all-in-one privacy solution":["Proton Unlimited ist eine All-in-One-Datenschutzlösung"],"Black Friday":["Black Friday"],"No ads. Privacy by default.":["Keine Werbung. Privatsphäre als Standard."],"People before profits":["Menschen sind uns wichtiger als Gewinne"],"Security through transparency":["Sicherheit durch Transparenz"],"The best Proton Mail ${ BLACK_FRIDAY } deals":["Die besten Proton Mail-Angebote zum ${ BLACK_FRIDAY }"],"The world’s only community- supported email service":["Der weltweit einzige von der Community unterstützte E-Mail-Dienst"]},"specialoffer:limited":{"${ hours } hour":["${ hours } Stunde","${ hours } Stunden"],"${ hoursLeft }, ${ minutesLeft } and ${ secondsLeft } left":["Nur noch ${ hoursLeft }, ${ minutesLeft } und ${ secondsLeft }"],"${ minutes } minute":["${ minutes } Minute","${ minutes } Minuten"],"${ seconds } second":["${ seconds } Sekunde","${ seconds } Sekunden"],"Limited time offer":["Zeitlich befristetes Angebot"]},"specialoffer:listitem":{"Create multiple addresses":["Erstelle mehrere Adressen"],"Hide-my-email aliases":["Hide-my-email-Aliase"],"Quickly unsubscribe from newsletters":["Newsletter schnell abbestellen"],"Use your own domain name":["Verwende deine eigene Domain"]},"specialoffer:logos":{"As featured in":["Vorgestellt in"]},"specialoffer:metadescription":{"Get an encrypted email that protects your privacy":["Nutze einen verschlüsselte E-Mail-Dienst, der deine Privatsphäre schützt"]},"specialoffer:metatitle":{"Proton Mail Black Friday Sale - Up to 40% off":["Proton Mail Black Friday-Angebot – Bis zu 40 % Rabatt"]},"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.":["Erhalte an diesem Black Friday bis zu 40 % Rabatt auf Proton Mail-Abonnements. Mache tolle Schnäppchen bei unseren sicheren, Ende-zu-Ende-verschlüsselten E-Mail-Abonnements."]},"specialoffer:newmetatitle":{"Proton Mail Black Friday sale | Up to 40% off secure email":["Proton Mail-Black-Friday-Angebot | Bis zu 40 % Rabatt auf sichere E-Mails"]},"specialoffer:note":{"* Billed at ${ TOTAL_SUM } for the first year":["* Zum Preis von ${ TOTAL_SUM } im ersten Jahr"],"*Billed at ${ TOTAL_SUM } for the first 2 years":["*Zum Preis von ${ TOTAL_SUM } in den ersten zwei Jahren"],"30-day money-back guarantee":["30-tägige Geld-zurück-Garantie"],"Billed at ${ TOTAL_SUM } for the first 2 years":["Zum Preis von ${ TOTAL_SUM } in den ersten zwei Jahren"],"Billed at ${ TOTAL_SUM } for the first year":["Zum Preis von ${ TOTAL_SUM } im ersten Jahr"],"You save ${ SAVE_SUM }":["Du sparst ${ SAVE_SUM }"]},"specialoffer:off":{"${ PERCENT_OFF } off":["− ${ PERCENT_OFF }"]},"specialoffer:testimonial":{"I love my ProtonMail":["Ich liebe mein ProtonMail"],"My favorite email service":["Mein Lieblings-E-Mail-Dienst"],"Thanks Proton for keeping us all safe in the complicated internet universe.":["Danke Proton, dass du uns alle im komplizierten Internet-Universum beschützt."],"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":["Du bekommst, wofür du bezahlst. Wenn du nichts bezahlst, wirst du bei der Nutzung von Big Tech ausgenutzt. Ich habe Gmail aufgegeben und bin zu @ProtonMail gewechselt"]},"specialoffer:time":{"Days":["Tage"],"Hours":["Stunden"],"Min":["Min."]