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<?xml version="1.0" encoding="utf-8" ?>
<!DOCTYPE chapter SYSTEM "chapter.dtd">
<chapter>
<header>
<copyright>
<year>2008</year>
<year>2015</year>
<holder>Ericsson AB, All Rights Reserved</holder>
</copyright>
<legalnotice>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
The Initial Developer of the Original Code is Ericsson AB.
</legalnotice>
<title>Introduction</title>
<prepared>Ingela Anderton Andin</prepared>
<responsible></responsible>
<docno></docno>
<approved></approved>
<checked></checked>
<date>2008-01-22</date>
<rev>A</rev>
<file>introduction.xml</file>
</header>
<section>
<title>Purpose</title>
<p>The Public Key application deals with public-key related file
formats, digital signatures, and <url href="http://www.ietf.org/rfc/rfc5280.txt">
X-509 certificates</url>. It is a library application that
provides encode/decode, sign/verify, encrypt/decrypt, and similar
functionality. It does not read or write files, it expects or returns
file contents or partial file contents as binaries.
</p>
</section>
<section>
<title>Prerequisites</title>
<p>It is assumed that the reader is familiar with the Erlang programming
language and has a basic understanding of the concepts of using public-keys
and digital certificates.</p>
</section>
<section>
<title>Performance Tips</title>
<p>The Public Key decode- and encode-functions try to use the NIFs
in the ASN.1 compilers runtime modules, if they can be found.
Thus, to have the ASN1 application in the
path of your system gives the best performance.</p>
</section>
</chapter>
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