all-in-one privacy solution":["Proton Unlimited es una solución de privacidad todo en uno"],"Black Friday":["Black Friday"],"No ads. Privacy by default.":["Sin anuncios. Privacidad por defecto."],"People before profits":["Primero las personas, luego los beneficios"],"Security through transparency":["Seguridad con transparencia"],"The best Proton Mail ${ BLACK_FRIDAY } deals":["Las mejores ofertas de Proton Mail en el ${ BLACK_FRIDAY }"],"The world’s only community- supported email service":["El único servicio de correo electrónico del mundo respaldado por la comunidad"]},"specialoffer:limited":{"${ hours } hour":["${ hours } hora","${ hours } horas"],"${ hoursLeft }, ${ minutesLeft } and ${ secondsLeft } left":["Tiempo restante: ${ hoursLeft }, ${ minutesLeft } y ${ secondsLeft }"],"${ minutes } minute":["${ minutes } minuto","${ minutes } minutos"],"${ seconds } second":["${ seconds } segundo","${ seconds } segundos"],"Limited time offer":["Oferta por tiempo limitado"]},"specialoffer:listitem":{"Create multiple addresses":["Cree múltiples direcciones"],"Hide-my-email aliases":["Seudónimos de hide-my-email"],"Quickly unsubscribe from newsletters":["Cancele suscripciones a boletines rápidamente"],"Use your own domain name":["Use su propio dominio"]},"specialoffer:logos":{"As featured in":["Tal como aparece en"]},"specialoffer:metadescription":{"Get an encrypted email that protects your privacy":["Obtenga un correo electrónico cifrado que protege su privacidad"]},"specialoffer:metatitle":{"Proton Mail Black Friday Sale - Up to 40% off":["Oferta de Black Friday de Proton Mail: hasta un 40% de descuento"]},"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.":["Aproveche las rebajas de Black Friday y obtenga suscripciones de Proton Mail con hasta un 40 % de descuento. Encontrará las mejores ofertas en planes de correo electrónico seguro cifrado de extremo a extremo."]},"specialoffer:newmetatitle":{"Proton Mail Black Friday sale | Up to 40% off secure email":["Rebajas de Black Friday en Proton Mail | Hasta un 40 % de descuento en correo electrónico seguro"]},"specialoffer:note":{"* Billed at ${ TOTAL_SUM } for the first year":["*Con un costo de ${ TOTAL_SUM } durante el primer año"],"*Billed at ${ TOTAL_SUM } for the first 2 years":["*Con un costo de ${ TOTAL_SUM } durante los primeros 2 años"],"30-day money-back guarantee":["Garantía de devolución de dinero de 30 días"],"Billed at ${ TOTAL_SUM } for the first 2 years":["Con un costo de ${ TOTAL_SUM } durante los primeros 2 años"],"Billed at ${ TOTAL_SUM } for the first year":["Con un costo de ${ TOTAL_SUM } durante el primer año"],"You save ${ SAVE_SUM }":["Ahorre ${ SAVE_SUM }"]},"specialoffer:off":{"${ DISCOUNT } off":["-${ DISCOUNT }"],"${ PERCENT_OFF } off":["-${ PERCENT_OFF }"]},"specialoffer:testimonial":{"I love my ProtonMail":["Amo mi Proton Mail"],"My favorite email service":["Mi servicio de correo electrónico favorito"],"Thanks Proton for keeping us all safe in the complicated internet universe.":["Gracias Proton por mantenernos a salvo en el complicado universo de Internet."],"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":["Obtiene aquello por lo que paga. En el caso de la gran tecnología, cuando uno no paga nada, se acostumbra. Dejé de usar Gmail y cambié a @ProtonMail"]},"specialoffer:time":{"Days":["Días"],"Hours":["Horas"],"Min":["min"]},"specialoffer:title":{"And much more":["Y mucho más"],"Make your inbox yours":["Personalice su bandeja de entrada"],"Safe from trackers":["A salvo de rastreadores"],"Stay organized":["Mantenga el orden"],"Black Friday email deals":["Ofertas en correo electrónico del Black Friday"],"Don’t just take our word for it":["No confíe solo en