References & Further Reading

Protocols & Systems

Briar Project — How it works · GitLab
Secure Scuttlebutt Protocol Guide
Berty — Wesh Network · weshnet GitHub
p2panda · GitHub · Group Encryption post
Veilid · VeilidChat
BitChat · GitHub
Cwtch — Privacy-preserving messaging
Cabal — P2P local-first chat
Reticulum Network Stack
Meshtastic — LoRa Mesh
Offline Protocol Mesh SDK
SimpleX Chat · GitHub · Trail of Bits Audit (2022)
SimpleX Protocol Specification — queue-based messaging design
Session · oxen-io GitHub · Quarkslab Audit (2021)
Matrix Specification · GitHub
DeltaChat · GitHub · SecureJoin Protocol
Nostr Protocol NIPs · nostr.com
Tox Protocol · GitHub
GrapheneOS · CalyxOS — reference deployment platforms

Encryption

Signal Protocol — Double Ratchet Specification
Signal Protocol — X3DH Specification
Signal — Post-Quantum Ratchets (SPQR)
RFC 9420 — Messaging Layer Security (MLS)
libsignal (Signal app)
@privacyresearch/libsignal-protocol-typescript
VeraCrypt — cross-platform disk encryption with plausible deniability
Shufflecake — Linux plausible deniability (up to 15 hidden filesystems)
Cryptomator — file-by-file cloud encryption · Cure53 Audit (2021)
Picocrypt — minimal XChaCha20-Poly1305 file encryption
SQLCipher — AES-256 encrypted SQLite for mobile apps

Proximity Networking

Android APIs

Apple APIs

Bluetooth Specifications

Security Research

Privacy-Preserving Protocols

Market & Ecosystem

React Native Libraries

Regulatory

Local File Transfer (UX References)

LocalSend · GitHub — open-source AirDrop alternative (UDP multicast + HTTPS)
PairDrop · GitHub — browser-based WebRTC proximity transfer
Magic Wormhole · GitHub — PAKE-based secure transfer (SPAKE2)
OnionShare · GitHub — Tor-based anonymous file sharing
croc — encrypted P2P transfer with PAKE key agreement

Privacy Tools Curated Lists

pluja/awesome-privacy — curated privacy-respecting service alternatives (~18K stars)
Lissy93/awesome-privacy — privacy & security software directory (~9K stars)
privacytools.io — recommended tools with audit criteria

AI & Local Inference

Inference Runtimes

llama.cpp — CPU/GPU inference for quantized LLMs (GGUF format)
Ollama — Model management + OpenAI-compatible REST API wrapping llama.cpp
LocalAI · GitHub — unified OpenAI-compatible API for text, speech, and image
Jan · GitHub — desktop GUI for local LLM management and testing
llamafile (Mozilla) — Single-file LLM executables
whisper.cpp — C++ port of OpenAI Whisper for speech-to-text
Moonshine ASR — edge-optimized ASR, faster than Whisper on ARM CPUs
Piper TTS — fast local neural text-to-speech for ARM/Pi
CTranslate2 — Fast CPU/GPU inference for transformer models (used for NLLB-200)

On-Device Mobile Inference

MediaPipe LLM Inference (Google)
MLX (Apple) — Array framework for Apple Silicon (macOS/iOS)
ExecuTorch (Meta/PyTorch) — On-device inference for Android + iOS
TensorFlow Lite / LiteRT

Models

Gemma 3 (Google) — 1B–27B multilingual models
Phi-3 Mini (Microsoft) — 3.8B reasoning-focused small model
Qwen2.5 (Alibaba) — Strong multilingual 0.5B–72B series
Llama 3.2 (Meta) — 1B/3B edge-optimized models
NLLB-200 (Meta) — 200-language translation model
nomic-embed-text — Efficient text embedding model for semantic search

Edge Hardware

Raspberry Pi 5
Hailo AI HAT+ for Raspberry Pi — 26 TOPS NPU
Orange Pi 5 (RK3588) — 6 TOPS NPU
Jetson Orin Nano (NVIDIA) — 40 TOPS, 7–15W

LoRa Radio Mesh

Firmware & Software

Meshtastic — open-source LoRa mesh firmware and apps (GPL-3.0)
Meshtastic firmware (GitHub) — ESP32 and nRF52840 firmware
Meshtastic Python API — Python library for serial/TCP/BLE control
Reticulum Network Stack — cryptographic mesh networking over LoRa and other transports
RNode firmware (GitHub) — open LoRa node firmware used by Reticulum
LXMF — Lightweight Extensible Message Format — delay-tolerant message format on top of Reticulum
RadioLib (GitHub) — Arduino library for SX1262/SX1276 LoRa modules (custom firmware path)
Disaster Radio (GitHub) — paused ESP32 + LoRa + BLE Android bridge project (GPL-3.0)

Hardware

Heltec WiFi LoRa 32 V3 — ESP32-S3 + SX1262, ~$19, primary development board
LilyGO T-Echo — nRF52840 + SX1262 + e-paper + 850 mAh battery, ~$45
RAK WisBlock Meshtastic Starter Kit — modular nRF52840 + SX1262 platform

Specifications & Standards

Semtech — Introduction to LoRa — modulation fundamentals and link budget
ETSI EN 300 220-2 V3.3.1 — EU ISM 868 MHz band duty-cycle regulations (1% and 10% sub-bands)
LoRa Alliance — LoRaWAN Specification v1.0.4 — LoRaWAN MAC layer (not used in Meshtastic, but relevant background)

Range & Performance

Meshtastic range tests — community-contributed real-world range measurements by terrain type
Meshtastic mesh algorithm documentation — flood routing, hop limits, and scalability ceiling

Anonymity Coverage Across Prototypes

Internal cross-references (this page synthesises across the prototype specs and design pages; it has no external primary sources beyond those already listed under Encryption, Proximity Networking, and LoRa Radio Mesh):

Anonymity Lifecycle — four-layer taxonomy (L1 Identity, L2 Network, L3 Social, L4 Temporal) that the coverage matrix is built on
Threat Model — adversary profiles and per-layer residual risks
Threat Composition — cross-layer attack analysis; relay metadata gap (Gap 4) and audience field leak
Key Revocation & Recovery — revocation window stresses all four layers simultaneously
Spec: Tor Chat — P1; Double Ratchet (L4) via libsignal-android
Spec: BLE Messenger — P2; offline BLE (L2), static key limitation (L4)
Spec: Proximity Key Exchange — P3; unlinkable BLE beacon (L3)
Spec: Encrypted Feed — P4; hash chain and tombstone (L4 partial)
Spec: WiFi Relay — P5; relay metadata finding (L3 partial)
Spec: BLE Dead Drop — P6; recipient hash routing (L3 partial)
Spec: LoRa Radio Mesh — P7; Meshtastic node ID leak (L1/L3 partial)

Academic

Amigo: Secure Group Mesh Messaging (ACM SIGSAC 2025) — City College NY, Harvard, Johns Hopkins
Rumble: Decentralized delay-tolerant microblogging