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<H3><A class="LINK" name="2a"></A><FONT color="navy">Encryption and Decryption </FONT>
</H3>
<P><FONT color="navy">The <B>System.Security.Cryptographic </B>namespace within the
Microsoft .NET Framework provides a variety of tools to aid in encryption and
decryption. The <B>CryptoStream </B>class is used here to demonstrate the
encryption and decryption with <STRONG>System.Security.Cryptographic.SymmetricAlgorithm</STRONG>,
such as <STRONG>DESCryptoServiceProvider, RC2CryptoServiceProvider, </STRONG>and
<STRONG>RijndaelManaged </STRONG>classes.</FONT></P>
<P><FONT color="navy">I have searched the Internet for some samples and all I found
were based on the Microsoft sample code ( </FONT><A href="http://support.microsoft.com/directory/article.asp?ID=KB;EN-US;Q307010">
<FONT color="navy">http://support.microsoft.com/directory/article.asp?ID=KB;EN-US;Q307010</FONT></A><FONT color="navy"> )
which basically uses input/output files as source and destination. I
would like to have the encryption and decryption done in memory without having
to specify source and destintion files, so that I could use the code on a web
server or so.</FONT></P>
<P><FONT color="navy">If you have any questions, please email to: </FONT><A href="mailto:fangfrank@hotmail.com">
<FONT color="navy">fangfrank@hotmail.com</FONT></A></P>
<P><FONT color="navy">Frank Fang</FONT></P>
<P> </P>
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<asp:HyperLink id="HyperLink1" style="Z-INDEX: 102; LEFT: 222px; POSITION: absolute; TOP: 372px" runat="server" NavigateUrl="crypto.asmx">Demon</asp:HyperLink>
<asp:HyperLink id="hlnkSource" style="Z-INDEX: 103; LEFT: 385px; POSITION: absolute; TOP: 373px" runat="server" NavigateUrl="SymmCrypto.htm">Source Code</asp:HyperLink>
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