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README.md

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+# ZeroEcho
+
+<img src=ZeroEcho-logo.png width=20% align="right" />
+
+*A Modular Toolkit for Covert, Resilient, and Future-Proof Communication*
+
+**ZeroEcho** is a modular cryptographic toolkit designed to support secure, scriptable, and resilient data workflows — even in low-connectivity, offline, or constrained environments. Built with flexibility in mind, it enables developers, researchers, and advanced users to construct encryption pipelines using modern cryptographic algorithms and robust deployment models.
+
+Whether you're working on secure file storage, encrypted communication, or privacy-focused data exchange, ZeroEcho offers a toolkit to build reliable, modern cryptographic workflows — with a focus on portability, future-proofing, and offline survivability.
+
+**Key Features**
+
+- Post-Quantum Cryptography (PQC)
+    - Supports NIST-standardized algorithms like **ML-KEM (Kyber)**
+    - Modular structure allows easy integration of additional post-quantum providers
+    - Designed to protect against future quantum-based attacks
+
+- Multi-Recipient Encryption (KEM)
+    - Encrypt a single payload for multiple recipients, each with their own key
+    - No shared secrets or central authority required
+    - Optional decoy data streams to enhance confidentiality and recipient privacy
+
+- AES Encryption Pipeline
+    - Configurable AES modes: **GCM**, **CBC**, or **CTR**
+    - Key sizes: **AES-128**, **AES-192**, **AES-256**
+    - Fluent Java builder API for fine-grained parameter control
+
+- Offline / Air-Gapped Operation ("Cave Model")
+    - Generate encrypted payloads entirely offline
+    - Transfer via physical media (USB, SD card, etc.)
+    - Final upload or delivery can occur on separate, unconnected systems
+
+- Deployment Script Generator
+    - Automatically builds upload scripts for encrypted payloads
+    - Supports staging to public endpoints (e.g., cloud drives, pastebins, file hosts)
+    - Useful for creating asynchronous or indirect delivery workflows
+
+- Steganographic Embedding
+    - Optionally embed ciphertext into common media formats: images, audio, video
+    - Enables discreet transport of encrypted data over everyday channels
+
+- Additional Authenticated Data (AAD)
+    - Supports AAD in AES-GCM for binding unencrypted metadata
+    - Ensures integrity of file context without exposing its contents
+
+- CLI Tools & Keystore Management
+
+**ZeroEcho is ideal for:**
+
+- Building secure backup and archive workflows  
+- Sending encrypted messages across public platforms  
+- Creating educational or research-grade cryptographic tools  
+- Learning applied cryptography and encryption systems design  
+- Exploring secure data transport in offline or limited-access environments
+
+No deep programming experience is required to get started. Most features are available through intuitive CLI utilities and well-documented examples.
+
+---
+
+**🧭 Responsible Use Notice:** ZeroEcho is intended for lawful and ethical use only.
+It is designed to support privacy, secure communication, academic research, and freedom of expression. The author does **not condone or support** the use of this software for any illegal or malicious activities, including but not limited to data theft, unauthorized surveillance evasion, or digital espionage.
+
+Users are responsible for complying with all applicable laws and regulations in their jurisdiction. This is a tool for empowerment, not exploitation.