{% extends "global/layout.html" %}
{% block title %}{% trans %}Index to Technical Documentation{% endtrans %}{% endblock %}
{% block lastupdated %}2022-04{% endblock %}
{% block accuratefor %}0.9.53{% endblock %}
{% block content %}
<p>{% trans -%}
Following is an index to the technical documentation for I2P.
{%- endtrans %}</p>

<p>{% trans -%}
This index is ordered from the highest to lowest layers.
The higher layers are for "clients" or applications;
the lower layers are inside the router itself.
The interface between applications and the router is the I2CP (I2P Control
Protocol) API.
{%- endtrans %}</p>

<p>{% trans trac='https://i2pgit.org/i2p-hackers/i2p.www/issues' -%}
The I2P Project is committed to maintaining accurate, current documentation.
If you find any inaccuracies in the documents linked below, please
<a href="{{ trac }}">enter a ticket identifying the problem</a>.
{%- endtrans %}</p>

<h2>{% trans %}Index to Technical Documentation{% endtrans %}</h2>

<h3>{% trans %}Overview{% endtrans %}</h3>
<ul class="helplist">
<li><a href="{{ site_url('docs/how/tech-intro') }}">{{ _('Technical Introduction') }}</a></li>
<li><a href="{{ site_url('docs/how/intro') }}">{{ _('A Less-Technical Introduction') }}</a></li>
<li><a href="{{ site_url('docs/how/threat-model') }}">{{ _('Threat model and analysis') }}</a></li>
<li><a href="{{ site_url('comparison') }}">{{ _('Comparisons to other anonymous networks') }}</a></li>
<li><a href="{{ url_for('spec_index') }}">{{ _('Specifications') }}</a></li>
<li><a href="{{ site_url('docs/protocol') }}">{{ _('Protocol stack chart') }}</a></li>
<li><a href="{{ site_url('papers') }}">{{ _('Papers on I2P') }}</a></li>
<li><a href="{{ site_url('about/media') }}">{{ _('Presentations, articles, tutorials, videos, and interviews') }}</a></li>
<li>{% trans pdf=url_for('static', filename='pdf/i2p_philosophy.pdf') %}<a href="{{ pdf }}">Invisible Internet Project (I2P) Project Overview</a> August 28, 2003 (pdf){% endtrans %}</li>
</ul>

<h3>{% trans %}Application-Layer Topics{% endtrans %}</h3>
<ul>
<li><a href="{{ site_url('get-involved/develop/applications') }}">Application Development Overview and Guide</a></li>
<li><a href="{{ site_url('docs/naming') }}">{{ _('Naming and Address Book') }}</a></li>
<li><a href="{{ spec_url('subscription') }}">{{ _('Address Book Subscription Feed Commands') }}</a></li>
<li><a href="{{ site_url('docs/plugins') }}">{{ _('Plugins Overview') }}</a></li>
<li><a href="{{ spec_url('plugin') }}">{{ _('Plugin Specification') }}</a></li>
<li><a href="{{ site_url('docs/applications/managed-clients') }}">{{ _('Managed Clients') }}</a></li>
<li><a href="{{ site_url('docs/applications/embedding') }}">{{ _('Embedding the router in your application') }}</a></li>
<li><a href="{{ site_url('docs/applications/bittorrent') }}">{{ _('Bittorrent over I2P') }}</a></li>
<li><a href="{{ site_url('docs/api/i2pcontrol') }}">{{ _('I2PControl Plugin API') }}</a></li>
<li><a href="{{ spec_url('blockfile') }}">{{ _('hostsdb.blockfile Format') }}</a></li>
<li><a href="{{ spec_url('configuration') }}">{{ _('Configuration File Format') }}</a></li>
</ul>

<h3>{% trans %}Application Layer API and Protocols{% endtrans %}</h3>
{% trans %}High-level, easy-to-use APIs for applications written in any language to send and receive data.{% endtrans %}
<ul><li>
<a href="{{ site_url('get-involved/develop/applications') }}">{{ _('Application Development Overview and Guide') }}</a>
</li><li>
<a href="{{ site_url('docs/api/i2ptunnel') }}">I2PTunnel</a>
</li><li>
<a href="{{ spec_url('configuration') }}">{{ _('I2PTunnel Configuration') }}</a></li>
</li><li>
<a href="{{ site_url('docs/api/socks') }}">SOCKS Proxy</a>
</li><li>
HTTP Proxy
</li><li>
CONNECT Proxy
</li><li>
IRC Proxy
</li><li>
SOCKS IRC Proxy
</li><li>
Streamr Proxy
</li><li>
HTTP Bidir Proxy
</li><li>
<a href="{{ site_url('docs/api/sam') }}">{{ _('SAM Protocol') }}</a>
</li><li>
<a href="{{ site_url('docs/api/samv2') }}">{{ _('SAMv2 Protocol') }}</a>
</li><li>
<a href="{{ site_url('docs/api/samv3') }}">{{ _('SAMv3 Protocol') }}</a>
</li><li>
<a href="{{ site_url('docs/api/bob') }}">{{ _('BOB Protocol') }}</a>
</li></ul>

