End-to-End Encryption Explained
The messages you write in FinalNote are among the most private things you'll ever put into words. Here's exactly how we protect them — and why even we can't read them.
What Encryption Actually Means
Encryption transforms readable data into an unreadable scramble that can only be decoded with the correct key. End-to-end encryption (E2EE) means that data is encrypted on your device before it leaves, and can only be decrypted by the intended recipient. Nothing in the middle — including our servers — can read it.
Think of it like a physical letter placed inside a lockbox. You lock it, send it, and only the person with the right key can open it. Even the courier — FinalNote — never has access to the key.
How FinalNote Implements This
When you create a message in FinalNote, it is encrypted on your device using AES-256, one of the strongest encryption standards available. The encryption key is derived from your password and is never transmitted to our servers in a form we can use. We store only the encrypted ciphertext.
When your message is delivered to a recipient, they receive the encrypted message along with a separate, one-time decryption link. That link is generated at delivery time using your stored encryption parameters — we facilitate the handoff, but we never see the plaintext content.
Zero-Knowledge Architecture
FinalNote is built on a zero-knowledge architecture. This means the design of our system explicitly ensures that we cannot access your data, even if we wanted to, even if compelled by a legal order. What we can't see, we can't hand over.
This is not just a policy — it is a technical constraint built into the system from the ground up.
What This Means for You
Write freely. Say the things you've always meant to say. Your most personal words — instructions, confessions, love letters, financial information — are protected by the same technology used by defense agencies and privacy advocates worldwide. At FinalNote, your privacy isn't a feature. It's the foundation.
