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<HTML><HEAD><TITLE>Certification Authority</TITLE><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.55"><LINKREL="HOME"TITLE="The Open–source PKI Book"HREF="ospki-book.htm"><LINKREL="UP"TITLE="Introduction to Cryptography"HREF="introduction-to-cryptography.htm"><LINKREL="PREVIOUS"TITLE="Certificates"HREF="certificates.htm"><LINKREL="NEXT"TITLE="Basic functionality of a Public Key Infrastructure[TODO]"HREF="description-pki.htm"></HEAD><BODYCLASS="SECT1"BGCOLOR="#FFFFFF"TEXT="#000000"LINK="#0000FF"VLINK="#840084"ALINK="#0000FF"><DIVCLASS="NAVHEADER"><TABLEWIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><THCOLSPAN="3"ALIGN="center">The Open–source PKI Book: A guide to PKIs and Open–source Implementations</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="certificates.htm">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom">Chapter 2. Introduction to Cryptography</TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="description-pki.htm">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><DIVCLASS="SECT1"><H1CLASS="SECT1"><ANAME="CA">Certification Authority</A></H1><P> The trusted agency that signs Certificates with its private key and lets others verify Certificates by the usage of the corresponding public key is called a Certification Authority, or <SPANCLASS="ACRONYM">CA</SPAN>. This Certification Authority is also known as a Trusted Third Party (<SPANCLASS="ACRONYM">TTP</SPAN>), since it is regarded that, in order to be trusted, it should not have common interests with any of the two parties. </P><DIVCLASS="NOTE"><P></P><TABLECLASS="NOTE"WIDTH="100%"BORDER="0"><TR><TDWIDTH="25"ALIGN="CENTER"VALIGN="TOP"><IMGSRC="stylesheet-images/note.gif"HSPACE="5"ALT="Note"></TD><TDALIGN="LEFT"VALIGN="TOP"><P> It is believed that a bank should not be a Certification Authority and also be the party that you make economic transactions with. They reason is that, as a CA, it can favor itself, as a party one does business with. </P></TD></TR></TABLE></DIV><P> In this document we concentrate on the technical aspects of the Certification Authority. </P></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLEWIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="certificates.htm">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="ospki-book.htm">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="description-pki.htm">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">Certificates</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="introduction-to-cryptography.htm">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">Basic functionality of a Public Key Infrastructure[TODO]</TD></TR></TABLE></DIV></BODY></HTML>⌨️ 快捷键说明
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