<h3>{% trans %}End-to-End Transport API and Protocols{% endtrans %}</h3>
{% trans %}The end-to-end protocols used by clients for reliable and unreliable communication.{% endtrans %}
<ul><li>
<a href="{{ site_url('docs/api/streaming') }}">{{ _('Streaming Protocol Overview') }}</a>
</li><li>
<a href="{{ spec_url('streaming') }}">{{ _('Streaming Protocol Specification') }}</a>
</li><li>
<a href="http://{{ i2pconv('idk.i2p/javadoc-i2p') }}/net/i2p/client/streaming/package-summary.html">{{ _('Streaming Javadoc') }}</a>
</li><li>
<a href="{{ spec_url('datagrams') }}">{{ _('Datagrams') }}</a>
</li><li>
<a href="http://{{ i2pconv('idk.i2p/javadoc-i2p') }}/net/i2p/client/datagram/package-summary.html">{{ _('Datagram Javadoc') }}</a>
</li></ul>

<h3>{% trans %}Client-to-Router Interface API and Protocol{% endtrans %}</h3>
{% trans -%}
The lowest-level API used for clients (applications) to send and receive traffic to a router.
Traditionally used only by Java applications and higher-level APIs.
{%- endtrans %}
<ul><li>
<a href="{{ site_url('docs/protocol/i2cp') }}">{{ _('I2CP - I2P Control Protocol / API overview') }}</a>
</li><li>
<a href="{{ spec_url('i2cp') }}">{{ _('I2CP Specification') }}</a>
</li><li>
<a href="http://{{ i2pconv('idk.i2p/javadoc-i2p') }}/net/i2p/client/package-summary.html">{{ _('I2CP API Javadoc') }}</a>
</li><li>
<a href="{{ spec_url('common-structures') }}">{{ _('Common data structures specification') }}</a>
</li><li>
<a href="http://{{ i2pconv('idk.i2p/javadoc-i2p') }}/net/i2p/data/package-summary.html">{{ _('Data Structures Javadoc') }}</a>
</li></ul>

<h3>{% trans %}End-to-End Encryption{% endtrans %}</h3>
{% trans %}How client messages are end-to-end encrypted by the router.{% endtrans %}
<ul>
<li><a href="{{ spec_url('ecies') }}">{{ _('ECIES-X25519-AEAD-Ratchet encryption for destinations') }}</a></li>
<li><a href="{{ spec_url('ecies-routers') }}">{{ _('ECIES-X25519 encryption for routers') }}</a></li>
<li><a href="{{ site_url('docs/how/elgamal-aes') }}">{{ _('ElGamal/AES+SessionTag encryption') }}</a></li>
<li><a href="{{ site_url('docs/how/cryptography') }}">{{ _('ElGamal and AES cryptography details') }}</a></li>
</ul>

<h3>{% trans %}Network Database{% endtrans %}</h3>
{% trans %}Distributed storage and retrieval of information about routers and clients.{% endtrans %}
<ul>
<li><a href="{{ site_url('docs/how/network-database') }}">{{ _('Network database overview, details, and threat analysis') }}</a></li>
<li><a href="{{ site_url('docs/how/cryptography') }}#SHA256">{{ _('Cryptographic hashes') }}</a></li>
<li><a href="{{ site_url('docs/how/cryptography') }}#sig">{{ _('Cryptographic signatures') }}</a></li>
<li><a href="{{ spec_url('red25519') }}">{{ _('Red25519 signatures') }}</a></li>
<li><a href="{{ spec_url('updates') }}">{{ _('Router reseed specification') }}</a></li>
<li><a href="{{ spec_url('b32encrypted') }}">{{ _('Base32 Addresses for Encrypted Leasesets') }}</a></li>
</ul>

