StopChatControl

🔐 SecureChats KEYBOARD - Military-Grade Encryption in Any Messenger

SecureChats KEYBOARD is an Android keyboard that brings real end-to-end encryption (E2EE) using Signal Protocol and Kyber post-quantum encryption, all without relying on servers. Communicate safely and independently, regardless of legal changes or whether your favorite messenger supports E2EE.

⚖️ WHY SECURECHATS KEYBOARD?

Laws like the proposed EU chat control threaten privacy in E2EE messengers (WhatsApp, Signal, etc.). While robust solutions like PGP exist, they can be cumbersome. SecureChats KEYBOARD simplifies secure communication by integrating the Signal Protocol (X3DH and Double Ratchet algorithms) directly into an Android keyboard—now enhanced with Kyber post-quantum encryption for next-generation cryptographic security.

✨ KEY FEATURES:

💬 **Universal Encryption**
• Send & receive encrypted messages in ANY messenger
• Dedicated text field above keyboard for secure writing/reading
• Compatible with WhatsApp, Telegram, SMS, Signal, email, Discord, etc.
• Use clipboard to decode incoming messages

🎭 **Fairytale Mode (Total Stealth)**
• Hide your encrypted messages inside innocent decoy text
• Nobody will suspect you're sending encrypted information
• Alternative: Raw mode for direct JSON output
• You decide your discretion level

🔑 **Independent Management**
• Manage your own contact list directly within the keyboard
• Secure pairing via QR codes
• Verify contacts via cryptographic fingerprint check
• Complete log of sent and received messages

🛡️ **Military-Grade Security**
• X25519 with SHA-512 for X3DH Key Agreement
• Double Ratchet for message exchange with AES-256-CBC
• SHA-256 for chain calculations
• Kyber for post-quantum encryption resistant to quantum computers
• Perfect Forward Secrecy (PFS)

🎨 **Customizable Experience**
• Dark & Light themes
• Q&A view for quick guidance
• Intuitive and easy-to-use interface
• No complicated learning curve

🌍 **Absolute Privacy**
• No servers, no accounts, no registration
• Everything stored locally on your device
• No internet connection required
• No ads or trackers
• Open-source and auditable

⚠️ **LIMITATIONS (Full Transparency)**
• One-to-one chats fully supported. In group chats, only the intended recipient can decrypt
• Some messengers (like Telegram) paste text as HTML, disrupting Fairytale mode. Raw mode remains reliable
• Certain messengers (like Threema) limit message size (~3500 bytes), so only 500 characters are permitted in both modes
• For encrypted communication, both users need SecureChats KEYBOARD and must have exchanged QR keys

🎯 **PERFECT FOR:**
• Activists and journalists
• Professionals with confidential information
• Users concerned about mass surveillance
• Anyone who values their digital freedom
• Preparation for future quantum threats

🔒 **VERIFIABLE SECURITY:**
Uses the same proven cryptographic protocol as Signal, trusted by millions. Now with Kyber for post-quantum protection. Your privacy is mathematically guaranteed.

🆓 **100% FREE, UNLIMITED:**
No subscriptions, no in-app purchases, no tricks. Privacy accessible to everyone.

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🔐 Experience truly independent and robust encryption in any app. Secure your conversations with SecureChats KEYBOARD.

·#STOPCHATCONTROL

Recent changes:
Updated last version of libsignal and fix 16kbpage