About these specifications
Introduction
A short introduction to Tor
1. Notation and conventions
The core Tor protocol
Tor Protocol Specification
Tor directory protocol, version 3
Tor Path Specification
Tor Guard Specification
Tor Vanguards Specification
Tor Padding Specification
Preventing Denial-Of-Service
1. Overview
2. Memory exhaustion
Additional behaviors for clients
Tor's extensions to the SOCKS protocol
Special Hostnames in Tor
Onion services
Tor Rendezvous Specification - Version 3
Proof of Work for onion service introduction
Anticensorship tools and protocols
BridgeDB specification
Extended ORPort for pluggable transports
Pluggable Transport Specification (Version 1)
For C Tor only
The Tor Control Protocol
How Tor Version Numbers Work
Less commonly needed file formats
Tor Bandwidth File Format
Implementation details
Tor Directory List Format
Reserved names and numbers
Tor network parameters
SSH protocol extensions
Unfinished
Glossary
Maintenance and and editing of the Tor Specifications
About the Tor Specifications documents
Style guide
Permalinks

Tor Specifications

Router operation and formats

This section describes how relays must behave when publishing their information to the directory authorities, and the formats that they use to do so.