<h3>{% trans %}Router Message Protocol{% endtrans %}</h3>
{% trans %}I2P is a message-oriented router. The messages sent between routers are defined by the I2NP protocol.{% endtrans %}
<ul><li>
<a href="{{ site_url('docs/protocol/i2np') }}">{{ _('I2NP - I2P Network Protocol Overview') }}</a>
</li><li>
<a href="{{ spec_url('i2np') }}">{{ _('I2NP Specification') }}</a>
</li><li>
<a href="http://{{ i2pconv('idk.i2p/javadoc-i2p') }}/net/i2p/data/i2np/package-summary.html">{{ _('I2NP Javadoc') }}</a>
</li><li>
<a href="{{ spec_url('common-structures') }}">{{ _('Common data structures specification') }}</a>
</li><li>
<a href="{{ spec_url('encryptedleaseset') }}">{{ _('Encrypted Leaseset specification') }}</a>
</li><li>
<a href="http://{{ i2pconv('idk.i2p/javadoc-i2p') }}/net/i2p/data/package-summary.html">{{ _('Data Structures Javadoc') }}</a>
</li></ul>

<h3>{% trans %}Tunnels{% endtrans %}</h3>
{% trans %}Selecting peers, requesting tunnels through those peers, and encrypting and routing messages through these tunnels.{% endtrans %}
<ul>
<li><a href="{{ site_url('docs/how/peer-selection') }}">{{ _('Peer profiling and selection') }}</a></li>
<li><a href="{{ site_url('docs/how/tunnel-routing') }}">{{ _('Tunnel routing overview') }}</a></li>
<li><a href="{{ site_url('docs/how/garlic-routing') }}">{% trans %}Garlic routing and "garlic" terminology{% endtrans %}</a></li>
<li><a href="{{ site_url('docs/tunnels/implementation') }}">{{ _('Tunnel building and encryption') }}</a></li>
<li><a href="{{ site_url('docs/how/elgamal-aes') }}">{{ _('ElGamal/AES') }}</a> {{ _('for build request encryption') }}</li>
<li><a href="{{ site_url('docs/how/cryptography') }}">{{ _('ElGamal and AES cryptography details') }}</a></li>
<li><a href="{{ spec_url('tunnel-creation') }}">{{ _('Tunnel building specification') }} (ElGamal)</a></li>
<li><a href="{{ spec_url('tunnel-creation-ecies') }}">{{ _('Tunnel building specification') }} (ECIES-X25519)</a></li>
<li><a href="{{ spec_url('tunnel-message') }}">{{ _('Low-level tunnel message specification') }}</a></li>
<li><a href="{{ site_url('docs/tunnels/unidirectional') }}">{{ _('Unidirectional Tunnels') }}</a></li>
<li><a href="{{ url_for('static', filename='pdf/I2P-PET-CON-2009.1.pdf') }}">{{ _('Peer Profiling and Selection in the I2P Anonymous Network') }}</a>
{{ _('2009 paper (pdf), not current but still generally accurate') }}</li>
</ul>

<h3>{% trans %}Transport Layer{% endtrans %}</h3>
{% trans %}The protocols for direct (point-to-point) router to router communication.{% endtrans %}
<ul><li>
<a href="{{ site_url('docs/transport') }}">{{ _('Transport layer overview') }}</a>
</li><li>
<a href="{{ site_url('docs/transport/ntcp') }}">NTCP</a> {{ _('TCP-based transport overview and specification') }}
</li><li>
<a href="{{ spec_url('ntcp2') }}">{{ _('NTCP2 specification') }}</a>
</li><li>
<a href="{{ site_url('docs/transport/ssu') }}">SSU</a> {{ _('UDP-based transport overview') }}
</li><li>
<a href="{{ spec_url('ssu') }}">{{ _('SSU specification') }}</a>
</li><li>
<a href="{{ site_url('docs/how/cryptography') }}#tcp">{{ _('NTCP transport encryption') }}</a>
</li><li>
<a href="{{ site_url('docs/how/cryptography') }}#udp">{{ _('SSU transport encryption') }}</a>
</li><li>
<a href="http://{{ i2pconv('idk.i2p/javadoc-i2p') }}/net/i2p/router/transport/package-summary.html">{{ _('Transport Javadoc') }}</a>
</li><li>
<a href="http://{{ i2pconv('idk.i2p/javadoc-i2p') }}/net/i2p/router/transport/ntcp/package-summary.html">{{ _('NTCP Javadoc') }}</a>
</li><li>
<a href="http://{{ i2pconv('idk.i2p/javadoc-i2p') }}/net/i2p/router/transport/udp/package-summary.html">{{ _('SSU Javadoc') }}</a>
</li></ul>

