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# Summary
[About these specifications](./README.md)
# Introduction
- [A short introduction to Tor](./intro/index.md)
- [Notation and conventions](./intro/conventions.md)
# The core Tor protocol
- [`Tor Protocol Specification`](./tor-spec/index.md)
- [Preliminaries](./tor-spec/preliminaries.md)
- [Relay keys and identities](./tor-spec/relay-keys.md)
- [Channels](./tor-spec/channels.md)
- [Negotiating and initializing channels](./tor-spec/negotiating-channels.md)
- [Obsolete channel negotiation handshakes](./tor-spec/obsolete-channels.md)
- [Cells (messages on channels)](./tor-spec/cell-packet-format.md)
- [Circuit management](./tor-spec/circuit-management.md)
- [CREATE and CREATED cells](./tor-spec/create-created-cells.md)
- [Setting circuit keys](./tor-spec/setting-circuit-keys.md)
- [Creating circuits](./tor-spec/creating-circuits.md)
- [Tearing down circuits](./tor-spec/tearing-down-circuits.md)
- [Routing relay cells](./tor-spec/routing-relay-cells.md)
- [Handling relay_early cells](./tor-spec/relay-early.md)
- [Application connections and stream management](./tor-spec/streams.md)
- [Relay cells](./tor-spec/relay-cells.md)
- [Opening streams and transferring data](./tor-spec/opening-streams.md)
- [Closing streams](./tor-spec/closing-streams.md)
- [Remote hostname lookup](./tor-spec/remote-hostname-lookup.md)
- [Flow control](./tor-spec/flow-control.md)
- [Subprotocol versioning](./tor-spec/subprotocol-versioning.md)
- [Certificates in Tor](./cert-spec.md)
- [`Tor directory protocol, version 3`](./dir-spec/index.md)
- [Outline](./dir-spec/outline.md)
- [Router operation and formats](./dir-spec/router-operation-formats.md)
- [Uploading server descriptors and extra-info documents](./dir-spec/uploading-relay-documents.md)
- [Server descriptor format](./dir-spec/server-descriptor-format.md)
- [Extra-info document format](./dir-spec/extra-info-document-format.md)
- [Nonterminals in server descriptors](./dir-spec/nonterminals-server-descriptors.md)
- [Directory authority operation and formats](./dir-spec/directory-authority-operation-formats.md)
- [Creating key certificates](./dir-spec/creating-key-certificates.md)
- [Accepting server descriptor and extra-info document uploads](./dir-spec/accepting-relay-documents.md)
- [Computing microdescriptors](./dir-spec/computing-microdescriptors.md)
- [Exchanging votes](./dir-spec/exchanging-votes.md)
- [Vote and consensus status document formats](./dir-spec/consensus-formats.md)
- [Assigning flags in a vote](./dir-spec/assigning-flags-vote.md)
- [Serving bandwidth list files](./dir-spec/serving-bandwidth-list-files.md)
- [Downloading information from other directory authorities](./dir-spec/downloading-from-other-auths.md)
- [Computing a consensus from a set of votes](./dir-spec/computing-consensus.md)
- [Exchanging detached signatures](./dir-spec/exchanging-detached-signatures.md)
- [Publishing the signed consensus](./dir-spec/publishing-consensus.md)
- [Directory cache operation](./dir-spec/directory-cache-operation.md)
- [Client operation](./dir-spec/client-operation.md)
- [Standards compliance](./dir-spec/standards-compliance.md)
- [Consensus-negotiation timeline.](./dir-spec/consensus-negotiation-timeline.md)
- [General-use HTTP URLs](./dir-spec/general-use-http-urls.md)
- [Converting a curve25519 public key to an ed25519 public key](./dir-spec/converting-to-ed25519.md)
- [Inferring missing proto lines.](./dir-spec/inferring-missing-proto-lines.md)
- [Limited ed diff format](./dir-spec/limited-ed-diff-format.md)
