all-in-one privacy solution":["Proton Unlimited es solución de privacidad más completa"],"Black Friday":["Black Friday"],"No ads. Privacy by default.":["Sin publicidad. La privacidad por bandera."],"People before profits":["Nos importan las personas, no los beneficios"],"Security through transparency":["Seguridad con transparencia"],"The best Proton Mail ${ BLACK_FRIDAY } deals":["Las mejores ofertas del ${ BLACK_FRIDAY } de Proton Mail"],"The world’s only community- supported email service":["El único servicio de correo electrónico con apoyo de la comunidad"]},"specialoffer:limited":{"${ 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":["Crea varias direcciones"],"Hide-my-email aliases":["Alias de hide-my-email"],"Quickly unsubscribe from newsletters":["Date de baja rápidamente de boletines"],"Use your own domain name":["Usa tu propio nombre de dominio"]},"specialoffer:logos":{"As featured in":["Hablan de nosotros"]},"specialoffer:metadescription":{"Get an encrypted email that protects your privacy":["Apuesta por un servicio de correo electrónico cifrado que protege tu privacidad"]},"specialoffer:metatitle":{"Proton Mail Black Friday Sale - Up to 40% off":["Rebajas de Black Friday de Proton: 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.":["Contrata Proton Mail con hasta un 40 % de descuento en las rebajas de Black Friday. Encontrarás nuestros planes de correo electrónico cifrado de extremo a extremo al mejor precio."]},"specialoffer:newmetatitle":{"Proton Mail Black Friday sale | Up to 40% off secure email":["Rebajas de Black Friday en Proton Mail | Correo electrónico seguro con hasta un 40 % de descuento"]},"specialoffer:note":{"* Billed at ${ TOTAL_SUM } for the first year":["* A un precio de ${ TOTAL_SUM } durante el primer año"],"*Billed at ${ TOTAL_SUM } for the first 2 years":["*A un precio de ${ TOTAL_SUM } durante los 2 primeros años"],"30-day money-back guarantee":["Garantía de devolución de 30 días"],"Billed at ${ TOTAL_SUM } for the first 2 years":["A un precio de ${ TOTAL_SUM } durante los 2 primeros años"],"Billed at ${ TOTAL_SUM } for the first year":["A un precio de ${ TOTAL_SUM } durante el primer año"],"You save ${ SAVE_SUM }":["Ahorras ${ SAVE_SUM }"]},"specialoffer:off":{"${ DISCOUNT } off":["−${ DISCOUNT }"],"${ PERCENT_OFF } off":["−${ PERCENT_OFF }"]},"specialoffer:testimonial":{"I love my ProtonMail":["Adoro ProtonMail"],"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 brindarnos protección en este mundo salvaje 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":["Dan justo lo que prometen. Si las grandes tecnológicas te ofrecen algo gratis, se aprovechan de ti, por eso dejé de usar Gmail y me pasé a @ProtonMail"]},"specialoffer:time":{"Days":["días"],"Hours":["horas"],"Min":["min"]},"specialoffer:title":{"And much more":["Y mucho más"],"Make your inbox yours":["Personaliza tu bandeja de entrada"],"Safe from trackers":["Evita los rastreadores"],"Stay organized":["Mantenlo todo en orden"],"Black Friday email deals":["Ofertas en correo electrónico del Black Friday"],"Don’t just take our word for it":["Lee testimonios de otras personas"],"Our story":["Nuestra historia"],"Transfer your data from Google in one click":["Transfiere tus datos de Google con un 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.":["Accede a contenido bloqueado y navega con privacidad. Incluye ${ TOTAL_SERVERS } servidores en más de ${ TOTAL_COUNTRIES } países. Conecta hasta 10 dispositivos, acceder a servicios de streaming de todo el mundo, dispón de la protección de bloqueadores de malware y anuncios, etc."],"Easily share your calendar with your family, friends or colleagues, and view external calendars.":["Comparte tu calendario con familiares, amigos y compañeros fácilmente y consulta 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 alias 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, alias 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.":["Gestiona hasta 25 calendarios protegidos con cifrado de extremo a extremo y con opción, por ejemplo, de importar los de Google con un solo clic."]},"Status Banner":{"At the moment we are experiencing issues with the Proton VPN service":["Hay problemas con el servicio de Proton VPN en estos momentos"],"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.":["Ten presente que, en estos momentos, el servicio de ${ issues[0] } está dando problemas de funcionamiento."],"We are experiencing issues with one or more services at the moment.":["Uno o varios servicios están dando problemas de funcionamiento en estos momentos."]