<h3>{% trans %}Other Router Topics{% endtrans %}</h3>
<ul><li>
<a href="{{ spec_url('updates') }}">{{ _('Router software updates') }}</a>
</li><li>
<a href="{{ spec_url('updates') }}">{{ _('Router reseed specification') }}</a>
</li><li>
<a href="{{ site_url('misc/jbigi') }}">{{ _('Native BigInteger Library') }}</a>
</li><li>
{{ _('Time synchronization and NTP') }}
</li><li>
<a href="{{ site_url('about/performance') }}">{{ _('Performance') }}</a>
</li><li>
<a href="{{ spec_url('configuration') }}">{{ _('Configuration File Format') }}</a></li>
</li><li>
<a href="{{ spec_url('geoip') }}">GeoIP File Format</a></li>
</li></ul>

<h3>{% trans %}Developer's Guides and Resources{% endtrans %}</h3>
<ul><li>
<a href="{{ site_url('get-involved/guides/new-developers') }}">{% trans %}New Developer's Guide{% endtrans %}</a>
</li><li>
<a href="{{ site_url('get-involved/guides/new-translators') }}">{% trans %}New Translator's Guide{% endtrans %}</a>
</li><li>
<a href="{{ site_url('get-involved/guides/monotone') }}">{{ _('Monotone Guide') }}</a>
</li><li>
<a href="{{ site_url('get-involved/guides/dev-guidelines') }}">{{ _('Developer Guidelines') }}</a>
</li><li>
{% trans %}Javadocs on the standard internet:{% endtrans %}
<a href="https://docs.i2p-projekt.de/javadoc/">{% trans num=1 %}Server {{ num }}{% endtrans %}</a>
<a href="https://eyedeekay.github.io/javadoc-i2p/">{% trans num=3 %}Server {{ num }}{% endtrans %}</a>
{% trans %}Note: always verify that javadocs are current by checking the release number.{% endtrans %}
</li><li>
{% trans %}Javadocs inside I2P:{% endtrans %}
<!--
down (kytv)
<a href="http://{{ i2pconv('i2p-javadocs.i2p') }}">{% trans num=1 %}Server {{ num }}{% endtrans %}</a>
ancient (str4d)
<a href="http://{{ i2pconv('i2pdocs.str4d.i2p') }}/i2p.i2p/javadoc/">{% trans num=2 %}Server {{ num }}{% endtrans %}</a>
-->
<a href="http://{{ i2pconv('idk.i2p') }}/javadoc-i2p/">{% trans num=3 %}Server {{ num }}{% endtrans %}</a>
<!--
  <a href="http://{{ i2pconv('docs.i2p2.i2p') }}/javadoc/">Server 4 - out of date, incomplete</a>
-->
{% trans %}Note: always verify that javadocs are current by checking the release number.{% endtrans %}
</li><li>
<a href="{{ site_url('spec/proposals') }}">{{ _('Proposals') }}</a>
</li><li>
<a href="{{ site_url('docs/applications/embedding') }}">{{ _('Embedding the router in your application') }}</a>
</li><li>
<a href="{{ site_url('get-involved/guides/reseed') }}">{{ _('How to Set up a Reseed Server') }}</a>
</li><li>
<a href="{{ site_url('docs/ports') }}">{{ _('Ports used by I2P') }}</a>
</li><li>
<a href="{{ site_url('misc/manual-wrapper') }}">{{ _('Updating the wrapper manually') }}</a>
</li><li>
<a href="http://{{ i2pconv('i2pforum.i2p') }}">{{ _('User forum') }}</a>
</li><li>
<a href="http://{{ i2pconv('zzz.i2p') }}/">{{ _('Developer forum inside I2P') }}</a>
</li><li>
<a href="https://i2pgit.org/i2p-hackers/i2p.i2p/issues">{{ _('Bug tracker') }}</a>
</li><li>
<a href="https://github.com/i2p/i2p.i2p">{{ _('I2P Source exported to GitHub') }}</a>
</li><li>
<a href="http://git.idk.i2p/i2p/i2p.i2p.git">{{ _('I2P Source Git Repo inside I2P') }}</a>
</li><li>
<a href="https://www.transifex.net/projects/p/I2P/">{{ _('Source translation at Transifex') }}</a>
</li><li>
<a href="{{ site_url('get-involved/roadmap') }}">{{ _('Roadmap') }}</a>
</li><li>
<a href="{{ site_url('get-involved/todo') }}">{{ _('To Do List') }}</a> ({{ _('not current') }})
</li><li>
<a href="{{ site_url('misc/invisiblenet') }}">Ancient invisiblenet I2P documents</a> (2003)
</li><li>
<a href="http://zzz.i2p/archive/index.html">The ancient I2P mailing list</a> 2004-07 to 2006-10
<!--
</li><li>
<a href="http://news.gmane.org/gmane.comp.security.invisiblenet.iip.devel">The even more ancient invisiblenet mailing list</a> 2002-10 to 2004-01 (gmane)
-->
</li></ul>


{% endblock %}