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zzz
2020-04-28 20:52:12 +00:00
parent 0a81c6d360
commit 8d6a79cac5
2 changed files with 16 additions and 5 deletions
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12
i2p2www/pages/site/docs/how/elgamal-aes.html
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@@ -1,7 +1,7 @@
{% extends "global/layout.html" %}
{% block title %}{% trans %}ElGamal/AES + SessionTag Encryption{% endtrans %}{% endblock %}
{% block lastupdated %}{% trans %}January 2016{% endtrans %}{% endblock %}
{% block accuratefor %}0.9.24{% endblock %}
{% block lastupdated %}April 2020{% endblock %}
{% block accuratefor %}0.9.46{% endblock %}
{% block content %}
<h2>{% trans %}Overview{% endtrans %}</h2>
<p>{% trans -%}
@@ -342,6 +342,14 @@ See the <a href="{{ i2cpspec }}#msg_SendMessageExpires">I2CP Send Message Expire
<h2 id="future">{% trans %}Future Work{% endtrans %}</h2>
<p><b>Note:</b>
ElGamal/AES+SessionTags is being replaced with ECIES-X25519-AEAD-Ratchet (Proposal 144).
The issues and ideas referenced below have been incorporated
into the design of the new protocol.
The following items will not be addressed in ElGamal/AES+SessionTags.
</p>
<p>{% trans -%}
There are many possible areas to tune the Session Key Manager's algorithms;
some may interact with the streaming library behavior, or have significant

9
i2p2www/spec/proposals/144-ecies-x25519-aead-ratchet.rst
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@@ -5,7 +5,7 @@ ECIES-X25519-AEAD-Ratchet
:author: zzz, chisana, orignal
:created: 2018-11-22
:thread: http://zzz.i2p/topics/2639
:lastupdated: 2020-04-27
:lastupdated: 2020-04-28
:status: Open
:target: 0.9.46
:implementedin: 0.9.46
@@ -3512,11 +3512,14 @@ Storage
The sender generates tags and keys on the fly, so there is no storage.
This cuts overall storage requirements in half compared to ElGamal/AES.
ECIES tags are 8 bytes instead of 32 for ElGamal/AES.
This cuts overall storage requiremens by another factor of 4.
This cuts overall storage requirements by another factor of 4.
Per-tag session keys are not stored at the receiver except for "gaps",
which are minimal for reasonable loss rates.
Therefore, the total space savings vs. ElGamal/AES is a factor of 8, or 87%.
The 33% reduction in tag expiration time creates another 33% savings,
assuming short session times.
Therefore, the total space savings vs. ElGamal/AES is a factor of 10.7, or 92%.