x169.htm

来自「The Open–source PKI Book Version 2.4.6 E」· HTM 代码 · 共 145 行

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<HTML><HEAD><TITLE>Typical uses of public key cryptography</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="Basic functionality of a Public Key Infrastructure[TODO]"HREF="description-pki.htm"><LINKREL="PREVIOUS"TITLE="Certification Authority chains"HREF="x164.htm"><LINKREL="NEXT"TITLE="General implementation overview"HREF="implementation-overview.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="x164.htm">Prev</A></TD><TDWIDTH="80%"ALIGN="center"VALIGN="bottom">Chapter 3. Basic functionality of a Public Key Infrastructure[TODO]</TD><TDWIDTH="10%"ALIGN="right"VALIGN="bottom"><AHREF="implementation-overview.htm">Next</A></TD></TR></TABLE><HRALIGN="LEFT"WIDTH="100%"></DIV><DIVCLASS="SECT1"><H1CLASS="SECT1"><ANAME="AEN169">Typical uses of public key cryptography</A></H1><P>  	Having the authentic public keys of each other, users can 	communicate securely. They can encrypt data and	make use of digital signatures.	For the part of encryption, public key cryptography 	is too slow to be used for the transfer of large quantity of data.	A symmetric cipher is more suited to this purpose.	For this reason, the key for the symmetric cipher is transferred 	encrypted using public&#8211;key cryptography.  </P></DIV><DIVCLASS="NAVFOOTER"><HRALIGN="LEFT"WIDTH="100%"><TABLEWIDTH="100%"BORDER="0"CELLPADDING="0"CELLSPACING="0"><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top"><AHREF="x164.htm">Prev</A></TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="ospki-book.htm">Home</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top"><AHREF="implementation-overview.htm">Next</A></TD></TR><TR><TDWIDTH="33%"ALIGN="left"VALIGN="top">Certification Authority chains</TD><TDWIDTH="34%"ALIGN="center"VALIGN="top"><AHREF="description-pki.htm">Up</A></TD><TDWIDTH="33%"ALIGN="right"VALIGN="top">General implementation overview</TD></TR></TABLE></DIV></BODY></HTML>

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