Every email is encrypted with its own unique key. This means that if a key is compromised it cannot be used to access your entire inbox.
All the content of your mailbox will be synchronized securely across all your devices. Every device has their own set of keys, so every email is encrypted multiple times, once per each device of the recipient(s).
All your emails and private keys are stored solely on your device. Once Criptext delivers an email there‘s no trace of it left in our servers whatsoever.
Criptext‘s unique encryption process is sophisticated, yet easy to understand.
The email is encrypted with Bob‘s public key.
Attachments are encrypted using an ephemeral AES key, which is safely stored inside the encrypted content of the email.
Criptext servers receive the email and send it to the recipients.
The email is decrypted using Bob‘s private key which is stored on his device alone.