nuestra palabra"],"Our story":["Nuestra historia"],"Transfer your data from Google in one click":["Transfiera sus datos de Google con un solo clic"]},"specialoffer:tooltip":{"Access blocked content and browse privately. Includes ${ TOTAL_SERVERS }+ servers in ${ TOTAL_COUNTRIES }+ countries, connect up to 10 devices, access worldwide streaming services, malware and ad-blocker, and more.":["Acceda a contenido bloqueado y navegue de forma privada. Incluye ${ TOTAL_SERVERS } servidores en más de ${ TOTAL_COUNTRIES } países, conecta hasta 10 dispositivos, acceda a servicios de transmisión en todo el mundo, malware y bloqueador de anuncios, y más."],"Easily share your calendar with your family, friends or colleagues, and view external calendars.":["Comparta su calendario con familiares, amigos y compañeros fácilmente y consulte calendarios externos."],"Includes support for 1 custom email domain, 10 email addresses, 10 hide-my-email aliases, calendar sharing, and more.":["Incluye compatibilidad con 1 dominio de correo electrónico personalizado, 10 direcciones de correo electrónico, 10 seudónimos de hide-my-email, posibilidad de compartir calendario, etc."],"Includes support for 3 custom email domains, 15 email addresses, unlimited hide-my-email aliases, calendar sharing, and more.":["Incluye compatibilidad con 3 dominios de correo electrónico personalizado, 15 direcciones de correo electrónico, seudónimos ilimitados de hide-my-email, posibilidad de compartir calendario, etc."],"Manage up to 25 calendars, mobile apps, secured with end-to-end encryption, 1-click calendar import from Google, and more.":["Administre hasta 25 calendarios, apps móviles, protegido con cifrado de extremo a extremo, importación de calendario con 1 clic desde Google y más."]},"Status Banner":{"At the moment we are experiencing issues with the Proton VPN service":["En este momento, tenemos problemas con el servicio Proton VPN."],"Learn more":["Más información"]},"Status banner":{"Learn more":["Más información"],"Please note that at the moment we are experiencing issues with the ${ issues[0] } service.":["Tenga en cuenta que, en este momento, estamos experimentando problemas con el servicio ${ issues[0] }."],"We are experiencing issues with one or more services at the moment.":["En este momento, tenemos problemas con uno o más servicios."]},"suggestions":{"Suggestions":["Sugerencias"]},"Support":{"Sub category":["Subacategoria","Subcategorías"]},"Support article":{"${ readingTime } min":["${ readingTime } minuto","${ readingTime } minutos"],"Category":["Categoría","Categorías"],"Didn’t find what you were looking for?":["¿No encontró lo que buscaba?"],"General contact":["Contacto general"],"Get help":["Obtener ayuda"],"Legal contact":["Contacto legal"],"Media contact":["Contacto para medios"],"Partnerships contact":["Contacto para colaboradores"],"Reading":["Lectura"]},"Support categories":{"Browse Proton product support":["Explore el soporte de productos de Proton"]},"Support category":{"There is no article in this category yet.":["Todavía no hay ningún artículo en esta categoría."]},"Support troubleshooting":{"--- Select ---":["--- Seleccionar ---"],"App version":["Versión de la app"],"Browser":["Navegador"],"Check if this helps":["Compruebe si le sirve"],"Choose a category for your question":["Elija la categoría de su pregunta"],"Choose a product":["Elija un producto"],"Did this solve your issue ?":["¿Resolvió su problema?"],"Faster assistance is just a few clicks away — please make your selections":["Obtenga ayuda más rápidamente con tan solo unos clics. Haga su selección."],"No, contact support":["No, contactar a soporte"],"Proton account":["Cuenta de Proton"],"Proton