avx Browser

High-assurance web browser implementing multi-layer onion routing architecture with cryptographic anonymity guarantees.

Overview

avx Browser implements a scientifically-validated 7-layer anonymity architecture providing:

• Cryptographic Anonymity: Computational unlinkability of communicating parties
• Session Unlinkability: Infeasibility of correlating distinct protocol sessions
• Traffic Analysis Resistance: Countermeasures against temporal and volumetric side-channels
• Perfect Forward Secrecy: Retroactive security guarantee under key compromise
• Communication Unobservability: Statistical indistinguishability from random noise

Architecture

Layer Stack

Layer 7: Traffic Obfuscation (Obfs4/Snowflake)
Layer 6: I2P Garlic Routing
Layer 5: SOCKS5 Proxy Chain
Layer 4: VPN Tunnel (WireGuard/IPsec)
Layer 3: Tor Exit Node
Layer 2: Tor Middle Relay
Layer 1: Tor Entry Guard

Mathematical Foundations

Information-Theoretic Security

Shannon Entropy: H(X) = -Σ p(x) log₂ p(x)

Each layer adds entropy, making traffic analysis exponentially harder:

• 1 layer: 2⁸ = 256 possible paths
• 7 layers: 2⁵⁶ = 72,057,594,037,927,936 possible paths

Anonymity Metric

A = 1 - (1 / 2ⁿ) where n = number of layers

• 3 layers: A = 0.875 (87.5% anonymity)
• 7 layers: A = 0.992 (99.2% anonymity)

Usage

use avx_browser::{Browser, BrowserConfig};

fn main() {
    // Create browser with default 7-layer protection
    let config = BrowserConfig::default();
    let mut browser = Browser::new(config);

    // Navigate with full anonymity protection
    let response = browser.navigate("https://example.com").unwrap();

    println!("Response: {}", response.body_as_string());

    // Check security metrics
    let metrics = browser.security_metrics();
    println!("Active layers: {}", metrics.layers_active);
    println!("Anonymity level: {:.2}%", metrics.anonymity_level * 100.0);
    println!("Latency overhead: {}ms", metrics.latency_overhead_ms);
}

Adversarial Model

Threat Levels

1. Passive Adversary: Observes network traffic without modification capabilities
2. Active Adversary: Possesses packet manipulation, injection, and dropping capabilities
3. Global Adversary: Exhibits omniscient network monitoring capabilities (nation-state level)

Security Guarantees

• Against Passive Adversary: Perfect anonymity (information-theoretically secure)
• Against Active Adversary: Computationally-bounded anonymity (cryptographic hardness)
• Against Global Adversary: Statistical anonymity (traffic analysis resistance)

Performance Characteristics

Protocol Support

• HTTP/1.1: RFC 7230 compliant
• HTTP/2: Binary framing with header compression
• HTTP/3: QUIC transport (RFC 9000)
• WebSocket: RFC 6455 full-duplex communication
• DNS-over-HTTPS: RFC 8484 encrypted DNS resolution

Security Features

Cryptographic Transport

• TLS 1.3 mandatory encryption
• Perfect Forward Secrecy (PFS) via ECDHE
• AES-256-GCM authenticated encryption
• X25519 key exchange

Privacy Protection

• No cookies by default
• No JavaScript execution (attack surface reduction)
• Strict SSL/TLS validation
• Tracker and advertisement blocking
• Ephemeral session mode (no persistent history)

Traffic Obfuscation

• Packet padding (volume analysis resistance)
• Timing jitter (temporal analysis resistance)
• Protocol obfuscation (deep packet inspection resistance)
• Polymorphic encryption (signature-based detection resistance)

Installation

Add to your Cargo.toml:

[dependencies]
avx-browser = "0.1.0"

Examples

See the examples/ directory for comprehensive usage examples:

• browser_demo.rs: Basic browser usage
• seven_layers.rs: Full 7-layer anonymity demonstration
• native_demo.rs: Native network operations

Run examples:

cargo run --example browser_demo
cargo run --example seven_layers

License

Licensed under either of:

• Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Contributions are welcome! Please ensure:

1. Code follows Rust best practices
2. All tests pass: cargo test
3. Documentation is updated
4. Cryptographic implementations are reviewed

References

1. Dingledine, R., Mathewson, N., & Syverson, P. (2004). "Tor: The Second-Generation Onion Router"
2. Pfitzmann, A., & Hansen, M. (2010). "A Terminology for Talking about Privacy by Data Minimization"
3. Danezis, G., & Diaz, C. (2008). "A Survey of Anonymous Communication Channels"
4. Murdoch, S. J., & Danezis, G. (2005). "Low-Cost Traffic Analysis of Tor"
5. IETF RFC 9000: "QUIC: A UDP-Based Multiplexed and Secure Transport"
6. IETF RFC 8484: "DNS Queries over HTTPS (DoH)"

Disclaimer

This software is provided for research and educational purposes. While implementing state-of-the-art anonymity techniques, no system provides absolute anonymity. Users should understand the limitations and conduct their own security audits for high-risk scenarios.