},"specialoffer:title":{"And much more":["Und vieles mehr"],"Safe from trackers":["Sicher vor Trackern"],"Stay organized":["Ordnung halten"],"Black Friday email deals":["E-Mail-Angebote zum Black Friday"],"Don’t just take our word for it":["Verlasse dich nicht nur auf unser Wort"],"Make your inbox yours":["Passe deinen Posteingang an"],"Our story":["Unsere Geschichte"],"Transfer your data from Google in one click":["Übertrage deine Daten von Google mit einem Klick"]},"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.":["Greife auf blockierte Inhalte zu und surfe privat. Umfasst ${ TOTAL_VPN_SERVERS } Server in über ${ TOTAL_VPN_COUNTRIES } Ländern, die Verbindung \nvon bis zu 10 Geräten, weltweite Streaming-Dienste, Malware- und Werbeblocker und mehr."],"Easily share your calendar with your family, friends or colleagues, and view external calendars.":["Teile deinen Kalender ganz einfach mit Verwandten, Freunden oder Kollegen und rufe externe Kalender auf."],"Includes support for 1 custom email domain, 10 email addresses, 10 hide-my-email aliases, calendar sharing, and more.":["Beinhaltet Unterstützung für eine eigene E-Mail-Domain, 10 E-Mail-Adressen, 10 „hide-my-email“-Aliasse, Kalenderfreigabe und mehr."],"Includes support for 3 custom email domains, 15 email addresses, unlimited hide-my-email aliases, calendar sharing, and more.":["Beinhaltet Unterstützung für 3 benutzerdefinierte E-Mail-Domänen, 15 E-Mail-Adressen, unbegrenzte „hide-my-email“-Aliase, Kalenderfreigabe und mehr."],"Manage up to 25 calendars, mobile apps, secured with end-to-end encryption, 1-click calendar import from Google, and more.":["Verwalte bis zu 25 Kalender, Ende zu Ende verschlüsselte mobile Apps, 1-Klick-Kalenderimporte von Google und vieles mehr."]},"Status Banner":{"At the moment we are experiencing issues with the Proton VPN service":["Im Moment gibt es Probleme mit dem Proton VPN-Dienst"]},"Status banner":{"Learn more":["Mehr erfahren"],"Please note that at the moment we are experiencing issues with the ${ issues[0] } service.":["Bitte beachte, dass wir im Moment Probleme mit dem Dienst ${ issues[0] } haben."],"We are experiencing issues with one or more services at the moment.":["Im Moment gibt es Probleme mit einem oder mehreren Diensten."]},"steps":{"Step":["Schritt"]},"suggestions":{"Suggestions":["Vorschläge"]},"Support":{"Sub category":["Unterkategorie","Unterkategorien"]},"Support article":{"${ readingTime } min":["${ readingTime } Min.","${ readingTime } Min."],"Category":["Kategorie","Kategorien"],"Didn’t find what you were looking for?":["Hast du nicht gefunden, wonach du gesucht hast?"],"General contact":["Allgemeiner Kontakt"],"Get help":["Hilfe erhalten"],"Legal contact":["Kontakt für Rechtliches"],"Media contact":["Kontakt für Medien"],"Partnerships contact":["Kontakt für Partnerschaften"],"Reading":["Lesen"]},"Support Form Platform option":{"VPN for Android TV":["VPN für Android TV"],"VPN for Apple TV":["VPN für Apple TV"],"VPN for Chromebook":["VPN für Chromebook"]},"Support troubleshooting":{"App version":["App-Version"],"Browser":["Browser"],"Check if this helps":["Schau, ob das hilft."],"Choose a product":["Produkt auswählen"],"Did this solve your issue?":["Hat dies dein Problem gelöst?"],"Faster assistance is just a few clicks away":["Schnellere Hilfe ist nur ein paar Klicks entfernt"],"How can we help?":["Wie können wir dir helfen?"],"No, contact support":["Nein, Support kontaktieren"],"Please fill out one field after another":["Bitte fülle ein Feld nach dem anderen aus"],"Please make your selections":["Bitte triff deine Auswahl"],"Proton account":["Proton-Konto"],"Proton for Business":["Proton for Business"],"Thank you for your feedback":["Danke für dein Feedback"],"What can we help with?":["Wobei können wir dir helfen?"],"Yes":["Ja"]},"support_modal_search_query":{"Search query":["Anfrage suchen"]},"support_search_button":{"Search":["Suchen"]},"support_search_i_am_looking_for":{"I'm looking for":["Ich suche"]},"SupportForm":{"For a faster resolution, please report the issue from the Bridge app: Help > Report a problem.":["Damit das Problem schneller gelöst werden kann, melde es bitte über die Bridge-App: Help > Report a problem (Hilfe > Problem melden)."],"Information":["Informationen"]},"SupportForm:option":{"Account