all-in-one privacy solution":["Proton Unlimited é uma solução única de privacidade"],"Black Friday":["Black Friday"],"No ads. Privacy by default.":["Sem anúncios. Privacidade por padrão."],"People before profits":["Pessoas acima do lucro"],"Security through transparency":["Segurança por meio da transparência"],"The best Proton Mail ${ BLACK_FRIDAY } deals":["As melhores ofertas de ${ BLACK_FRIDAY } do Proton Mail"],"The world’s only community- supported email service":["O único serviço de e-mail do mundo apoiado pela comunidade"]},"specialoffer:limited":{"${ hours } hour":["${ hours } hora","${ hours } horas"],"${ hoursLeft }, ${ minutesLeft } and ${ secondsLeft } left":["${ hoursLeft }, ${ minutesLeft }, e ${ secondsLeft } restantes"],"${ minutes } minute":["${ minutes } minuto","${ minutes } minutos"],"${ seconds } second":["${ seconds } segundo","${ seconds } segundos"],"Limited time offer":["Oferta por tempo limitado"]},"specialoffer:listitem":{"Create multiple addresses":["Crie vários endereços"],"Hide-my-email aliases":["Use aliases do hide-my-email"],"Quickly unsubscribe from newsletters":["Cancele a assinatura de newsletters rapidamente"],"Use your own domain name":["Use seu próprio nome de domínio"]},"specialoffer:logos":{"As featured in":["Destaques"]},"specialoffer:metadescription":{"Get an encrypted email that protects your privacy":["Obtenha um e-mail criptografado que proteja sua privacidade"]},"specialoffer:metatitle":{"Proton Mail Black Friday Sale - Up to 40% off":["Oferta de Black Friday do Proton Mail - Até 40% de desconto"]},"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.":["Obtenha até 40% de desconto nas assinaturas do Proton Mail nesta Black Friday. Confira ótimas ofertas em nossos planos de e-mail seguro com criptografia de ponta a ponta."]},"specialoffer:newmetatitle":{"Proton Mail Black Friday sale | Up to 40% off secure email":["Oferta de Black Friday do Proton Mail - Até 40% de desconto no e-mail protegido"]},"specialoffer:note":{"* Billed at ${ TOTAL_SUM } for the first year":["* Com o preço de ${ TOTAL_SUM } no primeiro ano"],"*Billed at ${ TOTAL_SUM } for the first 2 years":["*Com o preço de ${ TOTAL_SUM } nos primeiros dois anos"],"30-day money-back guarantee":["Garantia de reembolso de 30 dias"],"Billed at ${ TOTAL_SUM } for the first 2 years":["Com o preço de ${ TOTAL_SUM } nos primeiros dois anos"],"Billed at ${ TOTAL_SUM } for the first year":["Com o preço de ${ TOTAL_SUM } no primeiro ano"],"You save ${ SAVE_SUM }":["Economize ${ SAVE_SUM }"]},"specialoffer:off":{"${ PERCENT_OFF } off":["-${ PERCENT_OFF }"]},"specialoffer:testimonial":{"I love my ProtonMail":["Adoro ProtonMail"],"My favorite email service":["Meu serviço favorito de e-mail"],"Thanks Proton for keeping us all safe in the complicated internet universe.":["Agradecemos ao Proton por nos manter a salvo no complicado universo da 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":["Você recebe pelo que paga. No caso das grandes tecnologias, você se acostuma quando não paga nada. Parei de usar o Gmail e troquei para o @ProtonMail"]},"specialoffer:time":{"Days":["Dias"],"Hours":["Horas"],"Min":["Min"]},"specialoffer:title":{"And much more":["E muito mais"],"Safe from trackers":["A salvo de rastreadores"],"Stay organized":["Mantenha tudo organizado"],"Black Friday email deals":["Ofertas de e-mail da Black Friday"],"Don’t just take our word for it":["Não confie apenas em nossa palavra"],"Make your inbox yours":["Deixe sua caixa de entrada do seu jeito"],"Our story":["Nossa história"],"Transfer your data from Google in one click":["Transfira seus dados do Google com um clique"]},"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.":["Acesse conteúdo bloqueado e navegue com privacidade. Inclui mais de ${ TOTAL_VPN_SERVERS } servidores em mais de ${ TOTAL_VPN_COUNTRIES } países, conexão com até 10 dispositivos, acesso a serviços de streaming do mundo todo, um bloqueador de anúncios e malware e muito mais."],"Easily share your calendar with your family, friends or colleagues, and view external calendars.":["Compartilhe facilmente seus calendários com amigos, familiares ou colegas e visualize calendários externos."],"Includes support for 1 custom email domain, 10 email addresses, 10 hide-my-email aliases, calendar sharing, and more.":["Inclui suporte para 1 domínio de e-mail personalizado, 10 endereços de e-mail, 10 aliases do hide-my-email, compartilhamento de calendário e muito mais."],"Includes support for 3 custom email domains, 15 email addresses, unlimited hide-my-email aliases, calendar sharing, and more.":["Inclui suporte para 3 domínios de e-mail personalizados, 15 endereços de e-mail, aliases ilimitados do hide-my-email, compartilhamento de calendário e muito mais."],"Manage up to 25 calendars, mobile apps, secured with end-to-end encryption, 1-click calendar import from Google, and more.":["Gerencie até 25 calendários, apps para dispositivos móveis, protegidos com criptografia de ponta a ponta, importação de calendário com 1 clique do Google e muito mais."]