},"suggestions":{"Suggestions":["Sugerencias"]},"Support":{"Sub category":["Subcategoría","Subcategorías"]},"Support article":{"${ readingTime } min":["${ readingTime } min","${ readingTime } min"],"Category":["Categoría","Categorías"],"Didn’t find what you were looking for?":["¿No has encontrado lo que buscabas?"],"General contact":["Contacto para consultas generales"],"Get help":["Obtener ayuda"],"Legal contact":["Contacto para cuestiones legales"],"Media contact":["Contacto para prensa y medios de comunicación"],"Partnerships contact":["Contacto para colaboraciones"],"Reading":["Lectura"]},"Support categories":{"Browse Proton product support":["Consulta la página de asistencia para productos de Proton"]},"Support category":{"There is no article in this category yet.":["No hay ningún artículo aún en esta categoría."]},"Support troubleshooting":{"--- Select ---":["--- Selecciona ---"],"Adding and importing contacts":["Cómo añadir contactos importantes"],"App version":["Versión de la aplicación"],"Automatically save contacts":["Guardado automático de contactos"],"Bridge connection issues with Outlook, Apple Mail or Thunderbird":["Problemas de conexión de Bridge con Outlook, Apple Mail o Thunderbird"],"Browser":["Navegador"],"Check if this helps":["Comprueba a ver si te sirve"],"Choose a category for your question":["Elige la categoría de tu consulta"],"Connectivity errors on Android and iOS":["Errores de conectividad en Android y iOS"],"Contacts":["Contactos"],"Custom domain":["Dominio personalizado"],"Desktop notifications":["Notificaciones de escritorio"],"Did this solve your issue ?":["¿Te ha resultado útil para resolver el problema?"],"Difference between Combined Addresses Mode and Split Addresses Mode":["Diferencias entre los modos de direcciones combinadas y de direcciones divididas"],"Differences between addresses, aliases, and sub-users":["Diferencias entre direcciones, alias y usuarios secundarios"],"Email notifications":["Notificaciones por correo electrónico"],"Email tracking protection":["Protección contra rastreo de correos electrónicos"],"Encryption":["Cifrado"],"Encryption keys management":["Gestión de las claves de cifrado"],"Faster assistance is just a few clicks away — please make your selections":["Haz unos cuantos clics para obtener ayuda más rápidamente. Haz tu selección."],"How to avoid receiving spam messages":["Cómo evitar que lleguen mensajes de spam"],"How to block unwanted email":["Cómo bloquear el correo electrónico no deseado"],"How to configure your email client for Bridge":["Cómo configurar el cliente de correo electrónico para Bridge"],"How to create contact groups":["Cómo crear grupos de contactos"],"How to create or edit CSV contacts":["Cómo crear o editar contactos en CSV"],"How to install Proton Mail Bridge":["Cómo instalar Proton Mail Bridge"],"How to merge duplicate contacts":["Cómo fusionar contactos duplicados"],"How to send encrypted messages to external users":["Cómo enviar mensajes cifrados a usuarios externos"],"How to set up a custom domain":["Cómo configurar un dominio personalizado"],"How to unsubscribe from Apple’s TestFlight notification emails":["Cómo darse de baja de los correos de notificación de TestFlight de Apple"],"How to use auto-reply":["Cómo usar la respuesta automática"],"How to use filters":["Cómo usar los filtros"],"How to use folders and labels":["Cómo usar las carpetas y etiquetas"],"How to use PGP encryption":["Cómo usar el cifrado PGP"],"Invalid password error while setting email client for Bridge":["Error de contraseña no válida al configurar el cliente de correo electrónico para Bridge"],"Login security notification alerts":["Alertas informativas de seguridad para inicios de sesión"],"Manage mailbox appearance":["Gestión de la apariencia de la bandeja de entrada"],"Mobile connectivity and synchronization":["Conectividad móvil y sincronización"],"No, contact support":["No, contactar con el equipo de asistencia"],"Notifications":["Notificaciones"],"Other":["Otro"],"Problems with deleting messages":["Problemas al eliminar mensajes"],"Problems with moving messages":["Problemas al mover mensajes"],"Problems with read/unread message status":["Problemas con los estados \"leídos\" y \"no leídos\" de los mensajes"],"Proton Mail Bridge":["Proton Mail Bridge"],"Proton Mail settings":["Configuración de Proton Mail"],"Push notifications not arriving":["Notificaciones push que no llegan"],"Sending and receiving messages":["Envío y recepción de mensajes"],"Sending and receiving messages limitations":["Limitaciones de envío y recepción de mensajes"],"Sending and receiving troubleshooting":["Soluciones a problemas de envío y recepción"],"Spam filtering, Allow and Block lists":["Listas de filtrado de spam, de mensajes permitidos y de bloqueo"],"Sub-users and organizations":["Usuarios secundarios y organizaciones"],"Thank you for your feedback":["Gracias por tus comentarios"],"Troubleshooting":["Solución de problemas"],"Verify custom domain records & anti-spoofing":["Verificación de registros de dominio personalizados y de cuentas potencialmente peligrosas"],"What can we help with ?":["¿Cómo podemos