all-in-one privacy solution":["Proton Unlimited jest kompleksowym rozwiązaniem zapewniającym prywatność"],"Black Friday":["Czarny Piątek"],"No ads. Privacy by default.":["Brak reklam. Prywatność w standardzie."],"People before profits":["Ludzie przed zyskiem"],"Security through transparency":["Bezpieczeństwo dzięki przejrzystości"],"The best Proton Mail ${ BLACK_FRIDAY } deals":["Najlepsze oferty Proton Mail ${ BLACK_FRIDAY }"],"The world’s only community- supported email service":["Jedyna na świecie usługa e-mail wspierana przez społeczność"]},"specialoffer:limited":{"${ hours } hour":["${ hours } godzina","${ hours } godziny","${ hours } godzin","${ hours } godziny"],"${ hoursLeft }, ${ minutesLeft } and ${ secondsLeft } left":["Pozostało: ${ hoursLeft }, ${ minutesLeft } i ${ secondsLeft }"],"${ minutes } minute":["${ minutes } minuta","${ minutes } minuty","${ minutes } minut","${ minutes } minuty"],"${ seconds } second":["${ seconds } sekunda","${ seconds } sekundy","${ seconds } sekund","${ seconds } sekundy"],"Limited time offer":["Oferta ograniczona czasowo"]},"specialoffer:listitem":{"Create multiple addresses":["Utwórz wiele adresów"],"Hide-my-email aliases":["Aliasy hide-my-email"],"Quickly unsubscribe from newsletters":["Szybko anuluj subskrypcję biuletynów"],"Use your own domain name":["Korzystaj z własnej nazwy domeny"]},"specialoffer:logos":{"As featured in":["Opinie naszych klientów"]},"specialoffer:metadescription":{"Get an encrypted email that protects your privacy":["Uzyskaj zaszyfrowaną usługę e-mail, która chroni Twoją prywatność"]},"specialoffer:metatitle":{"Proton Mail Black Friday Sale - Up to 40% off":["Wyprzedaż Proton Mail z okazji Czarnego Piątku – uzyskaj do 40% zniżki"]},"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.":["Uzyskaj do 40% zniżki na subskrypcje Proton Mail w ten Czarny Piątek. Znajdź wspaniałe oferty naszych bezpiecznych planów usługi poczty elektronicznej w szyfrowaniu end-to-end."]},"specialoffer:newmetatitle":{"Proton Mail Black Friday sale | Up to 40% off secure email":["Wyprzedaż Proton Mail z okazji Czarnego Piątku | Do 40% zniżki na bezpieczną pocztę elektroniczną"]},"specialoffer:note":{"* Billed at ${ TOTAL_SUM } for the first year":["* Płatne ${ TOTAL_SUM } za pierwszy rok"],"*Billed at ${ TOTAL_SUM } for the first 2 years":["* Płatne ${ TOTAL_SUM } za pierwsze 2 lata"],"30-day money-back guarantee":["30-dniowa gwarancja zwrotu pieniędzy"],"Billed at ${ TOTAL_SUM } for the first 2 years":["Płatne ${ TOTAL_SUM } za pierwsze 2 lata"],"Billed at ${ TOTAL_SUM } for the first year":["Płatne ${ TOTAL_SUM } za pierwszy rok"],"You save ${ SAVE_SUM }":["Oszczędzasz ${ SAVE_SUM }"]},"specialoffer:off":{"${ PERCENT_OFF } off":["-${ PERCENT_OFF }"]},"specialoffer:testimonial":{"I love my ProtonMail":["Uwielbiam ProtonMail"],"My favorite email service":["Moja ulubiona usługa e-mail"],"Thanks Proton for keeping us all safe in the complicated internet universe.":["Dziękuję Protonowi za dbanie o nasze bezpieczeństwo w skomplikowanym internetowym uniwersum."],"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":["Dostajesz to, za co płacisz. W przypadku przedsiębiorstw big tech, jeśli nie płacisz nic, zostaniesz wykorzystany. Przestałam korzystać z Gmail i przeniosłam się na @ProtonMail"]},"specialoffer:time":{"Days":["Dni"],"Hours":["Godz."],"Min":["Min"]},"specialoffer:title":{"And much more":["I wiele więcej"],"Safe from trackers":["Żadnych elementów śledzących"],"Stay organized":["Dbaj o dobrą organizację"],"Black Friday email deals":["Oferty e-mailowe na Czarny Piątek"],"Don’t just take our word for it":["Nie musisz wierzyć nam na słowo"],"Make your inbox yours":["Niech skrzynka odbiorcza należy tylko do Ciebie"],"Our story":["Nasza historia"],"Transfer your data from Google in one click":["Przenieś dane z Google jednym kliknięciem"]},"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.":["Uzyskaj dostęp do zablokowanych treści i przeglądaj prywatnie Internet. Obejmuje ponad ${ TOTAL_VPN_SERVERS } serwerów w ponad ${ TOTAL_VPN_COUNTRIES } krajach z możliwością połączenia do 10 urządzeń, a także dostęp do globalnych usług streamingu, blokadę reklam, złośliwego oprogramowania i wiele więcej."],"Easily share your calendar with your family, friends or colleagues, and view external calendars.":["Łatwo udostępniaj swój kalendarz rodzinie, znajomym oraz współpracownikom i wyświetla kalendarze zewnętrzne."],"Includes support for 1 custom email domain, 10 email addresses, 10 hide-my-email aliases, calendar sharing, and more.":["Zawiera obsługę 1 niestandardowej domeny e-mail, 10 adresów e-mail, 10 aliasów hide-my-email, udostępnianie kalendarza i nie tylko."],"Includes support for 3 custom email domains, 15 email addresses, unlimited hide-my-email aliases, calendar sharing, and more.":["Obejmuje obsługę 3 niestandardowych domen e-mail, 15 adresów e-mail, nielimitowane aliasy hide-my-email, udostępnianie kalendarza i nie tylko."],"Manage up to 25 calendars, mobile apps, secured with end-to-end encryption, 1-click calendar import from Google, and more.":["Zarządzanie nawet 25 kalendarzami, aplikacje mobilne, bezpieczne szyfrowanie metodą end-to-end, importowanie kalendarza za pomocą jednego kliknięcia z Google i więcej."]},"Status Banner":{"At the moment we are experiencing issues with the Proton VPN service":["W tej chwili mamy problemy z usługą Proton VPN"]},"Status banner":{"Learn more":["Dowiedz się więcej"],"Please note that at the moment we are experiencing issues with the ${ issues[0] } service.":["Uwaga: obecnie występują problemy z usługą ${ issues[0] }."],"We are experiencing issues with one or more services at the moment.":["Mamy problemy z co najmniej jedną usługą."]},"steps":{"Step":["Krok"]},"suggestions":{"Suggestions":["Sugestie"]},"Support":{"Sub category":["Podkategoria","Podkategorie","Podkategorii","Podkategorii"]},"Support article":{"${ readingTime } min":["${ readingTime } min","${ readingTime } min","${ readingTime } min","${ readingTime } min"],"Category":["Kategoria","Kategorie","Kategorii","Kategorii"],"Didn’t find what you were looking for?":["Nie znaleziono szukanej frazy?"],"General contact":["Skontaktuj się, wykorzystując ogólne zapytanie"],"Get help":["Uzyskaj pomoc"],"Legal contact":["Skontaktuj się z działem prawnym"],"Media contact":["Skontaktuj się z zespołem medialnym"],"Partnerships contact":["Skontaktuj się z zespołem ds. partnerstwa"],"Reading":["Odczytywanie"]},"Support Form Platform option":{"VPN for Android TV":["VPN dla Android TV"],"VPN for Apple TV":["VPN na Apple TV"],"VPN for Chromebook":["VPN dla Chromebooka"]},"Support troubleshooting":{"App version":["Wersja aplikacji"],"Browser":["Przeglądarka"],"Check if this helps":["Sprawdź, czy to pomoże"],"Choose a product":["Wybierz produkt"],"Did this solve your issue?":["Czy Twój problem został rozwiązany?"],"Faster assistance is just a few clicks away":["Szybsze wsparcie uzyskasz w kilka kliknięć"],"How can we help?":["Jak możemy pomóc?"],"No, contact support":["Nie, skontaktuj się z pomocą techniczną"],"Please fill out one field after another":["Wypełnij pola jedno po drugim"],"Please make your selections":["Dokonaj wyboru"],"Proton account":["Konto Proton"],"Proton for Business":["Proton for Business"],"Thank you for your feedback":["Dziękujemy za podzielenie się opinią"],"What can we help with?":["W czym możemy pomóc?"],"Yes":["Tak"]},"support_modal_search_query":{"Search query":["Zapytanie wyszukiwania"]},"support_search_button":{"Search":["Szukaj"]},"support_search_i_am_looking_for":{"I'm looking for":["Szukam"]},"SupportForm":{"For a faster resolution, please report the issue from the Bridge app: Help > Report a problem.":["W celu szybszego rozwiązania problemu dokonaj zgłoszenia przez aplikację Bridge: Pomoc > Zgłoś problem."],"Information":["Informacje"]},"SupportForm:option":{"Account Security":["Bezpieczeństwo konta"],"Contacts":["Kontakty"],"Custom email domain":["Niestandardowa domena e-mail"],"Email delivery and Spam":["Dostarczanie wiadomości e-mail i spam"],"Encryption":["Szyfrowanie"],"Login and password":["Login