all-in-one privacy solution":["Proton Unlimited tam kapsamlı bir gizlilik ve güvenlik çözümüdür"],"Black Friday":["Muhteşem Cuma"],"No ads. Privacy by default.":["Reklamsız. Privacy by default."],"People before profits":["İnsanlar paradan önce gelir"],"Security through transparency":["Şeffaflık ile güvenlik"],"The best Proton Mail ${ BLACK_FRIDAY } deals":["En iyi Proton Mail ${ BLACK_FRIDAY } fırsatları"],"The world’s only community- supported email service":["Dünyanın tek topluluk tarafından desteklenen e-posta hizmeti"]},"specialoffer:limited":{"${ hours } hour":["${ hours } saat","${ hours } saat"],"${ hoursLeft }, ${ minutesLeft } and ${ secondsLeft } left":["${ hoursLeft } - ${ minutesLeft } - ${ secondsLeft } kaldı"],"${ minutes } minute":["${ minutes } dakika","${ minutes } dakika"],"${ seconds } second":["${ seconds } saniye","${ seconds } saniye"],"Limited time offer":["Sınırlı süreli teklif"]},"specialoffer:listitem":{"Create multiple addresses":["Birden adres oluşturun"],"Hide-my-email aliases":["Hide-my-email takma adları (e-posta adresi)"],"Quickly unsubscribe from newsletters":["Bülten aboneliğinden hızlı ayrılma"],"Use your own domain name":["Kendi etki alanınızı kullanın"]},"specialoffer:logos":{"As featured in":["Belirtildiği gibi"]},"specialoffer:metadescription":{"Get an encrypted email that protects your privacy":["Gizliliğinizi koruyan bir şifreli e-posta edinin"]},"specialoffer:metatitle":{"Proton Mail Black Friday Sale - Up to 40% off":["Proton Mail Muhteşem Cuma İndirimleri - %40'a varan indirimler"]},"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.":["Bu Muhteşem Cuma'da Proton Mail aboneliklerinde %40'a varan indirimlerden faydalanın. Uçtan uca şifrelenmiş e-posta tarifelerimiz için muhteşem fırsatlardan yararlanın."]},"specialoffer:newmetatitle":{"Proton Mail Black Friday sale | Up to 40% off secure email":["Proton Mail Muhteşem Cuma İndirimleri - Güvenli e-postada %40'a varan indirimler"]},"specialoffer:note":{"* Billed at ${ TOTAL_SUM } for the first year":["* İlk yıl için ${ TOTAL_SUM } üzerinden faturalandırılır"],"*Billed at ${ TOTAL_SUM } for the first 2 years":["*ilk 2 yıl için ${ TOTAL_SUM } üzerinden faturalandırılır"],"30-day money-back guarantee":["30 günlük para iade garantisi"],"Billed at ${ TOTAL_SUM } for the first 2 years":["İlk 2 yıl için ${ TOTAL_SUM } üzerinden faturalandırılır"],"Billed at ${ TOTAL_SUM } for the first year":["İlk yıl için ${ TOTAL_SUM } üzerinden faturalandırılır"],"You save ${ SAVE_SUM }":["${ SAVE_SUM } tasarruf ediyorsunuz"]},"specialoffer:off":{"${ DISCOUNT } off":["${ DISCOUNT } indirim"],"${ PERCENT_OFF } off":["${ PERCENT_OFF } indirim"]},"specialoffer:testimonial":{"I love my ProtonMail":["ProtonMail'imi seviyorum"],"My favorite email service":["En sevdiğim e-posta hizmeti"],"Thanks Proton for keeping us all safe in the complicated internet universe.":["Hepimizi bu karışık internet evreninde güvende tuttuğun için teşekkürler Proton."],"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":["Ödediğinizin karşılığını alırsınız. Big Tech şirketleri söz konusu olduğunda, hiçbir şey ödememiyorsanız sizi kullanırlar. Gmail kullanmayı bıraktım ve @ProtonMail hizmetine geçtim"]},"specialoffer:time":{"Days":["Gün"],"Hours":["Saat"],"Min":["Dakika"]},"specialoffer:title":{"And much more":["Ve çok daha fazlası"],"Make your inbox yours":["Gelen kutunuzu kendize özel tutun"],"Safe from trackers":["İzleyicilerden güvende olun"],"Stay organized":["Düzenli kalın"],"Black Friday email deals":["Muhteşem Cuma e-posta fırsatları"],"Don’t just take our word for it":["Sırf bizden duymuş olmayın"],"Our story":["Öykümüz"],"Transfer your data from Google in one click":["Google'dan bilgilerinizi tek tıkla aktarın"]},"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.":["Yasaklı içeriklere erişin ve gizlice gezinin. ${ TOTAL_COUNTRIES } üzeri ülkede ${ TOTAL_SERVERS } üzerinde sunucu, 10 aygıta kadar bağlantı, dünya çapındaki yayın hizmetlerine erişim, kötü amaçlı yazılım