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<h1 class="topictitle1">Select a digital certificate to use</h1>
<div><p>You should consider several factors when deciding which digital
certificate to use. You can use your system's default certificate or you can
specify another certificate to use.</p>
<p>You want to use your system's default certificate if:</p>
<ul><li>You do not have any specific security requirements for your Java™ application.</li>
<li>You do not know what kind of security you need for your Java application.</li>
<li>Your system's default certificate meets the security requirements for
your Java application.</li>
</ul>
<div class="note"><span class="notetitle">Note:</span> If you decide that you want to use your system's default certificate,
check with your system administrator to make sure that a default system certificate
has been created. For more information on digital certificate management,
see <a href="../rzahu/rzahurzahu4aagetstarteddcm.htm" target="_blank">Getting
started with IBM<sup>®</sup> Digital
Certificate Manager</a>.</div>
<div class="p">If you do not want to use your system's default certificate, you need to
choose a different certificate to use. You can choose from two types of certificates:<ul><li><strong>User certificate</strong> that identifies the user of the application.</li>
<li><strong>System certificate</strong> that identifies the system on which the application
is running.</li>
</ul>
</div>
<div class="p">You should use a user certificate if:<ul><li>your application runs as a client application.</li>
<li>you want the certificate to identify the user who is working with the
application.</li>
</ul>
</div>
<div class="p">You should use a system certificate if:<ul><li>your application runs as a server application.</li>
<li>you want the certificate to identify on which system the application is
running.</li>
</ul>
</div>
<p>Once you know what kind of certificate you need, you can choose from any
of the digital certificates in any of the certificate containers that you
are able to access.</p>
</div>
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<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="usessl.htm" title="SSL provides a means of authenticating a server and a client to provide privacy and data integrity. All SSL communications begin with a &#34;handshake&#34; between the server and the client. During the handshake, SSL negotiates the cipher suite that the client and server use to communicate with each other. This cipher suite is a combination of the various security features available through SSL. You can only use SSL with J2SDK, version 1.3. You can use the Java Secure Socket Extension (JSSE, version 1.0.8), which is the Java implementation of secure sockets layer (SSL), to make your Java application more secure.">Using SSL (JSSE, version 1.0.8)</a></div>
</div>
<div class="relconcepts"><strong>Related concepts</strong><br />
<div><a href="sslusedc.htm" title="To use secure sockets layer (SSL), you must run your Java application using a digital certificate.">Use the digital certificate when you run your Java application</a></div>
</div>
<div class="reltasks"><strong>Related tasks</strong><br />
<div><a href="sslprepf.htm" title="To prepare your system to use secure sockets layer (SSL), you need to install Licensed Programs. the Digital Certificate Manager LP:">Prepare iSeries server for secure sockets layer support</a></div>
<div><a href="sslsfact.htm" title="To use secure sockets layer (SSL) with your existing code, you must first change your code to use socket factories.">Change your Java code to use socket factories</a></div>
<div><a href="sslmcode.htm">Change your Java code to use secure sockets layer</a></div>
</div>
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