i hasło"],"Merge aliases and accounts":["Scalanie aliasów i kont"],"Migrate to Proton":["Migracja do Proton"],"Notifications":["Powiadomienia"],"Other":["Inne"],"Plans and billing":["Plany i rozliczenia"],"Proton for Business":["Proton for Business"],"Sign up":["Rejestracja"],"Storage":["Przestrzeń dyskowa"],"Users, addresses, and identities":["Użytkownicy, adresy i tożsamości"]},"SupportForm:optionIntro":{"Select a topic":["Wybierz temat"]},"Testimonial":{"Awards":["Nagrody"],"Customers":["Klienci"],"Featured":["Wyróżnione"],"Go to testimonial source":["Przejdź do źródła referencji"],"Open source of award":["Otwórz źródło nagrody"],"Open source of quote":["Otwórz źródło cytatu"],"Reviews":["Opinie"],"Videos":["Pliki wideo"],"Watch on TikTok":["Oglądaj na TikTok"],"Watch on YouTube":["Oglądaj na YouTube"]},"TestimonialCategory":{"Awards":["Nagrody"],"Customers":["Klienci"],"Featured":["Wyróżnione"],"Media":["Multimedia"],"Reviews":["Opinie"],"Videos":["Pliki wideo"]},"Text":{"If you need help, check out our ${ supportLink }.":["Jeśli potrzebujesz pomocy, sprawdź naszą ${ supportLink }."],"The page you’re looking for might have been removed, or it could be an\nold link.":["Strona, której szukasz, mogła zostać usunięta lub link jest przestarzały."],"Your question may already have an answer in our knowledge base:":["Na Twoje pytanie może już istnieć odpowiedź w bazie wiedzy:"]},"Title":{"On this page":["Na tej stronie"],"Page not found":["Nie znaleziono strony"],"Related articles":["Powiązane artykuły"],"Share ${ thisPage }":["Udostępnij ${ thisPage }"],"Switch to Proton Pass - Contact us":["Przejdź na Proton Pass – skontaktuj się z nami"],"Thank you!":["Dziękujemy!"],"this page":["tę stronę"]},"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.":["Uzyskaj dostęp do zablokowanych treści i przeglądaj prywatnie Internet. Obejmuje ponad ${ TOTAL_VPN_SERVERS } serwerów w ponad ${ TOTAL_VPN_COUNTRIES } krajach, najwyższe prędkości VPN, ${ TOTAL_VPN_CONNECTIONS } połączeń VPN, usługi streamingu na całym świecie, blokowanie reklam oraz złośliwego oprogramowania i wiele więcej."]},"vpn_servers":{"Get Proton VPN Plus":["Wybierz plan Proton VPN Plus"]},"wallet_signup_2024:Action":{"Get Proton Wallet":["Wybierz Proton Wallet"]},"wallet_signup_2024:Homepage hero product link title":{"Wallet":["Portfel"]},"wallet_signup_2024:Homepage product navigation bar":{"Wallet":["Portfel"]},"wallet_signup_2024:menu item":{"Bitcoin guide":["Przewodnik po systemie Bitcoin"],"Proton Wallet news":["Aktualności Proton Wallet"],"Proton Wallet support":["Wsparcie dla Proton Wallet"]},"wallet_signup_2024:Pricing":{"Includes everything in Proton Unlimited and":["Zawiera wszystko, co Proton Unlimited oraz"],"Limited availability":["Ograniczona dostępność"],"The easiest way to securely own, send, and receive Bitcoin":["Najprostszy sposób na bezpieczne przechowywanie, wysyłanie i odbieranie waluty Bitcoin"]},"wallet_signup_2024:ProductRange":{"Discover Proton Wallet":["Odkryj rozwiązanie Proton Wallet"],"Store and transact Bitcoin privately with an encrypted self-custody wallet.":["Bezpiecznie przechowuj i przesyłaj Bitcoiny dzięki szyfrowanemu portfelowi typu self-custody."]},"wallet_signup_2024:wallet bitcoin":{"Learn about Bitcoin, the Internet's value network.":["Dowiedz się więcej o internetowym systemie gotówkowym Bitcoin."]},"wallet_signup_2024:wallet overview":{"Ensure you're always in control of your Bitcoin.":["Miej pełny nadzór nad swoimi Bitcoinami."]},"wallet_signup_2024:wallet security":{"The encrypted, open-source wallet that puts you in control.":["Szyfrowany portfel o otwartym kodzie źródłowym, który daje Ci pełną kontrolę."]}}},"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(nowe okno) 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(nowe okno) 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(nowe okno) 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(nowe okno). 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(nowe okno) 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.