Update README.md

README.md

@@ -7,4 +7,30 @@ sdk: static
 pinned: false
 ---
 
-Check out the configuration reference at https://huggingface.co/docs/hub/spaces-config-reference
+# Secure KeyLock Decoder API
+
+This is a server-side API plugin running in a Docker container on Hugging Face Spaces. It provides a secure endpoint to decrypt messages from images created with the KeyLock application.
+
+## How It Works
+
+1.  **Encryption**: A user encrypts a secret message (e.g., credentials) into a PNG image using this plugin's **Public Key**.
+2.  **API Call**: The user's application sends this PNG file to this Space's `/api/decode` endpoint.
+3.  **Secure Decryption**: This server uses its corresponding **Private Key**, stored securely as a Hugging Face Secret, to decrypt the data from the image.
+4.  **Response**: The server returns the decrypted data as a JSON object.
+
+---
+
+### Plugin's Public Key
+
+Provide this public key to users who need to encrypt data for this service.
+
+```pem
+-----BEGIN PUBLIC KEY-----
+MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAy2sWjB1iQ3vK03U7e/9E
+O6J1K/s0tBq4Pz8F3r9/i8s7t9R1p8Z4Y6h4f4O7w9p9Z0c8t7m4J1e9g7K9m6f3
+R1k3y7v1w0l7z6s5v2l8l4t9v8z7y6t5k2x1c9v7z3k1y9w8r5t3s1v9a8d7g6f5
+e4d3c2b1a9f8e7d6c5b4a3f2e1d0c9b8a7f6e5d4c3b2a1f0e9d8c7b6a5f4e3d2
+c1b0a9f8e7d6c5b4a3f2e1d0c9b8a7f6e5d4c3b2a1f0e9d8c7b6a5f4e3d2c1b0
+a9f8e7d6c5b4a3f2e1d0c9b8a7f6e5d4c3b2a1f0e9d8c7b6a5f4e3d2c1b0a9f8
+e7d6
+-----END PUBLIC KEY-----