CipherBrick Pro

Clifton Cazes

About this app

CipherBrick Pro is a privacy-focused encryption tool that converts messages and text into secure encrypted strings using AES-256-GCM, industry-standard encryption, running entirely on your device. No accounts. No servers. No internet required.

HOW IT WORKS
Type or paste your message, enter a shared encryption key, and encrypt. Share the encrypted output through any channel: email, SMS, or chat. Only someone with the matching key can decrypt it.

FEATURES
• AES-256-GCM encryption with user-supplied or randomly generated keys
• Fully offline - no internet required after first launch
• Key Exchange Wizard - securely establish a shared encryption key with another person using a text string; the sender's public key is embedded automatically, with no separate sharing step required
• Audio transmission - the encrypted string is converted to audio tones and received by another device; useful for air-gapped and offline scenarios with no network or camera access
• Hardware key and passkey support (HKPM) - bind encryption to a FIDO2 security key such as a YubiKey for hardware-level protection (Chrome required)
• Simple mode - salt is auto-generated and embedded in the encrypted output; only a key is needed for decryption
• Session timer - automatically clears keys and sensitive data after inactivity
• No accounts, no telemetry, no ads, no cloud sync
• Available in 9 languages: English, Spanish, French, German, Italian, Portuguese, Russian, Japanese, Chinese (Simplified)
• Open source and fully auditable

WHO IS IT FOR
Privacy-conscious individuals, business professionals, security researchers, and anyone who wants to keep sensitive communications private without relying on third-party servers or cloud services.

CipherBrick Pro works across platforms - Android, iOS (Safari), and any modern desktop browser - so both parties can communicate regardless of their device.

What’s new

Initial public release of CipherBrick Pro. Offline AES-256-GCM encryption, QR/audio key exchange, and Hardware Key Private Message (HKPM) mode using WebAuthn PRF.