SendOtherSocials: Encryptor

Create your own end-to-end encryption - no servers, no sign-ups.
Turn text into emoji or Chinese-character sequences that look harmless - but can only be read with the right key.
Files (photos, documents, archives, and more) are encrypted locally on your device and can be safely sent anywhere.

✨ What the app can do:
✦ 3 text encryption modes:
• Chinese characters
• Emojis
• Cryptographic mode (Threefish-1024, Base91 output)
Transform any message into Chinese characters, emojis, or cryptotext. A simple phrase like “Hello!” turns into a sequence of characters that no one can read without the key.
✦ Local key storage - save your keys, switch between them instantly, no need to re-enter.
✦ Post-quantum key exchange - supports Kyber ML-KEM-512 and ML-KEM-768 for each contact; you can store multiple keys per contact, no limits.
✦ File encryption for any file type. Protect photos, documents, archives, and any other data. Even when sent via messengers or social networks, they stay fully secure.
✦ End-to-end in your hands: only you and the recipient know the key.
✦ 69+ UI languages - convenient worldwide.
✦ Built-in secure keyboard for safe, third-party-free input (Latin and Cyrillic).
✦ Your key = your imagination: any text, symbols, or favorite emojis.
✦ No accounts, no servers - everything works locally on your device.

🛡️ Security modes
● Deterministic - the same text always produces the same ciphertext. Useful for predictability and searching over encrypted data.
● Non-deterministic - the same input and key produce different ciphertexts each time. More randomness means higher resistance to analysis.

🔐 Key and data protection
● All keys and shared secrets are stored locally in an encrypted database (SQLCipher).
● The database passphrase is additionally protected via Android Keystore.
● User-entered keys are encrypted again (AES-GCM) before being stored and are bound to a specific contact and alias.
● Nothing is sent to external servers - you share public parts or shared secrets only through channels you choose.

🚀 In practice
➤ Send your friend a phrase encrypted as emojis - for everyone else it’s just a cute set of symbols, but for you two it’s a secret message.
➤ Agree on a key via Kyber and keep encrypting without typing keys manually.
➤ Encrypt a document and upload it to the cloud or send it in a messenger - even if it leaks, it can’t be opened without the key.

⚡ Why it’s convenient
✔ Original text disguise (emoji / Chinese characters) + a Threefish-1024 cryptographic layer.
✔ Post-quantum key exchange (Kyber ML-KEM-512 / 768) - future-proof security.
✔ Simple and fast: enter text or pick a file → encrypt → send.
✔ You control the key.

❗ Important
The app improves privacy and protects data when used correctly and when the key is stored safely. Files are encrypted using the Threefish algorithm (BouncyCastle implementation).
⚠️ Some apps or services may not display emoji- or Chinese-based ciphertext correctly. Before sending, check whether the recipient can see the characters.