Security":["Kontosicherheit"],"Contacts":["Kontakte"],"Custom email domain":["Benutzerdefinierte E-Mail-Domain"],"Email delivery and Spam":["E-Mail-Zustellung und Spam"],"Encryption":["Verschlüsselung"],"Login and password":["Anmeldung und Passwort"],"Merge aliases and accounts":["Zusammenführung von Aliassen und Konten"],"Migrate to Proton":["Migration zu Proton"],"Notifications":["Benachrichtigungen"],"Other":["Sonstiges"],"Plans and billing":["Abonnements und Abrechnung"],"Proton for Business":["Proton for Business"],"Sign up":["Registrierung"],"Storage":["Speicher"],"Users, addresses, and identities":["Benutzer, Adressen und Identitäten"]},"SupportForm:optionIntro":{"Select a topic":["Thema auswählen"]},"Testimonial":{"Awards":["Auszeichnungen"],"Customers":["Kunden"],"Featured":["Empfohlen"],"Go to testimonial source":["Zur Referenzquelle wechseln"],"Open source of award":["Quelle der Auszeichnung öffnen"],"Open source of quote":["Quelle des Zitats öffnen"],"Reviews":["Bewertungen"],"Videos":["Videos"],"Watch on TikTok":["Auf TikTok ansehen"],"Watch on YouTube":["Auf YouTube ansehen"]},"TestimonialCategory":{"Awards":["Auszeichnungen"],"Customers":["Kunden"],"Featured":["Empfohlen"],"Media":["Medien"],"Reviews":["Bewertungen"],"Videos":["Videos"]},"Text":{"If you need help, check out our ${ supportLink }.":["Hilfe erhältst du in unserem ${ supportLink }."],"The page you’re looking for might have been removed, or it could be an\nold link.":["Die von dir gesuchte Seite wurde möglicherweise entfernt, oder es könnte sich um einen alten Link handeln."],"Your question may already have an answer in our knowledge base:":["Vielleicht gibt es bereits eine Antwort auf deine Frage in unserer Wissensdatenbank:"]},"Title":{"On this page":["Auf dieser Seite"],"Page not found":["Seite nicht gefunden"],"Related articles":["Verwandte Artikel"],"Share ${ thisPage }":["${ thisPage } teilen"],"Switch to Proton Pass - Contact us":["Zu Proton Pass wechseln – Kontaktiere uns"],"Thank you!":["Vielen Dank!"],"this page":["diese Seite"]},"tooltip_vpn":{"Access blocked content and 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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.":["Greife auf blockierte Inhalte zu und surfe privat. 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Proton Mail now offers elliptic curve cryptography for advanced security and faster speeds | Proton
For several months, we have been working to implement support for new cryptographic methods in Proton Mail that give users a faster experience with equal or better security. Today, we’re excited to announce that elliptic curve cryptography is now available in all our applications for web, mobile, and desktop(neues Fenster) (Bridge).
For reasons we explain below, elliptic curves are rapidly replacing RSA as the gold standard for public-key cryptography. You may already be using it in other services, such as WhatsApp; Chrome, Firefox, and Opera browsers; and Tor. In March 2018, we released(neues Fenster) elliptic curve cryptography in OpenPGPjs(neues Fenster), the open-source encryption library we maintain, allowing hundreds of apps to take advantage of next-generation cryptography. In August, OpenPGPjs passed an independent security audit(neues Fenster), paving the way for implementation in Proton Mail.
Why switch to elliptic curve cryptography?
For decades, RSA was the only game in town, rooted in a powerful mathematical concept: multiplying large prime numbers is easy, but factoring the product is hard. But as computers get faster, RSA encryption requires bigger and bigger numbers to stay secure. Large numbers slow things down, especially on mobile devices with less computing power.
