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<img alt="Erlang logo" src="../../../../doc/erlang-logo.png"><br><small><a href="users_guide.html">User's Guide</a><br><a href="index.html">Reference Manual</a><br><a href="release_notes.html">Release Notes</a><br><a href="../pdf/public_key-0.17.pdf">PDF</a><br><a href="../../../../doc/index.html">Top</a></small><p><strong>public_key</strong><br><strong>User's Guide</strong><br><small>Version 0.17</small></p>
<br><a href="javascript:openAllFlips()">Expand All</a><br><a href="javascript:closeAllFlips()">Contract All</a><p><small><strong>Chapters</strong></small></p>
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<li id="loadscrollpos" title="Introduction" expanded="true">Introduction<ul>
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<li title="Purpose"><a href="introduction.html#id56658">Purpose</a></li>
<li title="Prerequisites"><a href="introduction.html#id62235">Prerequisites</a></li>
<li title="Performance tips"><a href="introduction.html#id56630">Performance tips</a></li>
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<li title="RSA as defined by the PKCS-1 standard and RFC 3447."><a href="public_key_records.html#id60524">RSA as defined by the PKCS-1 standard and RFC 3447.</a></li>
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<li id="no" title="Using the public_key API" expanded="false">Using the public_key API<ul>
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<li title="RSA public key cryptography "><a href="using_public_key.html#id63884">RSA public key cryptography </a></li>
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<h1>1 Introduction</h1>
<h3><a name="id56658">1.1
Purpose</a></h3>
<p> This application provides an API to public key infrastructure
from <span class="bold_code"><a href="http://www.ietf.org/rfc/rfc5280.txt">RFC
5280</a></span> (X.509 certificates) and public key formats defined by
the <span class="bold_code"><a href="http://www.rsa.com/rsalabs/node.asp?id=2124">
PKCS-standard</a></span></p>
<h3><a name="id62235">1.2
Prerequisites</a></h3>
<p>It is assumed that the reader has a basic understanding
of the concepts of using public keys and digital certificates.</p>
<h3><a name="id56630">1.3
Performance tips</a></h3>
<p>The public_key decode and encode functions will try to use the nifs
which are in the asn1 compilers runtime modules if they can be found.
So for the best performance you want to have the asn1 application in the
path of your system. </p>
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