Bridge":["Proton Bridge"],"Proton Calendar":["Calendario de Proton"],"Proton Drive":["Proton Drive"],"Proton for Business":["Proton for Business"],"Proton Mail":["Correo de Proton"],"Proton Pass":["Proton Pass"],"Proton VPN":["VPN de Proton"],"Thank you for your feedback":["Gracias por sus comentarios"],"Troubleshooting":["Solución de problemas"],"What can we help with ?":["¿En qué podemos ayudar?"],"Yes":["Sí"]},"support_modal_search_query":{"Search query":["Consulta"]},"support_search_button":{"Search":["Buscar"]},"support_search_i_am_looking_for":{"I'm looking for":["Busco"]},"SupportForm":{"For a faster resolution, please report the issue from the Bridge app: Help > Report a problem.":["Para una resolución más rápida, reporte el problema desde la app Bridge: Ayuda > Reportar un problema."],"Information":["Información"]},"SupportForm:option":{"Account Security":["Seguridad de la cuenta"],"Contacts":["Contactos"],"Custom email domain":["Dominio de correo electrónico personalizado"],"Email delivery and Spam":["Entrega de correo electrónico y spam"],"Encryption":["Cifrado"],"Login and password":["Inicio de sesión y contraseña"],"Merge aliases and accounts":["Combinar alias y cuentas"],"Migrate to Proton":["Migrar a Proton"],"Notifications":["Notificaciones"],"Other":["Otros"],"Plans and billing":["Planes y facturación"],"Proton for Business":["Proton for Business"],"Sign up":["Regístrese"],"Storage":["Almacenamiento"],"Users, addresses, and identities":["Usuarios, direcciones e identidades"]},"SupportForm:optionIntro":{"Select a topic":["Seleccione un tema"]},"swiss_baseed_feature":{"Swiss based":["Con sede en Suiza"]},"Testimonial":{"Awards":["Premios"],"Customers":["Clientes"],"Featured":["Destacados"],"Go to testimonial source":["Ir a la fuente testimonial"],"Reviews":["Reseñas"],"Videos":["Videos"]},"Text":{"Find the plan that's right for you":["Encuentre el plan adecuado para usted"],"If you need help, check out our ${ supportLink }.":["Si necesita ayuda, consulte nuestra ${ supportLink }."],"The page you’re looking for might have been removed, or it could be an\nold link.":["Es posible que la página que busca haya sido eliminada o que sea un\nenlace antiguo."]},"Title":{"On this page":["En esta página"],"Related articles":["Artículos relacionados"],"Share ${ thisPage }":["Compartir ${ thisPage }"],"Thank you!":["¡Gracias!"],"this page":["esta página"]},"Tooltip":{"More information":["Más información"]},"tooltip_calendar":{"Create up to 20 custom & shareable encrypted calendars. On top of that, add up to 5 calendars from friends, family, colleagues, and organizations.":["Cree hasta 20 calendarios personalizados, compartibles y cifrados. Agregue hasta 5 calendarios de amigos, familiares, colegas y organizaciones."]},"tooltip_vpn":{"Access blocked content and browse privately. Includes ${ TOTAL_SERVERS }+ servers in ${ TOTAL_COUNTRIES }+ countries, highest VPN speed, ${ TOTAL_VPN_CONNECTIONS } VPN connections, worldwide streaming services, malware and ad-blocker, and more.":["Acceda a contenido bloqueado y navegue en privado. Tendrá a su disposición más de ${ TOTAL_SERVERS } servidores en más de ${ TOTAL_COUNTRIES } países, VPN de máxima velocidad, ${ TOTAL_VPN_CONNECTIONS } conexiones VPN, servicios de streaming en todo el mundo, bloqueadores de malware y de anuncios, y mucho más."],"Access blocked content and browse privately. 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Key Transparency for email is a new advanced security feature for Proton Mail that is based on blockchain technology.
To keep your information safe, Proton Mail applies end-to-end encryption (E2EE) automatically whenever you email contacts who also use Proton Mail.
