Tor and Anonymity Systems

2.

Foundational Concepts of Anonymity Networks

2.1.

2.1.1.

Principles of Mix Networks

2.1.1.1.

Message Batching

2.1.1.2.

2.1.1.3.

Cryptographic Protection

2.1.2.

2.1.2.1.

Original Mix Design

2.1.2.2.

Message Shuffling

2.1.2.3.

Delayed Forwarding

2.1.2.4.

Cryptographic Layers

2.1.3.

Mix Network Topologies

2.1.3.1.

Cascade Networks

2.1.3.2.

Free-Route Networks

2.1.3.3.

Stratified Networks

2.1.4.

Batching Strategies

2.1.4.1.

Fixed-Size Batches

2.1.4.2.

2.1.4.3.

Threshold Batches

2.1.5.

2.1.5.1.

Cover Traffic Generation

2.1.5.2.

Traffic Padding

2.1.5.3.

Constant Rate Systems

2.2.

Latency Classifications

2.2.1.

High-Latency Systems

2.2.1.1.

Email-like Applications

2.2.1.2.

Store-and-Forward

2.2.1.3.

Strong Anonymity Guarantees

2.2.2.

Low-Latency Systems

2.2.2.1.

Real-time Communication

2.2.2.2.

Interactive Applications

2.2.2.3.

Weaker Anonymity Guarantees

2.2.3.

Trade-offs Between Latency and Anonymity

2.3.

The Anonymity Trilemma

2.3.1.

Latency Requirements

2.3.2.

Bandwidth Efficiency

2.3.3.

Anonymity Strength

2.3.4.

System Design Compromises

2.4.

2.4.1.

Local Adversary

2.4.1.1.

Network Eavesdropping

2.4.1.2.

Limited Observation Capabilities

2.4.2.

Global Passive Adversary

2.4.2.1.

Complete Network Observation

2.4.2.2.

Traffic Correlation Capabilities

2.4.3.

Active Adversary

2.4.3.1.

Traffic Injection

2.4.3.2.

Node Compromise

2.4.3.3.

Protocol Manipulation

2.4.4.

Adaptive Adversary

2.4.4.1.

Learning Capabilities

2.4.4.2.

Strategy Adjustment

Previous

1. Introduction to Anonymity and Privacy

Go to top

Next

3. The Tor Network Architecture