Text Steganography

Hides an encrypted message inside text using invisible characters, masking it as an ordinary document.

🔐 Crypto core: Argon2id + AES-CTR + HMAC-SHA256 | dual-block container with fixed quanta | Encrypt-then-MAC
The longer the cover text, the more data it can hold. If there is not enough space, the tool will show exact values: needed / available.
Each byte of the compact-binary payload takes 4 zero-width characters. For reliable operation, use a long cover text.
⚙️ Show advanced options (Dual layer)
Upload the container file (.txt)
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