ve reklam engelleyici, ve daha fazlasını içerir."],"Easily share your calendar with your family, friends or colleagues, and view external calendars.":["Takviminizi bir bağlantı aracılığıyla ailenizle, arkadaşlarınızla veya iş arkadaşlarınızla paylaşın ve başka takvimleri görüntüleyin."],"Includes support for 1 custom email domain, 10 email addresses, 10 hide-my-email aliases, calendar sharing, and more.":["1 özel e-posta etki alanı, 10 e-posta adresi, 10 hide-my-email takma adı, takvim paylaşma ve daha fazlası için destek içerir."],"Includes support for 3 custom email domains, 15 email addresses, unlimited hide-my-email aliases, calendar sharing, and more.":["3 özel e-posta etki alanı, 15 e-posta adresi, sınırsız hide-my-email takma adı, takvim paylaşma ve daha fazlası için destek içerir."],"Manage up to 25 calendars, mobile apps, secured with end-to-end encryption, 1-click calendar import from Google, and more.":["25'ye kadar takvim yönetin, mobil uygulamalar, uçtan uca şifreleme ile koruma, Google'dan tek tıkla aktarma ve daha fazlası."]},"Status Banner":{"At the moment we are experiencing issues with the Proton VPN service":["Şu anda Proton VPN hizmetiyle ilgili sorunlar yaşıyoruz"],"Learn more":["Ayrıntılı bilgi alın"]},"Status banner":{"Learn more":["Ayrıntılı bilgi alın"],"Please note that at the moment we are experiencing issues with the ${ issues[0] } service.":["Şu anda ${ issues[0] } hizmeti ile ilgili sorun yaşamaktayız, bilginize."],"We are experiencing issues with one or more services at the moment.":["Şu anda bir veya daha fazla hizmet ile ilgili sorun yaşamaktayız."]},"suggestions":{"Suggestions":["Öneriler"]},"Support":{"Sub category":["Alt kategori","Alt kategori"]},"Support article":{"${ readingTime } min":["${ readingTime } dakikalık","${ readingTime } dakikalık"],"Category":["Kategori","Kategori"],"Didn’t find what you were looking for?":["Aradığınızı bulamadınız mı?"],"General contact":["Genel iletişim"],"Get help":["Yardım alın"],"Legal contact":["Hukuki iletişim"],"Media contact":["Medya iletişimi"],"Partnerships contact":["Ortaklık iletişimi"],"Reading":["Okuma süresi"]},"Support categories":{"Browse Proton product support":["Proton ürün desteğine göz atın"]},"Support category":{"There is no article in this category yet.":["Bu kategoride henüz bir makale yok."]},"Support troubleshooting":{"--- Select ---":["--- Seç ---"],"App version":["Uygulama sürümü"],"Browser":["Tarayıcı"],"Check if this helps":["Yardımcı olabilecek bu cevaba bir göz atın"],"Choose a category for your question":["Sorunuz için bir kategori seçin"],"Choose a product":["Bir ürün seçin"],"Did this solve your issue ?":["Bu, sorununuzu çözdü mü?"],"Faster assistance is just a few clicks away — please make your selections":["Daha hızlı yardım birkaç tık uzağınızda, lütfen tercihlerinizi yapın"],"No, contact support":["Hayır, destekle iletişime geçin"],"Proton account":["Proton hesabı"],"Proton Bridge":["Proton Bridge"],"Proton Calendar":["Proton Calendar"],"Proton Drive":["Proton Drive"],"Proton for Business":["Proton for Business"],"Proton Mail":["Proton Mail"],"Proton Pass":["Proton Pass"],"Proton VPN":["Proton VPN"],"Thank you for your feedback":["Geri bildiriminiz için teşekkürler"],"Troubleshooting":["Sorun giderme"],"What can we help with ?":["Ne konuda yardımcı olabiliriz?"],"Yes":["Evet"]},"support_modal_search_query":{"Search query":["Sorgu ara"]},"support_search_button":{"Search":["Ara"]},"support_search_i_am_looking_for":{"I'm looking for":["Şunu arıyorum: -"]},"SupportForm":{"For a faster resolution, please report the issue from the Bridge app: Help > Report a problem.":["Daha hızlı bir çözüm için, lütfen sorunu Bridge uygulamasının Yardım > Bir sorun bildir kısmından bildiririn."],"Information":["Bilgi"]},"SupportForm:option":{"Account Security":["Hesap Güvenliği"],"Contacts":["Kişiler"],"Custom email domain":["Özel e-posta etki alanı"],"Email delivery and Spam":["E-posta iletimi ve istenmeyen e-postalar"],"Encryption":["Şifreleme"],"Login