ayudarte?"],"What if your domain records fail (TXT, MX, SPF, DKIM, DMARC)":["Qué ocurre si fallan tus registros de dominio (TXT, MX, SPF, DKIM, DMARC)"],"What is encrypted on Proton Mail":["Qué está cifrado en Proton Mail"],"Yes":["Sí"]},"support_modal_search_query":{"How to use a custom domain?":["Cómo usar un dominio personalizado"],"Search query":["Consulta de búsqueda"]},"support_modal_search_result":{"Search result":["Resultado de búsqueda"]},"support_modal_title":{"Blog search":["Búsqueda de blog"],"Support search":["Búsqueda de asistencia"]},"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, informa del problema desde la aplicación Bridge: Ayuda > Notificar 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":["Envío de correos electrónico y spam"],"Encryption":["Cifrado"],"Login and password":["Inicio de sesión y contraseña"],"Merge aliases and accounts":["Fusionar seudónimos y cuentas"],"Migrate to Proton":["Migrar a Proton"],"Notifications":["Notificaciones"],"Other":["Otro"],"Plans and billing":["Planes y facturación"],"Proton for Business":["Proton for Business"],"Sign up":["Regístrate"],"Storage":["Almacenamiento"],"Users, addresses, and identities":["Usuarios, direcciones e identidades"]},"SupportForm:optionIntro":{"Select a topic":["Selecciona un tema"]},"swiss_baseed_feature":{"Swiss based":["Con sede en Suiza"]},"Testimonial":{"Awards":["Premios"],"Customers":["Clientes"],"Featured":["Destacado"],"Go to testimonial source":["Ir a la fuente del testimonio"],"Reviews":["Opiniones"],"Videos":["Vídeos"]},"Text":{"Find the plan that's right for you":["Encuentra el plan más adecuado para tus necesidades"],"If you need help, check out our ${ supportLink }.":["Si necesitas ayuda, consulta 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 buscas 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.":["Crea hasta 20 calendarios personalizados y cifrados que puedes compartir con otras personas, y añade además hasta 5 calendarios de amigos, familiares, compañeros 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.":["Accede a contenido bloqueado y navega en privado. Tendrás a tu 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. Includes ${ TOTAL_SERVERS }+ servers in ${ TOTAL_COUNTRIES }+ countries, highest VPN speed, 10 VPN connections, worldwide streaming services, malware and ad-blocker, and more.":["Accede a contenido bloqueado y navega en privado. Tendrás a tu disposición más de ${ TOTAL_SERVERS } servidores en más de ${ TOTAL_COUNTRIES } países, VPN de máxima velocidad, 10 conexiones VPN, servicios de streaming en todo el mundo, bloqueadores de malware y de anuncios, y mucho más."]},"version_history_label":{"Version history":["Historial de versiones"]},"version_history_tooltip":{"Store up to ${ versionHistoryNumber } versions of each file for up to ${ years } years":["Almacena hasta ${ versionHistoryNumber } versiones de cada archivo durante ${ years } años como máximo"]},"VideoModal":{"Get started in 2 minutes":["Primeros pasos en 2 minutos"]},"videosButtonLabel":{"Get started with videos":["Primeros pasos con vídeos"]},"vpn_features_link":{"View VPN plans":["Ver planes de VPN"]},"vpn_features_useCase":{"Access blocked content and browse privately":["Accede a contenido bloqueado y navega con privacidad"]}}},"unleashApi":"https://account.proton.me/api"};
// We need to import data (the framework context) from the server
// This Astro feature with define:vars works well but creates an inline script
// So we can't directly import the initFramework helper, we have to store the context
window.frameworkContext = frameworkContext;
})();
Proton Pass is an end-to-end encrypted(new window) password manager based on the same well-tested encryption that secures the rest of the Proton ecosystem. Proton Pass is unique in that it was designed from the ground up to have a strong focus on privacy and security. It therefore has a more complete encryption model than most other password managers.
Proton Pass doesn’t just encrypt the password field but applies end-to-end encryption to all fields, including usernames, web addresses, and all data contained in the encrypted notes section.
This means Proton Pass prevents anyone, including Proton itself, from knowing which online services you subscribe to or have accounts with. This information, much like your emails or your browsing history, can reveal a lot about you and must be protected if you want to maintain your privacy.
The design of Proton Pass uses end-to-end encryption, guaranteeing that all cryptographic operations, including key generation and data encryption, are performed locally on your device. This means that your unencrypted data cannot be accessed by Proton or shared with any third parties. Proton servers never have access to your unencrypted keys, data, or credentials, including your Proton Account password.