},"Status Banner":{"At the moment we are experiencing issues with the Proton VPN service":["No momento estamos enfrentando problemas com o serviço Proton VPN"]},"Status banner":{"Learn more":["Saiba mais"],"Please note that at the moment we are experiencing issues with the ${ issues[0] } service.":["No momento, estamos com problemas no serviço ${ issues[0] }."],"We are experiencing issues with one or more services at the moment.":["No momento, estamos com problemas em um ou mais serviços."]},"steps":{"Step":["Etapa"]},"suggestions":{"Suggestions":["Sugestões"]},"Support":{"Sub category":["Subcategoria","Subcategorias"]},"Support article":{"${ readingTime } min":["${ readingTime } min","${ readingTime } min"],"Category":["Categoria","Categorias"],"Didn’t find what you were looking for?":["Não encontrou o que procura?"],"General contact":["Contato geral"],"Get help":["Obter ajuda"],"Legal contact":["Contato jurídico"],"Media contact":["Contato de mídia"],"Partnerships contact":["Contato de parcerias"],"Reading":["Leitura"]},"Support Form Platform option":{"VPN for Android TV":["VPN para Android TV"],"VPN for Apple TV":["VPN para Apple TV"],"VPN for Chromebook":["VPN para Chromebook"]},"Support troubleshooting":{"App version":["Versão do aplicativo"],"Browser":["Navegador"],"Check if this helps":["Confira se isso ajuda"],"Choose a product":["Selecione um produto"],"Did this solve your issue?":["Isso resolveu seu problema?"],"Faster assistance is just a few clicks away":["Assistência mais rápida a apenas alguns cliques de distância"],"How can we help?":["Como podemos ajudar?"],"No, contact support":["Não, entrar em contato com o suporte"],"Please fill out one field after another":["Preencha os campos em sequência"],"Please make your selections":["Faça suas seleções"],"Proton account":["Conta Proton"],"Proton for Business":["Proton for Business"],"Thank you for your feedback":["Agradecemos pelo feedback"],"What can we help with?":["Com o que podemos ajudar?"],"Yes":["Sim"]},"support_modal_search_query":{"Search query":["Consulta de pesquisa"]},"support_search_button":{"Search":["Pesquisar"]},"support_search_i_am_looking_for":{"I'm looking for":["Estou procurando"]},"SupportForm":{"For a faster resolution, please report the issue from the Bridge app: Help > Report a problem.":["Para uma resolução mais rápida, informe o problema no aplicativo Bridge: Ajuda > Comunicar um problema."],"Information":["Informações"]},"SupportForm:option":{"Account Security":["Segurança da conta"],"Contacts":["Contatos"],"Custom email domain":["Domínio de e-mail personalizado"],"Email delivery and Spam":["Entrega de e-mail e spam"],"Encryption":["Criptografia"],"Login and password":["Início de sessão e senha"],"Merge aliases and accounts":["Combinar alias e contas"],"Migrate to Proton":["Migrar para a Proton"],"Notifications":["Notificações"],"Other":["Outros"],"Plans and billing":["Planos e faturamento"],"Proton for Business":["Proton for Business"],"Sign up":["Criar conta"],"Storage":["Armazenamento"],"Users, addresses, and identities":["Usuários, endereços e identidades"]},"SupportForm:optionIntro":{"Select a topic":["Selecione um tópico"]},"Testimonial":{"Awards":["Prêmios"],"Customers":["Clientes"],"Featured":["Em destaque"],"Go to testimonial source":["Ir para a página inicial de depoimentos"],"Open source of award":["Abrir origem do prêmio"],"Open source of quote":["Abrir origem da citação"],"Reviews":["Avaliações"],"Videos":["Vídeos"],"Watch on TikTok":["Assistir no TikTok"],"Watch on YouTube":["Assistir no Youtube"]},"TestimonialCategory":{"Awards":["Prêmios"],"Customers":["Clientes"],"Featured":["Em 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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.":["Acesse conteúdo bloqueado e navegue com privacidade. Inclui mais de ${ TOTAL_VPN_SERVERS } servidores em mais de ${ TOTAL_VPN_COUNTRIES } países, a maior velocidade de VPN, ${ TOTAL_VPN_CONNECTIONS } conexões VPN, serviços de streaming do mundo todo, bloqueador de anúncios e malware e muito mais."]},"vpn_servers":{"Get Proton VPN Plus":["Obter Proton VPN Plus"]},"wallet_signup_2024:Action":{"Get Proton Wallet":["Obtenha o 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":["Guia sobre bitcoins"],"Proton Wallet news":["Novidades do Proton Wallet"],"Proton Wallet support":["Suporte do Proton Wallet"]},"wallet_signup_2024:Pricing":{"Includes everything in Proton Unlimited and":["Inclui todos os recursos do Proton Unlimited e"],"Limited availability":["Disponibilidade limitada"],"The easiest way to securely own, send, and receive Bitcoin":["A maneira mais fácil de guardar, enviar e receber bitcoins com segurança"]},"wallet_signup_2024:ProductRange":{"Discover Proton Wallet":["Conheça o Proton Wallet"],"Store and transact Bitcoin privately with an encrypted self-custody wallet.":["Guarde e negocie bitcoins de modo privado usando uma carteira com autocustódia criptografada."]},"wallet_signup_2024:wallet bitcoin":{"Learn about Bitcoin, the Internet's value network.":["Saiba mais sobre bitcoins, a rede de valor da internet."]},"wallet_signup_2024:wallet overview":{"Ensure you're always in control of your Bitcoin.":["Tenha certeza de ter sempre o controle das suas bitcoins."]},"wallet_signup_2024:wallet security":{"The encrypted, open-source wallet that puts you in control.":["A carteira criptografada e de código aberto que coloca você no controle."]}}},"base":"blog","cdn":{"enabledForAssets":true,"enabledForImages":true,"url":"https://pmecdn.protonweb.com/"},"unleashApi":"https://account.proton.me/api"};
