are connecting to belongs to us. For extra security, you can also manually verify the SSL certificate for https://protonmailrmez3lotccipshtkleegetolb73fuirgj7r4o4vfu7ozyd.onion/ with the following SHA hashes.
While HTTPS is not strictly necessary for onion sites, we decided to make it mandatory for Proton Mail for several reasons:
First, we will likely take advantage of the ability to keep the location of onion sites secret by hosting our .onion website far away from our current infrastructure in an undisclosed location and country. In this situation, HTTPS adds an additional encryption layer to protect the traffic between the onion front end and our core infrastucture. HTTPS also allows us to continue enforcing the usage of secure cookies, which improves user security.
Secondly, we believe in security in depth. For this reason, we don’t believe HTTPS is entirely redundant for onion sites. If someday Tor were to be compromised, enforcing HTTPS adds another layer of security for the end user. Similarly, Tor also provides security in case HTTPS is compromised. The notion of HTTPS being compromised(nieuw venster) is one that we take seriously, considering that there are hundreds of CAs (Certificate Authorities) that are trusted by default, with many of them under direct government control in high risk countries.
Thus, by using our onion site, your emails are protected by three layers of end-to-end encryption, there’s Tor’s encryption on the outer layer, HTTPS in the middle layer, and PGP as the final layer of defense for the emails themselves.
What’s Next?
You can find a more simplified and condensed version of all of this on the following webpage we have created to give the 30-second summary of Proton Mail’s Tor support:
In the coming months, we will be hard at work making additional security and privacy enhancements to Proton Mail, including finishing some of the leftover items from our 2016 Security Roadmap(nieuw venster). Moving forward in 2017, we will be putting added focus on making Proton Mail more censorship resistant, and providing our user community with the tools required to connect securely to Proton Mail, even from compromised locations.
For questions and comment, you can reach us at media@proton.me.
Proton Mail is funded by community contributions. If you would like to support our development efforts, you can upgrade to a paid plan(nieuw venster). Thank you for your support!
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