certificates.htm

来自「The Open–source PKI Book Version 2.4.6 E」· HTM 代码 · 共 152 行

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<HTML><HEAD><TITLE>Certificates</TITLE><METANAME="GENERATOR"CONTENT="Modular DocBook HTML Stylesheet Version 1.55"><LINKREL="HOME"TITLE="The Open&#8211;source PKI Book"HREF="ospki-book.htm"><LINKREL="UP"TITLE="Introduction to Cryptography"HREF="introduction-to-cryptography.htm"><LINKREL="PREVIOUS"TITLE="Digital Signatures"HREF="signatures.htm"><LINKREL="NEXT"TITLE="Certification Authority"HREF="ca.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&#8211;source PKI Book: A guide to PKIs and Open&#8211;source Implementations</TH></TR><TR><TDWIDTH="10%"ALIGN="left"VALIGN="bottom"><AHREF="signatures.htm">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom">Chapter 2. Introduction to Cryptography</TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="ca.htm">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><DIVCLASS="SECT1"><H1CLASS="SECT1"><ANAME="CERTIFICATES">Certificates</A></H1><P>	Although Alice could have sent a private message to the bank, 	signed it, and ensured the integrity of the message, she	still needs to be sure that she is really communicating with the bank. 	This means that she needs to be sure that the public key she is 	using corresponds to the bank's private key. Similarly, the bank 	also needs to verify that the message signature really corresponds 	to Alice's signature.   </P><P>	If each party has a certificate which validates the other's identity, 	confirms the public key, and is signed by a trusted agency, then they 	both are assured that they are communicating with whom they think 	they are. Each party uses the public key of the trusted agency	to verify the certificate of the other party and subsequently to	ensure the authenticity of the users' public key.  </P></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLEWIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="signatures.htm">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="ospki-book.htm">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="ca.htm">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">Digital Signatures</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="introduction-to-cryptography.htm">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">Certification Authority</TD></TR></TABLE></DIV></BODY></HTML>

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