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What is zero-access encryption and why is it important for security? | Proton
Most of us would not give our private, personal information to strangers and then trust them not to leak it. But that’s essentially what we do every time we store chat histories, email, documents, and pictures on the cloud. When you save a document to Google Drive, a photo album to iCloud, or an intimate conversation to Facebook Messenger, you are trusting that this information will not be breached or misused.
There are ways, however, to encrypt your data so that only you can access it, and zero-access encryption is one of these methods. Zero-access encryption is a way of protecting data at rest — that is, while the information is sitting in storage on the cloud. With this type of encryption, even if hackers were to breach the provider’s servers and steal your files, they would not be able to decrypt the data. Zero-access encryption ensures that only you, the data owner, have the technical ability to read your data.
How does zero-access encryption work?
Zero-access encryption is just what it sounds like: a type of encryption(nova janela) for data at rest that renders digital files inaccessible to the service provider. The files can only be decrypted using the user’s private encryption key. Because the server does not have access to the user’s private encryption key, once the files are encrypted with the user’s public encryption key they are no longer accessible to the server or the server’s owner. When the data owner wants to view their data, they request the encrypted files from the server and decrypt them locally on their device, not on the server.
How is zero-access encryption different from end-to-end encryption?
At Proton Mail, we use both zero-access encryption and end-to-end encryption(nova janela) to protect your data. To understand the difference, consider two scenarios:
1. Someone using a Gmail account sends an email to a Proton Mail account. When it arrives at Proton Mail, our servers can read that email because Gmail does not support end-to-end encryption. However, after receiving the email, we encrypt it immediately using the Proton Mail account owner’s public encryption key. Afterwards, we are no longer able to decrypt the message. In fact, the encrypted email can now only be decrypted by the Proton Mail account owner.
2. Someone using a Proton Mail account sends an email to another Proton Mail email address. The email is encrypted on the sender’s device using the public encryption key of the recipient before being transferred to the Proton Mail server and to the recipient. Thus, the message is already encrypted before it reaches our server, and only the sender and the recipient have the ability to decrypt the email. This is end-to-end encryption.
As you can see from these examples, end-to-end encryption is the stronger of these two types of encryption because Proton Mail never sees the unencrypted message. Zero-access encryption does prevent the messages in your mailbox from being shared with third parties or leaked in the event of a data breach, but those messages are accessible to Proton Mail servers for a split second before the message is encrypted. For these reasons, we generally recommend that for highly sensitive conversations, both parties use Proton Mail to take advantage of the stronger end-to-end encryption.
Zero-access encryption solves big security problems
Most companies do not implement zero-access encryption either because they sell your private information to advertisers (Google, Facebook, etc.) or because the technical challenges of implementing it are too great.
Instead, they might use regular encryption where they retain control over the encryption keys. This is like storing the key to the lock with the lock itself and creates many vulnerabilities. For example, if servers are ever hacked, your private conversations can be leaked (like in the Yahoo! breach(nova janela) of all 3 billion of its accounts).
Furthermore, this approach also leaves data open for misuse, either by rogue employees or unscrupulous third parties, such as in the Cambridge Analytica/Facebook scandal(nova janela). This data can also be made accessible to government surveillance agencies or sold outright to advertisers.
We drastically reduce these security and privacy vulnerabilities by using zero-access encryption to ensure that we ourselves do not have access to your data. That way, even if somehow Proton Mail servers are breached, the contents of users’ private emails will still be encrypted. Both zero-access encryption and end-to-end encryption are essential to ensure good protection against data breaches and privacy violations in the digital age, and for this reason, they are highly recommended by experts(nova janela) and important for complying with data protection laws such as the GDPR law.
Thousands of businesses of all sizes were impacted by cybercrime in 2024. Here
are the top cybersecurity threats we expect companies to face in 2025—and how
Proton Pass can protect your business.