This encryption relies on public key cryptography, which consists of key pairs: a private key and a public key. When you send an email to someone who also uses Proton Mail, the app on your device will automatically encrypt it using their public key, which the app retrieves from Proton’s servers. That person’s Proton Mail app then decrypts your email on their device using their private key.
Depending on your threat model(new window), you might want to make sure you’re emailing the person you intend to by verifying their public key.
While you may have already used our address verification feature to check public keys, we’ve now made this process easier and more accessible for those who need it, whether you’re a public figure, a high-profile organization, or simply concerned about your security. Proton Mail’s new key verification feature automatically checks your contacts’ public keys, so you can be sure you’re emailing the people you intend. Based on a cryptographic concept known as Key Transparency, it lets you check the status of your keys and those of your contacts using the web version of Proton Mail.
It works as follows: Your Proton Mail client (for now, our web app) checks if the public key retrieved from the server matches the one in the auditable Key Transparency directory which is stored on a private blockchain. This ensures that your Proton Mail client encrypts your message with the correct key and thus sends your email to your intended recipient.
Public keys aren’t directly published in a directory. Instead, we use hashed results of Proton Mail addresses and their public keys to protect your privacy.
Please note that this feature is currently in beta. Certain functionality is still being developed and refined.
Also note that even though Proton’s Key Transparency feature leverages blockchain technology, there is no public blockchain, token, or cryptocurrency associated with this feature in its current form.
Periodically, Proton Mail will run an audit to verify that your keys and your contacts’ keys are consistent with what was published in the Key Transparency directory.
To view more information about your and your contact’s public keys, you can check the results of this audit.
2. Go to Settings → All settings → Proton Mail → Encryption and keys and togglethe Verify keys with Key Transparency switch on.
To verify public keys
Sign in to mail.proton.me(new window) and go to Settings → Key verification (at the bottom of the quick settings panel).
You can now check:
If key verification was successful for your own addresses
If key verification detected an issue for your own addresses or your contacts who use Proton Mail
In the rare scenario when Proton Mail detects an issue with your or your contacts’ keys, you may see one of the following messages:
Proton Mail detected that changes you made recently to the keys of this address have not been properly applied — In this case, Proton Mail will prompt you to resolve the key issue in your key settings.
Proton Mail detected that keys used in the past for this address might not be authentic — In this case, Proton Mail will give you the fingerprint of the public key in question (a unique string of letters and numbers), which you can compare with the fingerprint the recipient sees in their account. If the fingerprints match, you can be certain your mail was delivered without being tampered with.
Proton Mail could not verify some changes made to this address’s keys in the past — This might be due to a recent key deletion or a password reset.
This address has been disabled and re-enabled recently. While it was disabled, data shared to this address might not have been encrypted with your keys.
Note that this screen will not list your contacts’ addresses that successfully passed key verification — it will only inform you when it detects an issue.
How to verify your contact’s keys using the composer
You can easily verify your contact’s keys when you send them a message. Using the Proton Mail web app, open the composer and enter the address of the contact you’d like to send a message to.
If Proton Mail successfully verifies their public key, you will see a blue lock icon next to their email address, and a tooltip that says End-to-end encrypted when you hover over it.
If Proton Mail detects an issue with your contact’s keys, you will see a red warning icon next to their email address, and sending messages to this address will be disabled for your security.
Note, it is possible for Proton’s Key Transparency system to give false positives, particularly since the feature is still in beta.If you have questions about Key Transparency or are not sure ifyou have encountered a false positive, please reach out to our support team.
Frequently asked questions
Is Key Transparency available on Proton Mail’s mobile apps?
Key Transparency is currently a beta release and is only available on the Proton Mail web app. It may come to our mobile apps at a later date.
Will Key Transparency only work with my contacts who have also enabled it?
Key Transparency works with all your Proton Mail contacts who use the web version of Proton Mail. They don’t need to enable the feature. Enabling Key Transparency simply lets you check the status of your public keys and those of your contacts.