- [`Tor Shared Random Subsystem Specification`](./srv-spec/index.md)
- [Introduction](./srv-spec/introduction.md)
- [Overview](./srv-spec/overview.md)
- [Protocol](./srv-spec/protocol.md)
- [Specification \[SPEC\]](./srv-spec/specification.md)
- [Security Analysis](./srv-spec/security-analysis.md)
- [Discussion](./srv-spec/discussion.md)
- [Acknowledgements](./srv-spec/acknowledgements.md)
- [`Tor Path Specification`](./path-spec/index.md)
- [General operation](./path-spec/general-operation.md)
- [Building circuits](./path-spec/building-circuits.md)
- [When we build](./path-spec/when-we-build.md)
- [Path selection and constraints](./path-spec/path-selection-constraints.md)
- [Cannibalizing circuits](./path-spec/cannibalizing-circuits.md)
- [Learning when to give up ("timeout") on circuit construction](./path-spec/learning-timeouts.md)
- [Handling failure](./path-spec/handling-failure.md)
- [Attaching streams to circuits](./path-spec/attaching-streams-to-circuits.md)
- [Hidden-service related circuits](./path-spec/hidden-service-related-circuits.md)
- [Guard nodes](./path-spec/guard-nodes.md)
- [Server descriptor purposes](./path-spec/server-descriptor-purposes.md)
- [Detecting route manipulation by Guard nodes (Path Bias)](./path-spec/detecting-route-manipulation.md)
- [`Tor Guard Specification`](./guard-spec/index.md)
- [State instances](./guard-spec/state-instances.md)
- [Circuit Creation, Entry Guard Selection (1000 foot view)](./guard-spec/guard-selection/index.md)
- [The algorithm.](./guard-spec/algorithm.md)
- [Appendices](./guard-spec/appendices.md)
- [`Tor Vanguards Specification`](./vanguards-spec/index.md)
- [Full Vanguards](./vanguards-spec/full-vanguards.md)
- [Vanguards-Lite](./vanguards-spec/vanguards-lite.md)
- [Path Construction](./vanguards-spec/path-construction.md)
- [Statistical Analysis](./vanguards-spec/vanguards-stats.md)
- [`Tor Padding Specification`](./padding-spec/index.md)
- [Overview](./padding-spec/overview.md)
- [Connection-level padding](./padding-spec/connection-level-padding.md)
- [Circuit-level padding](./padding-spec/circuit-level-padding.md)
- [Acknowledgments](./padding-spec/acknowledgments.md)
- [`Preventing Denial-Of-Service`](./dos-spec/index.md)
- [Overview](./dos-spec/overview.md)
- [Memory exhaustion](./dos-spec/memory-exhaustion.md)
# Additional behaviors for clients
- [`Tor's extensions to the SOCKS protocol`](./socks-extensions.md)
- [`Special Hostnames in Tor`](./address-spec.md)
# Onion services
- [`Tor Rendezvous Specification - Version 3`](./rend-spec/index.md)
- [Hidden services: overview and preliminaries.](./rend-spec/overview.md)
- [Protocol overview](./rend-spec/protocol-overview.md)
- [Generating and publishing hidden service descriptors \[HSDIR\]](./rend-spec/hsdesc.md)
- [Deriving blinded keys and subcredentials \[SUBCRED\]](./rend-spec/deriving-keys.md)
- [Publishing shared random values \[PUB-SHAREDRANDOM\]](./rend-spec/shared-random.md)
- [Hidden service descriptors: outer wrapper \[DESC-OUTER\]](./rend-spec/hsdesc-outer.md)
- [Hidden service descriptors: encryption format \[HS-DESC-ENC\]](./rend-spec/hsdesc-encrypt.md)
- [The introduction protocol \[INTRO-PROTOCOL\]](./rend-spec/introduction-protocol.md)
- [The rendezvous protocol](./rend-spec/rendezvous-protocol.md)
- [Encrypting data between client and host](./rend-spec/encrypting-user-data.md)
- [Encoding onion addresses \[ONIONADDRESS\]](./rend-spec/encoding-onion-addresses.md)
- [Managing streams](./rend-spec/managing-streams.md)
- [References](./rend-spec/references.md)
