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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<title>Digital Signature Initiative Overview</title>
</head>
<body text="#000000" bgcolor="#FFFFFF">
<h2><a href="http://www.w3.org/"><img
src="http://www.w3.org/Icons/WWW/w3c_home" alt="W3C" border="0" height="48"
width="72">
</a><a href="http://www.w3.org/"> </a><a href="../TandS/"><img
src="http://www.w3.org/Icons/tands.gif" alt="Technology and Society Domain"
border="0" height="48" width="212">
</a><img src="http://www.w3.org/DSig/DSigLogo.gif"
border="0" alt="Digital Signature Initiative" height="48" width="212"></h2>
<center>
<font size="-1">[<a href="Activity.html">Activity Statement</a>] [<a
href="Group/">Member Only Links</a>] [<a
href="DSigResources.html">Background</a>]</font></center>
<h2>Digital Signature Initiative</h2>
<p>This is W3C's homepage for signed PICS labels (DSig1.0). This Activity has
been completed upon the delivery of the following specifications and software
code. Present W3C activities are linked from the <a
href="http://www.w3.org/">W3C Homepage</a> (including <a
href="http://www.w3.org/Signature">XML-Signatures</a>).</p>
<h2>DSig 1.0</h2>
<p>[<a href="http://www.w3.org/TR/REC-DSig-label/">Recommendation</a>]</p>
<p>The DSig 1.0 recommendation describes a method of utilizing PICS 1.1 labels
with extensions to meet this goal. It also provides detailed usage guidelines
for creating PICS 1.1 labels, which are valid DSig 1.0 Signature labels.</p>
<p>DSig 1.0 signature labels inherit both a means of transporting a signature
block data and a simple framework for making the machine-readable assertions
from the underlying PICS framework. PICS compliant applications can
syntactically parse DSig 1.0 signature labels; only cryptographic functions
need to be added to PICS-aware applications in order to make use of the
semantic content of a DSig signature.</p>
<p>Future work, will extend DSig to other metadata formats such as XML and/or
RDF. This will extend the richness of the DSig assertion model.</p>
<h2>Related Resources</h2>
<ul>
<li>W3C Sample Code Library for DSig and PICS - <a
href="http://www.w3.org/PICS/refcode/">PICS/DSig Standard Library</a></li>
<li><a href="http://www.w3.org/DSig/DSigResources.html">DSig Background
Resources</a></li>
<li><a href="http://www.w3.org/Security/">W3C Security Homepage</a></li>
<li>Live DSig sample implementation by Riccardo Sabbatini
<ul>
<li>Sign - http://www.csr.unibo.it/ra/sr.htm (no longer available)</li>
<li>Verify - ttp://www.csr.unibo.it/ra/v.htm (no longer available)</li>
</ul>
</li>
</ul>
<p></p>
<hr>
<br>
<a href="mailto:reagle@w3.org">Joseph Reagle</a><br>
19 June 1999
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href="http://www.w3.org/Consortium/Legal/ipr-notice.html#Copyright">Copyright</a>
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