How Blanksheet Encryption Works
True end-to-end privacy. Zero-knowledge architecture.
At Blanksheet, we've built true zero-knowledge encryption into the core of the product — your journal is completely private, even from us. Here's exactly how our revolutionary security works.
What's Encrypted
Every journal entry, reflection, and AI-generated insight is encrypted using AES-256-GCM, a military-grade standard trusted by banks and governments.
What you write is stored as ciphertext — completely unreadable without your personal key. Think of it like writing in a secret code that only you know how to decode.
Who Can Read It?
Only you. Period.
Our zero-knowledge architecture means we literally cannot access your journal, even if we wanted to. Here's how your data flows through our system:
The Process
- 1Ephemeral encryption keys are generated in your browser. Keys exist only in your device's memory and are never transmitted to our servers.
- 2All encryption happens on your device. Entries are encrypted in your browser before any data leaves your device.
- 3For AI insights: Your browser decrypts entries locally, sends them securely to our AI engine via encrypted connection, and immediately re-encrypts the insights on your device.
- 4Keys are never stored or logged. Our servers never receive, store, or have access to your encryption keys.
- 5Zero server-side decryption. We only ever see and store encrypted ciphertext — never your actual thoughts.
True End-to-End Encryption
Unlike other apps that claim privacy but still have server access, Blanksheet offers genuine end-to-end encryption with these guarantees:
Zero-Knowledge Architecture
- • Your encryption keys never leave your device
- • Our servers cannot decrypt your data under any circumstances
- • Even if our systems were compromised, your journal remains secure
Ephemeral Key Management
- • Fresh encryption keys generated per session
- • Keys exist only in browser memory — never persisted
- • No key transmission, logging, or server-side storage
Client-Side Processing
- • All encryption/decryption happens on your device
- • AI insights processed with ephemeral keys that disappear after use
- • No plaintext data ever stored on our servers
What This Means for You
We cannot read your journal entries, even if legally compelled
You control your data completely — we're just encrypted storage
Keys generated fresh each session provide maximum protection
Meets the highest standards for data privacy and protection
Our team, developers, and support staff cannot access your content
Your encrypted data can never be used to train our models
The Bottom Line
Your journal is genuinely private. We've built Blanksheet so that protecting your privacy isn't a promise we make — it's a technical impossibility for us to break.
This is real end-to-end encryption. Your thoughts, your key, your privacy.
Transform Your Thoughts into Meaningful Insights
Get started free and experience a mindful, AI-driven journaling experience that is truly private