So, over the last few years, more products and protocols(neues Fenster) have been implementing a more efficient cryptographic system called elliptic curve cryptography. ECC also relies on a mathematical equation, but it requires much smaller numbers to accomplish the same level of security. For a more detailed explanation of how this kind of cryptography works, Ars Technica has published a useful summary(neues Fenster).
Using elliptic curve cryptography, the processes of key generation, encryption, and decryption become dramatically faster. That saves processing power (allowing you to log in and load emails faster), memory (freeing up space for other apps to work), and energy (giving you longer battery life).
Elliptic curve cryptography is very secure
Public key cryptography — both high-bit RSA and elliptic curves — is extremely safe. As with any encrypted system, the only practical way to backdoor it is to exploit weaknesses in its implementation, not the math itself. With ECC, there are only two known attacks, one(neues Fenster) that takes advantage of random number generators and another(neues Fenster) that exploits things like device power consumption to glean clues about the keys. Both of these are well understood and were mitigated years ago.
We have chosen a particular elliptic curve system known as X25519, which is fast, secure, and particularly resistant to timing attacks(neues Fenster). It’s simple to implement and, for what it’s worth, isn’t the subject of any patent claims. (For advanced users, you can find a technical explanation of this decision at the bottom of this article.)
Some users may also be curious about quantum computers, which will be insanely fast and promise to upend existing encryption systems. Elliptic curve cryptography in its current form would not stand a chance against a quantum computer. But such technology is still at least several years away, and just as Proton Mail has adapted to the new ECC standard, we will continue to evolve alongside new challenges. There is active research today into quantum-resistant encryption algorithms which we are following closely.
How to use the new keys in Proton Mail
Over time, ECC keys will become the default for all new addresses in Proton Mail. If you already have a Proton Mail account, you can upgrade your RSA keys for each email address now. (You will still be able read emails encrypted with the old keys, provided you do not delete them.)
Log in to your account at mail.proton.me, click on Settings, and open the Keys page. Click on the “Add New Key” button and select the address for which you want to add ECC keys.
Then select:
State-of-the-art X25519 (Modern, fastest, secure)
And click on “Generate Keys”. You will be asked to enter your account password.
Next, click on the arrow next to your email address to reveal the key details. In the ECC key row, click on the dropdown menu and select “Make Primary.” This will make your new ECC the default key for this email address.
It is extremely important that you DO NOT DELETE YOUR OLD RSA KEYS. If you do, you will lose the ability to decrypt all your existing emails. Simply leave your old keys active; they will be used to decrypt old messages.
If you wish to continue using RSA encryption, your emails will still be safe, but your mailbox might move slower, especially on mobile devices. For the vast majority of users, ECC is the better method. (Some advanced users who receive PGP emails from non-Proton Mail users may decide to stay with RSA keys for a particular email address.)
We are excited to give you access to the latest advances in cryptography, and we look forward to hearing your feedback. You can find us on Twitter(neues Fenster) or engage with our community on our subreddit(neues Fenster). For help with your account, our support team is always available.
Best Regards, The Proton Mail Team
Technical note
We are aware of the issues brought up here(neues Fenster) and here(neues Fenster). As mentioned in this one here(neues Fenster), we are already considering to switch to an implementation in WebAssembly to mitigate the possibility of timing attacks.
However, it is important to note that Curve25519 is a Montgomery curve and therefore these potential timing differences are far less trivial to exploit, as mentioned in the links above.
In our mobile and desktop apps, where timing attack resistance is easier to achieve, the X25519 implementation is already constant-time.
As some people have pointed out, the NIST P-256 curve is supported by Web Crypto, which should be constant-time. However, Curve25519(neues Fenster) is considered to be more modern, safer, and less prone to implementation errors than P-256, which is particularly important because many of our users receive email encrypted by implementations outside of our control.
Once they are generated, keys are controlled by our users and not easily updated, so we wanted to make a future-proof choice of curve. Once we have X25519 in WebAssembly, we’ll have the best of both worlds: the best curve available, in constant time.
Proton Mail and Proton VPN are funded by community contributions. If you would like to support our development efforts, you can upgrade to a paid plan. Thank you for your support.
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