Your Notes.
Encrypted.
Private. Yours.
Cipher Scribe is a military-grade encrypted notes app that works entirely offline. RSA-2048 key wrapping, AES-256-GCM content encryption, biometric lock, and a rich text editor — all without ever touching the internet.
Everything You Need. Nothing You Don't.
A secure notes app that respects your privacy and gets out of your way.
End-to-End Encrypted
Every note is encrypted with AES-256-GCM before it touches storage. Keys are wrapped with RSA-2048 and stored in your device's hardware security module.
Fully Offline
Cipher Scribe never connects to the internet. No cloud sync, no telemetry, no analytics. Your notes physically cannot leave your device.
Biometric Lock
Protect sensitive notes with Face ID or fingerprint. Private notes require biometric authentication every time you open them.
Rich Text Editor
A Notion-like writing experience with bold, italic, headings, bullet lists, checklists, code blocks, blockquotes, links, and more.
Encrypted Backups
Export password-protected backups encrypted with PBKDF2 + AES-256-GCM (100,000 iterations). Restore anytime on any device.
Hardware-Backed Keys
Your RSA-2048 key pair is generated on first launch and stored in Android Keystore or iOS Keychain — never in plain text, never extractable.
Built on Real Cryptography
Not marketing buzzwords. Actual algorithms you can verify.
Your Note
AES-256-GCM Encryption
Random 256-bit key + 96-bit nonce
RSA-2048 Key Wrapping
AES key encrypted with your public key
Encrypted Storage
SQLite database on device
Simple to Use. Impossible to Crack.
Write Your Note
Use the rich text editor to write freely. Format with headings, lists, code blocks — just like Notion.
Automatic Encryption
When you save, Cipher Scribe generates a random AES-256 key, encrypts your note, wraps the key with RSA-2048, and stores everything securely.
Decrypt When You Need It
Tap to decrypt. For private notes, authenticate with your fingerprint or face. Your data is only readable by you, on your device.
Our Privacy Promise
- We collect zero data. No accounts, no emails, no tracking.
- The app requires zero internet permissions. Check the manifest yourself.
- Your encryption keys are generated on-device and stored in hardware security modules.
- We cannot read your notes. Nobody can. Not even with a court order — we don't have your keys.
- The encryption is standard, auditable, and open to scrutiny: RSA-2048 + AES-256-GCM.
- Backups are encrypted with your password using PBKDF2 (100K iterations) + AES-256-GCM.
Ready to Take Back Your Privacy?
Download Cipher Scribe and start writing secure notes in seconds.
Free. No ads. No in-app purchases. No account required.