ZeroEcho

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.

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🧭 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.