and password":["Oturum ve şifre"],"Merge aliases and accounts":["Takma adları (e-posta adresi) ve hesapları birleştir"],"Migrate to Proton":["Proton üzerine aktarım"],"Notifications":["Bildirimler"],"Other":["Diğer"],"Plans and billing":["Tarifeler ve faturalandırma"],"Proton for Business":["Proton for Business"],"Sign up":["Hesap açma"],"Storage":["Depolama"],"Users, addresses, and identities":["Kullanıcılar, adresler ve kimlikler"]},"SupportForm:optionIntro":{"Select a topic":["Bir konu seç"]},"swiss_baseed_feature":{"Swiss based":["İsviçre merkezli"]},"Testimonial":{"Awards":["Ödüller"],"Customers":["Müşteriler"],"Featured":["Öne Çıkanlar"],"Go to testimonial source":["Müşteri görüşünün kaynağına git"],"Reviews":["İncelemeler"],"Videos":["Videolar"]},"Text":{"Find the plan that's right for you":["Size uygun tarifeyi bulun"],"If you need help, check out our ${ supportLink }.":["Yardıma ihtiyacınız varsa ${ supportLink } ziyaret edebilirsiniz."],"The page you’re looking for might have been removed, or it could be an\nold link.":["Aradığınız sayfa kaldırılmış veya eski bir\nbağlantı olabilir."]},"Title":{"On this page":["Bu sayfada"],"Related articles":["İlgili makaleler"],"Share ${ thisPage }":["${ thisPage } paylaşın"],"Thank you!":["Teşekkürler!"],"this page":["Bu sayfayı"]},"Tooltip":{"More information":["Daha fazla bilgi"]},"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.":["20'ye varan özel ve paylaşılabilir şifrelenmiş takvim oluşturun. Üstelik arkadaşlarınızdan, ailenizden, iş arkadaşlarınızdan ve kuruluşlardan 5'e kadar takvim ekleyin."]},"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.":["Yasaklı içeriklere erişin ve gizlice gezinin. ${ TOTAL_COUNTRIES } üzeri ülkede ${ TOTAL_SERVERS } üzerinde sunucu, en yüksek VPN hızını, ${ TOTAL_VPN_CONNECTIONS } VPN bağlantısı, dünya çapındaki yayın hizmetlerini, kötü amaçlı yazılım ve reklam engelleyici, ve daha fazlasını içerir."],"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.":["Yasaklı içeriklere erişin ve gizlice gezinin. ${ TOTAL_COUNTRIES } üzeri ülkede ${ TOTAL_SERVERS } üzerinde sunucu, en yüksek VPN hızını, 10 VPN bağlantısı, dünya çapındaki yayın hizmetlerini, kötü amaçlı yazılım ve reklam engelleyici, ve daha fazlasını içerir."]},"version_history_label":{"Version history":["Sürüm geçmişi"]},"version_history_tooltip":{"Store up to ${ versionHistoryNumber } versions of each file for up to ${ years } years":["Her dosyanın ${ versionHistoryNumber } sürümünü ${ years } yıla kadar tutun"]},"vpn_features_link":{"View VPN plans":["VPN tarifelerini görüntüle"]},"vpn_features_useCase":{"Access blocked content and browse privately":["Yasaklı içeriklere erişin ve gizlice gezinin"]}}},"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
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Ciphertext is unreadable, encrypted data that can only be read if you know the key. Learn all about ciphertext and how it ensures your data privacy by securing computers and online communications, including encrypted email.
When Julius Caesar wanted to send a secret message to the Roman army, he scrambled the letters into ciphertext – garbled text that could only be deciphered with a secret key. Only the troops that knew the key could read it.
Two thousand years later, computer-generated ciphertext keeps your confidential data private on your devices and online. We explain what ciphertext is and how it’s used to secure online communications, including encrypted email.
In cryptography, ciphertext, also known as encrypted text, is the unreadable text that results when you encrypt text.
In contrast, plaintext is ordinary, readable text that is not encrypted.
When you encrypt a message using an encryption algorithm known as a cipher, your original text (plaintext) is transformed into a series of random numbers and letters (ciphertext) that can’t be read.
When you decrypt the message, this ciphertext is converted back into plaintext — your original, readable message.