- [Appendix A: Signature scheme with key blinding \[KEYBLIND\]](./rend-spec/keyblinding-scheme.md)
- [Appendix B: Selecting nodes \[PICKNODES\]](./rend-spec/selecting-nodes-picknodes.md)
- [Appendix C: Recommendations for searching for vanity .onions \[VANITY\]](./rend-spec/vanity-onions.md)
- [Appendix D: (removed)]()
- [Appendix E: Reserved numbers](./rend-spec/reserved-numbers.md)
- [Appendix F: Hidden service directory format \[HIDSERVDIR-FORMAT\]](./rend-spec/fs-contents.md)
- [Appendix G: Managing authorized client data \[CLIENT-AUTH-MGMT\]](./rend-spec/client-authorization.md)
- [Appendix F: Two methods for managing revision counters.](./rend-spec/revision-counter-mgt.md)
- [Appendix G: Test vectors](./rend-spec/test-vectors.md)
- [`Proof of Work for onion service introduction`](./hspow-spec/index.md)
- [Motivation](./hspow-spec/motivation.md)
- [Common protocol](./hspow-spec/common-protocol.md)
- [Version 1, Equi-X and Blake2b](./hspow-spec/v1-equix.md)
- [Analysis and discussion](./hspow-spec/analysis-discussion.md)
# Anticensorship tools and protocols
- [`BridgeDB specification`](./bridgedb-spec.md)
- [`Extended ORPort for pluggable transports`](./ext-orport-spec.md)
- [`Pluggable Transport Specification (Version 1)`](./pt-spec/index.md)
- [Introduction](./pt-spec/introduction.md)
- [Architecture Overview](./pt-spec/architecture-overview.md)
- [Specification](./pt-spec/specification.md)
- [Pluggable Transport Naming](./pt-spec/naming.md)
- [Pluggable Transport Configuration Environment Variables](./pt-spec/configuration-environment.md)
- [Pluggable Transport To Parent Process Communication](./pt-spec/ipc.md)
- [Pluggable Transport Shutdown](./pt-spec/shutdown.md)
- [Pluggable Transport Client Per-Connection Arguments](./pt-spec/per-connection-args.md)
- [Anonymity Considerations](./pt-spec/anonymity-considerations.md)
- [References](./pt-spec/references.md)
- [Acknowledgments](./pt-spec/acknowledgments.md)
- [Appendix A: Example Client Pluggable Transport Session](./pt-spec/example-client-session.md)
- [Appendix B: Example Server Pluggable Transport Session](./pt-spec/example-server-session.md)
# For C Tor only
- [`The Tor Control Protocol`](./control-spec/index.md)
- [Protocol outline](./control-spec/protocol-outline.md)
- [Message format](./control-spec/message-format.md)
- [Commands](./control-spec/commands.md)
- [Replies](./control-spec/replies.md)
- [Implementation notes](./control-spec/implementation-notes.md)
- [`How Tor Version Numbers Work`](./version-spec.md)
# Less commonly needed file formats
- [`Tor Bandwidth File Format`](./bandwidth-file-spec/index.md)
- [Scope and preliminaries](./bandwidth-file-spec/scope-preliminaries.md)
- [Format details](./bandwidth-file-spec/format-details.md)
- [Definitions](./bandwidth-file-spec/definitions.md)
- [Header List format](./bandwidth-file-spec/header-list-format.md)
- [Relay Line format](./bandwidth-file-spec/relay-line-format.md)
- [Implementation details](./bandwidth-file-spec/implementation-details.md)
- [Sample data](./bandwidth-file-spec/sample-data.md)
- [Scaling bandwidths](./bandwidth-file-spec/scaling-bandwidths.md)
# Implementation details
- [`Tor Directory List Format`](./dir-list-spec.md)
# Reserved names and numbers
- [`Tor network parameters`](./param-spec.md)
- [`SSH protocol extensions`](./ssh-protocols.md)
# Unfinished
- [`Glossary`](./glossary.md)
# Maintenance and and editing of the Tor Specifications
- [`About the Tor Specifications documents`](./back-matter.md)
- [`Style guide`](./STYLE.md)
- [`Permalinks`](./permalinks.md)
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