tdebase/doc/kcontrol/crypto/index.docbook

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<authorgroup>
<author>&Mike.McBride; &Mike.McBride.mail;</author>
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</authorgroup>

<date>2002-10-17</date>
<releaseinfo>3.1</releaseinfo>

<keywordset>
<keyword>KDE</keyword>
<keyword>KControl</keyword>
<keyword>crypto</keyword>
<keyword>SSL</keyword>
<keyword>encryption</keyword>

</keywordset>
</articleinfo>

<sect1 id="crypto">

<title>Encryption Configuration</title>

<sect2 id="crypto-intro">
<title>Introduction</title>
<para>Many applications within &kde; are capable of exchanging information using
encrypted files and/or network transmissions.</para>
</sect2>

<sect2 id="crypto-use">
<title>Use</title>

<warning><para>All encryption schemes are only as strong as their
weakest link.  In general, unless you have some previous
training/knowledge, it is better to leave this module
unchanged.</para></warning>

<para>The options within this module can be divided into two
groups:</para>

<para>Two options along the bottom of the module, <guilabel>Warn on
entering SSL Mode</guilabel> and <guilabel>Warn on leaving SSL
mode</guilabel>, allow you to determine if &kde; should inform you when
you enter or leave SSL encryption.</para> 

<para>The remainder of the options are about determining which
encryption methods to use, and which should not be used. Once you have
selected the appropriate encryption protocols, simply click
<guibutton>Apply</guibutton> to commit your changes.</para>

<tip><para>Only make changes to this module if specific information
about the strength or weakness of a particular encryption method is
given to you from <emphasis>a reliable source</emphasis>.</para></tip>

</sect2>

<!-- Ugh.. write a bunch of stuff about the rest of it -->
<sect2 id="ssl_tab">
<title>The <guilabel>SSL</guilabel> Tab</title>

<para>The first option is <guilabel>Enable TLS support if supported by
the server</guilabel>. <acronym>TLS</acronym> is Transport Layer
Security, and is the newest version of <acronym>SSL</acronym>.  It
integrates better than <acronym>SSL</acronym> with other protocols,
and it has replaced <acronym>SSL</acronym> in protocols such as POP3
and <acronym>SMTP</acronym>.</para>

<para>Then next options are <guilabel>Enable SSL v2</guilabel> and
<guilabel>Enable SSL v3</guilabel>.  These are the second and third
revision of the <acronym>SSL</acronym> protocol, and it is normal to
enable both.</para>

<para>There are several different <firstterm>Ciphers</firstterm>
available, and you can enable these separately in the lists labeled
<guilabel>SSL v2 Ciphers to Use</guilabel> and <guilabel>SSL v3
Ciphers to Use</guilabel>.  The actual protocol to use is negotiated
by the application and the server when the connection is
created.</para>

<para>There are several <guilabel>Cipher Wizards</guilabel> to help
you choose a set that is suitable for your use.</para>

<variablelist>
<varlistentry>
<term><guibutton>Most Compatible</guibutton></term>
<listitem>
<para>Select the settings found to be most compatible with the most
servers.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guibutton>US Ciphers Only</guibutton></term>
<listitem>
<para>Select only the US <quote>strong</quote> (128 bit or greater)
ciphers.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guibutton>Export Ciphers Only</guibutton></term>
<listitem>
<para>Select only the weak (56 bit or less) ciphers.</para>
</listitem>
</varlistentry>
<varlistentry>
<term><guibutton>Enable All</guibutton></term>
<listitem>
<para>Select all ciphers and methods.</para>
</listitem>
</varlistentry>
</variablelist>

<para>Finally, there are some general <acronym>SSL</acronym> settings.</para>

<variablelist>
<varlistentry>
<term><guilabel>Use EGD</guilabel></term>
<listitem>
<para>If selected, <application>OpenSSL</application> will be asked to
use the entropy gathering daemon (<acronym>EGD</acronym>) for
initializing the pseudo-random number generator.</para>
</listitem>
</varlistentry>

<varlistentry>
<term><guilabel>Use entropy file</guilabel></term>
<listitem>
<para>If selected, <application>OpenSSL</application> will be asked to
use the given file as entropy for initializing the pseudo-random number
generator.</para>
</listitem>
</varlistentry>

<varlistentry>
<term><guilabel>Warn on entering SSL mode</guilabel></term>
<listitem>
<para>If selected, you will be notified when entering an
<acronym>SSL</acronym> enabled site.</para>
</listitem>
</varlistentry>

<varlistentry>
<term><guilabel>Warn on leaving SSL mode</guilabel></term>
<listitem>
<para>If selected, you will be notified when leaving an
<acronym>SSL</acronym> based site.</para>
</listitem>
</varlistentry>

<varlistentry>
<term><guilabel>Warn on sending unencrypted data</guilabel></term>
<listitem>
<para>If selected, you will be notified before sending unencrypted
data via a web browser.</para>
</listitem>
</varlistentry>
</variablelist>
</sect2>

<sect2 id="openssl">
<title>The <guilabel>OpenSSL</guilabel> Tab</title>

<para>Here you can test if your <application>OpenSSL</application>
libraries have been detected correctly by &kde;, with the
<guibutton>Test</guibutton> button.</para>

<para>If the test is unsuccessful, you can specify a path to the
libraries in the field labelled <guilabel>Path to OpenSSL Shared
Libraries</guilabel>.</para>

</sect2>

<sect2 id="your-certificates">
<title>The <guilabel>Your Certificates</guilabel> Tab</title>

<para>The list shows which certificates of yours &kde; knows about.
You can easily manage them from here.</para>

</sect2>

<sect2 id="authentication">
<title>The <guilabel>Authentication</guilabel> Tab</title>

<para>Not yet documented<!-- No "what's this" to get any info from --></para>
</sect2>

<sect2 id="peer-ssl-certificates">
<title>The <guilabel>Peer SSL Certificates</guilabel> Tab</title>

<para>The list box shows which site and personal certificates &kde;
knows about.  You can easily manage them from here.</para>

</sect2>

</sect1>

</article>