Ciphertext example
Here is some simple ciphertext encrypted using the Caesar cipher, Julius Caesar’s original method, which uses letters only:
JV PBZOBQ QBUQ
To encrypt the original message into the ciphertext above, each letter of the text was shifted three letters back in the alphabet.
“A” shifts three letters back and becomes “X”
“B” becomes “Y”
“C” becomes “Z”
and so on…
So to decrypt the message into readable plaintext, you must shift each letter three letters forward in the alphabet.
Ciphertext
J
V
P
B
Z
O
B
Q
Q
B
U
Q
Plaintext (3 letters forward)
M
Y
S
E
C
R
E
T
T
E
X
T
Deciphering ciphertext into plaintext
So “JV PBZOBQ QBUQ” reads “MY SECRET TEXT”.
In this case, the key to the cipher is 3: you shift each letter three places back or forward in the alphabet to encrypt or decrypt it. This is known as a substitution cipher.
Types of ciphers
Historically, encryption was done by hand, typically using pen and paper. Before the advent of machines, ciphertext was usually created by simply replacing letters (substitution cipher) or re-ordering them (transposition cipher).
These simple ciphers are no longer used as methods of encryption on their own because they’re quite easy to decipher. Today, computer-implemented ciphers are much more secure with long, complex keys consisting of numbers and letters. The longer the key, the harder the cipher is to crack.
Modern ciphers can be divided into two broad categories depending on how they handle keys:
1. Asymmetric-key ciphers
Also known as public-key ciphers, asymmetric-key ciphers use pairs of mathematically related keys: a public key and a private key.
You encrypt a message to create ciphertext with a person’s public key, which is publicly available and anyone can use. But only that person can decrypt the message into plaintext using their corresponding private key, which they keep secret.
2. Symmetric-key ciphers
Also known as private-key ciphers, symmetric-key ciphers use a single key to encrypt and decrypt the message.
Key type
Key(s)
Examples
Asymmetric-key cipher
Public key Private key
RSA, ECC
Symmetric-key cipher
Single key
AES, ChaCha20, Salsa20
Types of ciphers
Uses of ciphertext
From your smartphone and laptop to websites, secure email, cloud storage, and ATMs, ciphertext is used wherever encryption is used to protect the confidentiality of data on computers and computer networks.
For example, most websites use HTTPS(new window) to secure communications, which relies on the TLS encryption protocol. Connect to your bank or an online store, and TLS converts the data you exchange into ciphertext. TLS uses a combination of asymmetric-key and symmetric-key ciphers to secure your connection.
Secure email providers, like Proton Mail, also use encryption to scramble your messages into ciphertext. For Proton Mail, we use AES-256 and ECC or RSA ciphers to implement end-to-end encryption, so only you can read your emails.
But with most other email providers that claim to be secure, you can’t guarantee your messages will remain encrypted all the time.
Email ciphertext
Most big email services, like Gmail and Outlook, encrypt emails in two ways. They use:
TLS encryption to secure emails in transit, turning them into ciphertext when they’re being sent from A to B (if the recipient’s server supports TLS)
Symmetric-key encryption, like AES, to encrypt emails stored on their servers
However, who can decrypt your emails remains beyond your control.
First, TLS secures your messages in transit, but once they arrive, their security depends on what encryption the receiving server uses. As Microsoft explains about Outlook(new window), “with TLS, the message might not stay encrypted after the message reaches the recipient’s email provider”.
Second, most email providers retain the encryption keys to your messages. So they can access your data and hand it over to third parties, like advertisers, data brokers, or governments.
The only way to be sure an email you send will remain as ciphertext until your recipient opens it is to use end-to-end encrypted email, like Proton Mail. With end-to-end encryption, your emails are encrypted on your device before being uploaded to our servers and can only be decrypted and read by the intended recipient.
For example, when Bob writes to Alice, his message is converted into ciphertext using Alice’s public key. Only Alice can decrypt the message into plaintext by using her private key.
We’ve designed Proton Mail so that you remain in control of your encryption keys at all times, so only you can access your emails. With Proton Mail you get:
End-to-end encryption: Any message you send to someone on Proton Mail is end-to-end encrypted by default. No one but you and your intended recipient(s) can read them.
Password-protected Emails: Easily send an end-to-end encrypted email to anyone who isn’t on Proton Mail without any technical knowledge.
Zero-access encryption: No one can access any of your stored emails without your authorization, not even Proton.
At Proton, our goal is to keep everyone private and secure online, so join us. With Proton Mail, you decide who can decipher your encrypted emails, attachments, contacts, and calendar.
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