Data model
Proton Pass enables you to store various types of information securely, including:
Credentials: You can store access credentials to websites or apps, which may include a username or email, a password, and a second-factor authentication code (TOTP).
Notes: You can securely store any information that doesn’t fit in a credential field in this free-form text field, including license numbers, codes, or simple text notes.
Aliases: You can also create email aliases with Proton Pass. This feature enables you to create randomly generated email addresses that you can use in place of your real email addresses for online accounts. This makes it easy to shut down an alias that’s linked to a service that’s breached or begins sending you spam without affecting your other accounts.
Proton Pass stores all these items within a secure vault. Vaults provide a convenient way for you to organize and (in the future) securely share your data.
Encryption model
Proton Pass takes a comprehensive approach to ensuring maximum security and privacy for all user data. All cryptographic operations occur locally on your device, and any data transmitted to the server is always encrypted. Proton never has access to the plaintext keys required to decrypt user data, making it impossible for Proton to decrypt stored data, even if requested by third parties.
Proton Pass also benefits from the same advanced encryption we utilize for authentication in Proton Mail. This includes using a hardened version of the Secure Remote Password (SRP) protocol that offers stronger security guarantees against man-in-the-middle (MITM) attacks. Our implementation means that even an attacker who can arbitrarily read, modify, delay, destroy, repeat, or fabricate messages between Proton and a user in an undetectable fashion is limited to checking only a single password guess per login attempt, which is equivalent to just trying to log in directly. This way, even if Proton is compromised and acts maliciously, password-equivalent information is never revealed.
Each Proton Pass user has an asymmetric user key. Proton Pass encrypts this user key as follows:
Accounts that use a single account password: Proton Pass encrypts the user key with a bcrypt hash of the account password and the account salt.
Accounts that use our multiple account passwords feature: Proton Pass encrypts the user key with a bcrypt hash of the key password and the account salt.
The user key is used to open all shares you can access, meaning it must be secured. The bcrypt password hashing implementation used by Proton Pass is more robust and secure than PBKDF2, which has led to breaches in other password managers.
When you create a vault, Proton Pass generates a 32-byte random vault key. This key is encrypted and signed with your user key, ensuring only you can decrypt the vault key and nobody (not even Proton) can read or create new vault keys. If several users have access to the same vault, Proton Pass will encrypt the vault key with each user’s public user key. This makes it easy to securely share access to vaults.
Once you have access to the vault key, all items in Proton Pass are encrypted using 256-bit AES-GCM.
Item encryption
Each vault can contain multiple items, such as logins, notes, and aliases. When you create a new item, Proton Pass generates a 32-byte random item key. Proton Pass encrypts that item using the newly generated item key, which itself is then encrypted with your vault key. Both the item key and the item data are encrypted using 256-bit AES-GCM.
Whenever you update an item, Proton Pass encrypts the new data using the previously generated corresponding item key. By using individual item keys for each item, Proton Pass lets you share specific items with other users without sharing the vault key, allowing for more fine-tuned access control.
This approach enables Proton Pass to respect the security principle of least privilege by providing the minimum number of cryptographic keys necessary to access only the data shared.
Sharing
The Proton ecosystem already has open-source, publicly audited, and battle-tested secure sharing encryption models for Proton Drive and Proton Calendar, and we’ve leveraged this experience to design Proton Pass. The Proton Pass encryption model enables you to share your vaults with others, and we plan on adding more sophisticated sharing functionalities as Proton Pass evolves. Currently, you must be a vault administrator to share your vault keys.
Sharing encrypted information requires sharing and distributing public keys, which creates the potential for man-in-the-middle (MITM) attacks, specifically the distribution of fake public keys. In addition to user keys, each Proton user has one or more address keys for each email address associated with their account. This address key is a public key linked to a verifiable identity and published in Proton’s Key Transparency system, ensuring they can’t be maliciously modified by an attacker. We’ll share more information about Proton’s Key Transparency system in the future.
If you’re the vault administrator, you can share your vault key and Proton Pass will encrypt it with your recipient’s address key, ensuring only they can access it.
After your intended recipient receives your encrypted vault key, they will validate its signature using your address key. This step verifies that the invitation legitimately came from you. Once the signature has been validated, Proton Pass will encrypt the vault key using your recipient’s user key and store it securely.
Conclusion
Like all Proton services, Proton Pass will be open source upon release. Anyone will be able to consult the source code to verify our security model. As with our other services, Proton Pass will also undergo regular independent security audits and these audit reports will be shared publicly as soon as they are available.
Finally, for interested security researchers, Proton Pass is eligible for Proton’s Bug Bounty program(new window) that offers awards of up to $10,000 for the discovery of bugs in Proton’s software.
This work was conducted by Adrià Casajús, Son Nguyen Kim, Carlos Quintana, Daniel Huigens, and Lara Bruseghini from the Proton identity and cryptography teams.
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