End-to-End Encryption (E2EE)
A system where data is encrypted on the sender's device and can only be decrypted by the intended recipient: no intermediary, including the service provider, can read it.
End-to-end encryption ensures that data is encrypted before it leaves the sender’s device and can only be decrypted by the intended recipient. The service provider, internet service provider, or any intermediary cannot access the plaintext data: they only see encrypted ciphertext.
E2EE is critical for messaging apps (Signal, WhatsApp), email services (ProtonMail), and password managers. In a password manager with E2EE, your credentials are encrypted with a key derived from your master password before being transmitted or stored. The server never has access to the unencrypted data.
For teams, E2EE means that even if the password manager’s servers are breached, the attackers obtain only encrypted blobs: useless without each user’s master password.
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